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How to use recursive function that converts csv file to multidimensional array
How do I check if an array includes an object in JavaScript?How do you convert a byte array to a hexadecimal string, and vice versa?How to append something to an array?How to insert an item into an array at a specific index (JavaScript)?How do you check if a variable is an array in JavaScript?How do I determine whether an array contains a particular value in Java?How do I declare and initialize an array in Java?How do I empty an array in JavaScript?How to check if an object is an array?How do I remove a particular element from an array in JavaScript?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
-1
i'm trying to figure out how to create a recursive function (PHP) that merges csv file into a multi dimensional array.
i got a csv file that looks like this
id,parent_id,date
1,0,2017
2,1,2017-01
3,1,2017-02
4,1,2017-03
5,1,2017-04
6,1,2017-05
7,1,2017-06
8,1,2017-07
9,1,2017-08
10,1,2017-09
11,1,2017-10
12,1,2017-11
13,1,2017-12
14,0,2018
15,14,2018-01
16,14,2018-02
17,14,2018-03
18,14,2018-04
19,14,2018-05
20,14,2018-06
21,14,2018-07
22,14,2018-08
23,14,2018-09
24,14,2018-10
25,14,2018-11
26,14,2018-12
27,0,2019
28,27,2019-01
29,27,2019-02
30,27,2019-03
31,27,2019-04
32,27,2019-05
33,27,2019-06
34,27,2019-07
35,27,2019-08
36,27,2019-09
37,27,2019-10
38,27,2019-11
39,27,2019-12
and the output should be like this -
Array
(
[1] => Array
(
[date] => 2017
[dates] => Array
(
[2] => 2017-01
[3] => 2017-02
[4] => 2017-03
[5] => 2017-04
[6] => 2017-05
[7] => 2017-06
[8] => 2017-07
[9] => 2017-08
[10] => 2017-09
[11] => 2017-10
[12] => 2017-11
[13] => 2017-12
)
)
[14] => Array
(
[date] => 2018
[dates] => Array
(
[15] => 2018-01
[16] => 2018-02
[17] => 2018-03
[18] => 2018-04
[19] => 2018-05
[20] => 2018-06
[21] => 2018-07
[22] => 2018-08
[23] => 2018-09
[24] => 2018-10
[25] => 2018-11
[26] => 2018-12
)
)
[27] => Array
(
[date] => 2019
[dates] => Array
(
[28] => 2019-01
[29] => 2019-02
[30] => 2019-03
[31] => 2019-04
[32] => 2019-05
[33] => 2019-06
[34] => 2019-07
[35] => 2019-08
[36] => 2019-09
[37] => 2019-10
[38] => 2019-11
[39] => 2019-12
)
)
)
i'm reading the csv file into an array, with this output -
Array(
[0] => Array(
[0] => id[1] => parent_id[2] => date
) [1] => Array(
[0] => 1[1] => 0[2] => 2017
) [2] => Array(
[0] => 2[1] => 1[2] => 2017 - 01
) [3] => Array(
[0] => 3[1] => 1[2] => 2017 - 02
) [4] => Array(
[0] => 4[1] => 1[2] => 2017 - 03
) [5] => Array(
[0] => 5[1] => 1[2] => 2017 - 04
) [6] => Array(
[0] => 6[1] => 1[2] => 2017 - 05
) [7] => Array(
[0] => 7[1] => 1[2] => 2017 - 06
) [8] => Array(
[0] => 8[1] => 1[2] => 2017 - 07
) [9] => Array(
[0] => 9[1] => 1[2] => 2017 - 08
) [10] => Array(
[0] => 10[1] => 1[2] => 2017 - 09
) [11] => Array(
[0] => 11[1] => 1[2] => 2017 - 10
) [12] => Array(
[0] => 12[1] => 1[2] => 2017 - 11
) [13] => Array(
[0] => 13[1] => 1[2] => 2017 - 12
) [14] => Array(
[0] => 14[1] => 0[2] => 2018
) [15] => Array(
[0] => 15[1] => 14[2] => 2018 - 01
) [16] => Array(
[0] => 16[1] => 14[2] => 2018 - 02
) [17] => Array(
[0] => 17[1] => 14[2] => 2018 - 03
) [18] => Array(
[0] => 18[1] => 14[2] => 2018 - 04
) [19] => Array(
[0] => 19[1] => 14[2] => 2018 - 05
) [20] => Array(
[0] => 20[1] => 14[2] => 2018 - 06
) [21] => Array(
[0] => 21[1] => 14[2] => 2018 - 07
) [22] => Array(
[0] => 22[1] => 14[2] => 2018 - 08
) [23] => Array(
[0] => 23[1] => 14[2] => 2018 - 09
) [24] => Array(
[0] => 24[1] => 14[2] => 2018 - 10
) [25] => Array(
[0] => 25[1] => 14[2] => 2018 - 11
) [26] => Array(
[0] => 26[1] => 14[2] => 2018 - 12
) [27] => Array(
[0] => 27[1] => 0[2] => 2019
) [28] => Array(
[0] => 28[1] => 27[2] => 2019 - 01
) [29] => Array(
[0] => 29[1] => 27[2] => 2019 - 02
) [30] => Array(
[0] => 30[1] => 27[2] => 2019 - 03
) [31] => Array(
[0] => 31[1] => 27[2] => 2019 - 04
) [32] => Array(
[0] => 32[1] => 27[2] => 2019 - 05
) [33] => Array(
[0] => 33[1] => 27[2] => 2019 - 06
) [34] => Array(
[0] => 34[1] => 27[2] => 2019 - 07
) [35] => Array(
[0] => 35[1] => 27[2] => 2019 - 08
) [36] => Array(
[0] => 36[1] => 27[2] => 2019 - 09
) [37] => Array(
[0] => 37[1] => 27[2] => 2019 - 10
) [38] => Array(
[0] => 38[1] => 27[2] => 2019 - 11
) [39] => Array(
[0] => 39[1] => 27[2] => 2019 - 12
)
)
and i'm trying to apply this array on this function that should get me the output that i wanted
function buildTree(array $elements, $parentId = 0)
$branch = array();
foreach ($elements as $element)
if ($element['parent_id'] == $parentId)
$children = buildTree($elements, $element['id']);
if ($children)
$element['children'] = $children;
$branch[] = $element;
return $branch;
$tree = buildTree($MyArray);
but i just cant figure out how to apply the recursive function over here, and how to use the 'parent id' and 'id' elements in the foreach scope...
i'm really lost at this point.
php arrays
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
add a comment |
-1
i'm trying to figure out how to create a recursive function (PHP) that merges csv file into a multi dimensional array.
i got a csv file that looks like this
id,parent_id,date
1,0,2017
2,1,2017-01
3,1,2017-02
4,1,2017-03
5,1,2017-04
6,1,2017-05
7,1,2017-06
8,1,2017-07
9,1,2017-08
10,1,2017-09
11,1,2017-10
12,1,2017-11
13,1,2017-12
14,0,2018
15,14,2018-01
16,14,2018-02
17,14,2018-03
18,14,2018-04
19,14,2018-05
20,14,2018-06
21,14,2018-07
22,14,2018-08
23,14,2018-09
24,14,2018-10
25,14,2018-11
26,14,2018-12
27,0,2019
28,27,2019-01
29,27,2019-02
30,27,2019-03
31,27,2019-04
32,27,2019-05
33,27,2019-06
34,27,2019-07
35,27,2019-08
36,27,2019-09
37,27,2019-10
38,27,2019-11
39,27,2019-12
and the output should be like this -
Array
(
[1] => Array
(
[date] => 2017
[dates] => Array
(
[2] => 2017-01
[3] => 2017-02
[4] => 2017-03
[5] => 2017-04
[6] => 2017-05
[7] => 2017-06
[8] => 2017-07
[9] => 2017-08
[10] => 2017-09
[11] => 2017-10
[12] => 2017-11
[13] => 2017-12
)
)
[14] => Array
(
[date] => 2018
[dates] => Array
(
[15] => 2018-01
[16] => 2018-02
[17] => 2018-03
[18] => 2018-04
[19] => 2018-05
[20] => 2018-06
[21] => 2018-07
[22] => 2018-08
[23] => 2018-09
[24] => 2018-10
[25] => 2018-11
[26] => 2018-12
)
)
[27] => Array
(
[date] => 2019
[dates] => Array
(
[28] => 2019-01
[29] => 2019-02
[30] => 2019-03
[31] => 2019-04
[32] => 2019-05
[33] => 2019-06
[34] => 2019-07
[35] => 2019-08
[36] => 2019-09
[37] => 2019-10
[38] => 2019-11
[39] => 2019-12
)
)
)
i'm reading the csv file into an array, with this output -
Array(
[0] => Array(
[0] => id[1] => parent_id[2] => date
) [1] => Array(
[0] => 1[1] => 0[2] => 2017
) [2] => Array(
[0] => 2[1] => 1[2] => 2017 - 01
) [3] => Array(
[0] => 3[1] => 1[2] => 2017 - 02
) [4] => Array(
[0] => 4[1] => 1[2] => 2017 - 03
) [5] => Array(
[0] => 5[1] => 1[2] => 2017 - 04
) [6] => Array(
[0] => 6[1] => 1[2] => 2017 - 05
) [7] => Array(
[0] => 7[1] => 1[2] => 2017 - 06
) [8] => Array(
[0] => 8[1] => 1[2] => 2017 - 07
) [9] => Array(
[0] => 9[1] => 1[2] => 2017 - 08
) [10] => Array(
[0] => 10[1] => 1[2] => 2017 - 09
) [11] => Array(
[0] => 11[1] => 1[2] => 2017 - 10
) [12] => Array(
[0] => 12[1] => 1[2] => 2017 - 11
) [13] => Array(
[0] => 13[1] => 1[2] => 2017 - 12
) [14] => Array(
[0] => 14[1] => 0[2] => 2018
) [15] => Array(
[0] => 15[1] => 14[2] => 2018 - 01
) [16] => Array(
[0] => 16[1] => 14[2] => 2018 - 02
) [17] => Array(
[0] => 17[1] => 14[2] => 2018 - 03
) [18] => Array(
[0] => 18[1] => 14[2] => 2018 - 04
) [19] => Array(
[0] => 19[1] => 14[2] => 2018 - 05
) [20] => Array(
[0] => 20[1] => 14[2] => 2018 - 06
) [21] => Array(
[0] => 21[1] => 14[2] => 2018 - 07
) [22] => Array(
[0] => 22[1] => 14[2] => 2018 - 08
) [23] => Array(
[0] => 23[1] => 14[2] => 2018 - 09
) [24] => Array(
[0] => 24[1] => 14[2] => 2018 - 10
) [25] => Array(
[0] => 25[1] => 14[2] => 2018 - 11
) [26] => Array(
[0] => 26[1] => 14[2] => 2018 - 12
) [27] => Array(
[0] => 27[1] => 0[2] => 2019
) [28] => Array(
[0] => 28[1] => 27[2] => 2019 - 01
) [29] => Array(
[0] => 29[1] => 27[2] => 2019 - 02
) [30] => Array(
[0] => 30[1] => 27[2] => 2019 - 03
) [31] => Array(
[0] => 31[1] => 27[2] => 2019 - 04
) [32] => Array(
[0] => 32[1] => 27[2] => 2019 - 05
) [33] => Array(
[0] => 33[1] => 27[2] => 2019 - 06
) [34] => Array(
[0] => 34[1] => 27[2] => 2019 - 07
) [35] => Array(
[0] => 35[1] => 27[2] => 2019 - 08
) [36] => Array(
[0] => 36[1] => 27[2] => 2019 - 09
) [37] => Array(
[0] => 37[1] => 27[2] => 2019 - 10
) [38] => Array(
[0] => 38[1] => 27[2] => 2019 - 11
) [39] => Array(
[0] => 39[1] => 27[2] => 2019 - 12
)
)
and i'm trying to apply this array on this function that should get me the output that i wanted
function buildTree(array $elements, $parentId = 0)
$branch = array();
foreach ($elements as $element)
if ($element['parent_id'] == $parentId)
$children = buildTree($elements, $element['id']);
if ($children)
$element['children'] = $children;
$branch[] = $element;
return $branch;
$tree = buildTree($MyArray);
but i just cant figure out how to apply the recursive function over here, and how to use the 'parent id' and 'id' elements in the foreach scope...
i'm really lost at this point.
php arrays
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09
add a comment |
-1
-1
-1
i'm trying to figure out how to create a recursive function (PHP) that merges csv file into a multi dimensional array.
i got a csv file that looks like this
id,parent_id,date
1,0,2017
2,1,2017-01
3,1,2017-02
4,1,2017-03
5,1,2017-04
6,1,2017-05
7,1,2017-06
8,1,2017-07
9,1,2017-08
10,1,2017-09
11,1,2017-10
12,1,2017-11
13,1,2017-12
14,0,2018
15,14,2018-01
16,14,2018-02
17,14,2018-03
18,14,2018-04
19,14,2018-05
20,14,2018-06
21,14,2018-07
22,14,2018-08
23,14,2018-09
24,14,2018-10
25,14,2018-11
26,14,2018-12
27,0,2019
28,27,2019-01
29,27,2019-02
30,27,2019-03
31,27,2019-04
32,27,2019-05
33,27,2019-06
34,27,2019-07
35,27,2019-08
36,27,2019-09
37,27,2019-10
38,27,2019-11
39,27,2019-12
and the output should be like this -
Array
(
[1] => Array
(
[date] => 2017
[dates] => Array
(
[2] => 2017-01
[3] => 2017-02
[4] => 2017-03
[5] => 2017-04
[6] => 2017-05
[7] => 2017-06
[8] => 2017-07
[9] => 2017-08
[10] => 2017-09
[11] => 2017-10
[12] => 2017-11
[13] => 2017-12
)
)
[14] => Array
(
[date] => 2018
[dates] => Array
(
[15] => 2018-01
[16] => 2018-02
[17] => 2018-03
[18] => 2018-04
[19] => 2018-05
[20] => 2018-06
[21] => 2018-07
[22] => 2018-08
[23] => 2018-09
[24] => 2018-10
[25] => 2018-11
[26] => 2018-12
)
)
[27] => Array
(
[date] => 2019
[dates] => Array
(
[28] => 2019-01
[29] => 2019-02
[30] => 2019-03
[31] => 2019-04
[32] => 2019-05
[33] => 2019-06
[34] => 2019-07
[35] => 2019-08
[36] => 2019-09
[37] => 2019-10
[38] => 2019-11
[39] => 2019-12
)
)
)
i'm reading the csv file into an array, with this output -
Array(
[0] => Array(
[0] => id[1] => parent_id[2] => date
) [1] => Array(
[0] => 1[1] => 0[2] => 2017
) [2] => Array(
[0] => 2[1] => 1[2] => 2017 - 01
) [3] => Array(
[0] => 3[1] => 1[2] => 2017 - 02
) [4] => Array(
[0] => 4[1] => 1[2] => 2017 - 03
) [5] => Array(
[0] => 5[1] => 1[2] => 2017 - 04
) [6] => Array(
[0] => 6[1] => 1[2] => 2017 - 05
) [7] => Array(
[0] => 7[1] => 1[2] => 2017 - 06
) [8] => Array(
[0] => 8[1] => 1[2] => 2017 - 07
) [9] => Array(
[0] => 9[1] => 1[2] => 2017 - 08
) [10] => Array(
[0] => 10[1] => 1[2] => 2017 - 09
) [11] => Array(
[0] => 11[1] => 1[2] => 2017 - 10
) [12] => Array(
[0] => 12[1] => 1[2] => 2017 - 11
) [13] => Array(
[0] => 13[1] => 1[2] => 2017 - 12
) [14] => Array(
[0] => 14[1] => 0[2] => 2018
) [15] => Array(
[0] => 15[1] => 14[2] => 2018 - 01
) [16] => Array(
[0] => 16[1] => 14[2] => 2018 - 02
) [17] => Array(
[0] => 17[1] => 14[2] => 2018 - 03
) [18] => Array(
[0] => 18[1] => 14[2] => 2018 - 04
) [19] => Array(
[0] => 19[1] => 14[2] => 2018 - 05
) [20] => Array(
[0] => 20[1] => 14[2] => 2018 - 06
) [21] => Array(
[0] => 21[1] => 14[2] => 2018 - 07
) [22] => Array(
[0] => 22[1] => 14[2] => 2018 - 08
) [23] => Array(
[0] => 23[1] => 14[2] => 2018 - 09
) [24] => Array(
[0] => 24[1] => 14[2] => 2018 - 10
) [25] => Array(
[0] => 25[1] => 14[2] => 2018 - 11
) [26] => Array(
[0] => 26[1] => 14[2] => 2018 - 12
) [27] => Array(
[0] => 27[1] => 0[2] => 2019
) [28] => Array(
[0] => 28[1] => 27[2] => 2019 - 01
) [29] => Array(
[0] => 29[1] => 27[2] => 2019 - 02
) [30] => Array(
[0] => 30[1] => 27[2] => 2019 - 03
) [31] => Array(
[0] => 31[1] => 27[2] => 2019 - 04
) [32] => Array(
[0] => 32[1] => 27[2] => 2019 - 05
) [33] => Array(
[0] => 33[1] => 27[2] => 2019 - 06
) [34] => Array(
[0] => 34[1] => 27[2] => 2019 - 07
) [35] => Array(
[0] => 35[1] => 27[2] => 2019 - 08
) [36] => Array(
[0] => 36[1] => 27[2] => 2019 - 09
) [37] => Array(
[0] => 37[1] => 27[2] => 2019 - 10
) [38] => Array(
[0] => 38[1] => 27[2] => 2019 - 11
) [39] => Array(
[0] => 39[1] => 27[2] => 2019 - 12
)
)
and i'm trying to apply this array on this function that should get me the output that i wanted
function buildTree(array $elements, $parentId = 0)
$branch = array();
foreach ($elements as $element)
if ($element['parent_id'] == $parentId)
$children = buildTree($elements, $element['id']);
if ($children)
$element['children'] = $children;
$branch[] = $element;
return $branch;
$tree = buildTree($MyArray);
but i just cant figure out how to apply the recursive function over here, and how to use the 'parent id' and 'id' elements in the foreach scope...
i'm really lost at this point.
php arrays
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
i'm trying to figure out how to create a recursive function (PHP) that merges csv file into a multi dimensional array.
i got a csv file that looks like this
id,parent_id,date
1,0,2017
2,1,2017-01
3,1,2017-02
4,1,2017-03
5,1,2017-04
6,1,2017-05
7,1,2017-06
8,1,2017-07
9,1,2017-08
10,1,2017-09
11,1,2017-10
12,1,2017-11
13,1,2017-12
14,0,2018
15,14,2018-01
16,14,2018-02
17,14,2018-03
18,14,2018-04
19,14,2018-05
20,14,2018-06
21,14,2018-07
22,14,2018-08
23,14,2018-09
24,14,2018-10
25,14,2018-11
26,14,2018-12
27,0,2019
28,27,2019-01
29,27,2019-02
30,27,2019-03
31,27,2019-04
32,27,2019-05
33,27,2019-06
34,27,2019-07
35,27,2019-08
36,27,2019-09
37,27,2019-10
38,27,2019-11
39,27,2019-12
and the output should be like this -
Array
(
[1] => Array
(
[date] => 2017
[dates] => Array
(
[2] => 2017-01
[3] => 2017-02
[4] => 2017-03
[5] => 2017-04
[6] => 2017-05
[7] => 2017-06
[8] => 2017-07
[9] => 2017-08
[10] => 2017-09
[11] => 2017-10
[12] => 2017-11
[13] => 2017-12
)
)
[14] => Array
(
[date] => 2018
[dates] => Array
(
[15] => 2018-01
[16] => 2018-02
[17] => 2018-03
[18] => 2018-04
[19] => 2018-05
[20] => 2018-06
[21] => 2018-07
[22] => 2018-08
[23] => 2018-09
[24] => 2018-10
[25] => 2018-11
[26] => 2018-12
)
)
[27] => Array
(
[date] => 2019
[dates] => Array
(
[28] => 2019-01
[29] => 2019-02
[30] => 2019-03
[31] => 2019-04
[32] => 2019-05
[33] => 2019-06
[34] => 2019-07
[35] => 2019-08
[36] => 2019-09
[37] => 2019-10
[38] => 2019-11
[39] => 2019-12
)
)
)
i'm reading the csv file into an array, with this output -
Array(
[0] => Array(
[0] => id[1] => parent_id[2] => date
) [1] => Array(
[0] => 1[1] => 0[2] => 2017
) [2] => Array(
[0] => 2[1] => 1[2] => 2017 - 01
) [3] => Array(
[0] => 3[1] => 1[2] => 2017 - 02
) [4] => Array(
[0] => 4[1] => 1[2] => 2017 - 03
) [5] => Array(
[0] => 5[1] => 1[2] => 2017 - 04
) [6] => Array(
[0] => 6[1] => 1[2] => 2017 - 05
) [7] => Array(
[0] => 7[1] => 1[2] => 2017 - 06
) [8] => Array(
[0] => 8[1] => 1[2] => 2017 - 07
) [9] => Array(
[0] => 9[1] => 1[2] => 2017 - 08
) [10] => Array(
[0] => 10[1] => 1[2] => 2017 - 09
) [11] => Array(
[0] => 11[1] => 1[2] => 2017 - 10
) [12] => Array(
[0] => 12[1] => 1[2] => 2017 - 11
) [13] => Array(
[0] => 13[1] => 1[2] => 2017 - 12
) [14] => Array(
[0] => 14[1] => 0[2] => 2018
) [15] => Array(
[0] => 15[1] => 14[2] => 2018 - 01
) [16] => Array(
[0] => 16[1] => 14[2] => 2018 - 02
) [17] => Array(
[0] => 17[1] => 14[2] => 2018 - 03
) [18] => Array(
[0] => 18[1] => 14[2] => 2018 - 04
) [19] => Array(
[0] => 19[1] => 14[2] => 2018 - 05
) [20] => Array(
[0] => 20[1] => 14[2] => 2018 - 06
) [21] => Array(
[0] => 21[1] => 14[2] => 2018 - 07
) [22] => Array(
[0] => 22[1] => 14[2] => 2018 - 08
) [23] => Array(
[0] => 23[1] => 14[2] => 2018 - 09
) [24] => Array(
[0] => 24[1] => 14[2] => 2018 - 10
) [25] => Array(
[0] => 25[1] => 14[2] => 2018 - 11
) [26] => Array(
[0] => 26[1] => 14[2] => 2018 - 12
) [27] => Array(
[0] => 27[1] => 0[2] => 2019
) [28] => Array(
[0] => 28[1] => 27[2] => 2019 - 01
) [29] => Array(
[0] => 29[1] => 27[2] => 2019 - 02
) [30] => Array(
[0] => 30[1] => 27[2] => 2019 - 03
) [31] => Array(
[0] => 31[1] => 27[2] => 2019 - 04
) [32] => Array(
[0] => 32[1] => 27[2] => 2019 - 05
) [33] => Array(
[0] => 33[1] => 27[2] => 2019 - 06
) [34] => Array(
[0] => 34[1] => 27[2] => 2019 - 07
) [35] => Array(
[0] => 35[1] => 27[2] => 2019 - 08
) [36] => Array(
[0] => 36[1] => 27[2] => 2019 - 09
) [37] => Array(
[0] => 37[1] => 27[2] => 2019 - 10
) [38] => Array(
[0] => 38[1] => 27[2] => 2019 - 11
) [39] => Array(
[0] => 39[1] => 27[2] => 2019 - 12
)
)
and i'm trying to apply this array on this function that should get me the output that i wanted
function buildTree(array $elements, $parentId = 0)
$branch = array();
foreach ($elements as $element)
if ($element['parent_id'] == $parentId)
$children = buildTree($elements, $element['id']);
if ($children)
$element['children'] = $children;
$branch[] = $element;
return $branch;
$tree = buildTree($MyArray);
but i just cant figure out how to apply the recursive function over here, and how to use the 'parent id' and 'id' elements in the foreach scope...
i'm really lost at this point.
php arrays
php arrays
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
edited Mar 28 at 8:36
Àtishking
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
asked Mar 27 at 16:06
ÀtishkingÀtishking
216 bronze badges
216 bronze badges
I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09
add a comment |
I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09
I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09
add a comment |
1 Answer
1
active
oldest
votes
0
Every for loop can be converted into recursive function. You can create the following recursion function:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = explode(",",array_shift($arr));
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Then use it with (example):
$arr = ["1,0,2017", "2,1,2017-01", "3,1,2017-02", "14,0,2018", "15,14,2018-01", "16,14,2018-02"];
$res = setElement([], $arr);
Now $res will contain your desire output.
Edit:
If your data comes from csv file you need to load them first. You may use fgetcsv as the follow function:
function getCSVarray($path)
if (($handle = fopen($path, "r")) !== FALSE)
$keys = fgetcsv($handle, 1000, ",");
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
$res[] = array_combine($keys, $data);
return $res;
Now use as:
$res = setElement([], getCSVarray("array.csv"));
Notice to modify setElement as now the indexes changed!
As:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e["parent_id"]]))
$res[$e["parent_id"]]["dates"][$e["id"]] = $e["date"]; // if exist add it
else $res[$e["id]] = array("date" => $e["date"], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Edit 2:
Using your array ($MyArray) you can use:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
//using it as:
array_shift($MyArray); // extract first element as it is the keys
$res = setElement([], $MyArray);
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
i am trying to use you're example (which looks great) and i'm using the array like this -$arr = 'array.csv'(the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?
– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
|
show 11 more comments
Your Answer
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Every for loop can be converted into recursive function. You can create the following recursion function:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = explode(",",array_shift($arr));
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Then use it with (example):
$arr = ["1,0,2017", "2,1,2017-01", "3,1,2017-02", "14,0,2018", "15,14,2018-01", "16,14,2018-02"];
$res = setElement([], $arr);
Now $res will contain your desire output.
Edit:
If your data comes from csv file you need to load them first. You may use fgetcsv as the follow function:
function getCSVarray($path)
if (($handle = fopen($path, "r")) !== FALSE)
$keys = fgetcsv($handle, 1000, ",");
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
$res[] = array_combine($keys, $data);
return $res;
Now use as:
$res = setElement([], getCSVarray("array.csv"));
Notice to modify setElement as now the indexes changed!
As:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e["parent_id"]]))
$res[$e["parent_id"]]["dates"][$e["id"]] = $e["date"]; // if exist add it
else $res[$e["id]] = array("date" => $e["date"], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Edit 2:
Using your array ($MyArray) you can use:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
//using it as:
array_shift($MyArray); // extract first element as it is the keys
$res = setElement([], $MyArray);
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
i am trying to use you're example (which looks great) and i'm using the array like this -$arr = 'array.csv'(the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?
– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
|
show 11 more comments
0
Every for loop can be converted into recursive function. You can create the following recursion function:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = explode(",",array_shift($arr));
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Then use it with (example):
$arr = ["1,0,2017", "2,1,2017-01", "3,1,2017-02", "14,0,2018", "15,14,2018-01", "16,14,2018-02"];
$res = setElement([], $arr);
Now $res will contain your desire output.
Edit:
If your data comes from csv file you need to load them first. You may use fgetcsv as the follow function:
function getCSVarray($path)
if (($handle = fopen($path, "r")) !== FALSE)
$keys = fgetcsv($handle, 1000, ",");
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
$res[] = array_combine($keys, $data);
return $res;
Now use as:
$res = setElement([], getCSVarray("array.csv"));
Notice to modify setElement as now the indexes changed!
As:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e["parent_id"]]))
$res[$e["parent_id"]]["dates"][$e["id"]] = $e["date"]; // if exist add it
else $res[$e["id]] = array("date" => $e["date"], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Edit 2:
Using your array ($MyArray) you can use:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
//using it as:
array_shift($MyArray); // extract first element as it is the keys
$res = setElement([], $MyArray);
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
i am trying to use you're example (which looks great) and i'm using the array like this -$arr = 'array.csv'(the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?
– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
|
show 11 more comments
0
0
0
Every for loop can be converted into recursive function. You can create the following recursion function:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = explode(",",array_shift($arr));
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Then use it with (example):
$arr = ["1,0,2017", "2,1,2017-01", "3,1,2017-02", "14,0,2018", "15,14,2018-01", "16,14,2018-02"];
$res = setElement([], $arr);
Now $res will contain your desire output.
Edit:
If your data comes from csv file you need to load them first. You may use fgetcsv as the follow function:
function getCSVarray($path)
if (($handle = fopen($path, "r")) !== FALSE)
$keys = fgetcsv($handle, 1000, ",");
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
$res[] = array_combine($keys, $data);
return $res;
Now use as:
$res = setElement([], getCSVarray("array.csv"));
Notice to modify setElement as now the indexes changed!
As:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e["parent_id"]]))
$res[$e["parent_id"]]["dates"][$e["id"]] = $e["date"]; // if exist add it
else $res[$e["id]] = array("date" => $e["date"], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Edit 2:
Using your array ($MyArray) you can use:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
//using it as:
array_shift($MyArray); // extract first element as it is the keys
$res = setElement([], $MyArray);
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
Every for loop can be converted into recursive function. You can create the following recursion function:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = explode(",",array_shift($arr));
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Then use it with (example):
$arr = ["1,0,2017", "2,1,2017-01", "3,1,2017-02", "14,0,2018", "15,14,2018-01", "16,14,2018-02"];
$res = setElement([], $arr);
Now $res will contain your desire output.
Edit:
If your data comes from csv file you need to load them first. You may use fgetcsv as the follow function:
function getCSVarray($path)
if (($handle = fopen($path, "r")) !== FALSE)
$keys = fgetcsv($handle, 1000, ",");
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
$res[] = array_combine($keys, $data);
return $res;
Now use as:
$res = setElement([], getCSVarray("array.csv"));
Notice to modify setElement as now the indexes changed!
As:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e["parent_id"]]))
$res[$e["parent_id"]]["dates"][$e["id"]] = $e["date"]; // if exist add it
else $res[$e["id]] = array("date" => $e["date"], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
Edit 2:
Using your array ($MyArray) you can use:
function setElement($res, $arr)
if (count($arr) == 0)
return $res;
$e = array_shift($arr);
if (isset($res[$e[1]]))
$res[$e[1]]["dates"][$e[0]] = $e[2]; // if exist add it
else $res[$e[0]] = array("date" => $e[2], "dates" => []); // not existed yet - so init it
return setElement($res, $arr);
//using it as:
array_shift($MyArray); // extract first element as it is the keys
$res = setElement([], $MyArray);
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
edited Mar 28 at 12:36
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
answered Mar 27 at 16:54
dWinderdWinder
9,9273 gold badges15 silver badges32 bronze badges
9,9273 gold badges15 silver badges32 bronze badges
i am trying to use you're example (which looks great) and i'm using the array like this -$arr = 'array.csv'(the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?
– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
|
show 11 more comments
i am trying to use you're example (which looks great) and i'm using the array like this -$arr = 'array.csv'(the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?
– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
i am trying to use you're example (which looks great) and i'm using the array like this -
$arr = 'array.csv' (the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?– Àtishking
Mar 28 at 6:24
i am trying to use you're example (which looks great) and i'm using the array like this -
$arr = 'array.csv' (the csv file that contains the list, they are in the same folder of course) , and then using this $arr var like you used it, but it is not working for me... any idea why?– Àtishking
Mar 28 at 6:24
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
@Àtishking edit my answer with reading the csv first
– dWinder
Mar 28 at 6:34
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
i'm getting this error - Warning: explode() expects parameter 2 to be string, array given in D:ComputershtdocsProjectarray.php this line - $e = explode(",",array_shift($arr));
– Àtishking
Mar 28 at 8:49
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
@Àtishking as I said - you need modification - updated my answer accordingly
– dWinder
Mar 28 at 9:00
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
first of all - i want to thank you for your patience, this is so not taken for granted. second of all, im using $res = setElement([], $MyArray); (MyArray is the array i loaded from the csv file) and than your function - and it is - still not working. i am getting error of " Undefined index id / parent id / date and so..."
– Àtishking
Mar 28 at 9:16
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I don't see any reason for recursive function.
– u_mulder
Mar 27 at 16:08
i see that, but this is what the lecturer asked for.. @u_mulder
– Àtishking
Mar 27 at 16:09