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Compare two arrays diferent length

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0

I have 2 arrays in jade, with different length sizes I just want to validate if the id is the same so that those are selected and the others are not

 // jsCategory length 6
 var jsCategory = array1 
 // jsCategory length 3
 var jsMy = array2

 var html_option = '';

 for (var i = 0; i < jsCategory.length; i++) 

 for (var z = 0; z < jsMy.length; z++) 
 if (jsCategory[i]._id == jsMy[z]._id) 
 //Correct
 html_option += '<option value=' + jsCategory[i]._id + ' selected>' + jsCategory[i].name + '</option>';
 else 
 //Not Select err
 console.log(jsCategory[i]);
 
 


document.write(html_option);

javascript

share|improve this question

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Looks like you have almost got it right. Just break out of the inner loop when you have success, after html_option += line, add break;
  
  – Programnik
  Mar 28 at 2:44
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  But what is the error?
  
  – bird
  Mar 28 at 3:06
  

  
  
  
  

add a comment | 

0

I have 2 arrays in jade, with different length sizes I just want to validate if the id is the same so that those are selected and the others are not

 // jsCategory length 6
 var jsCategory = array1 
 // jsCategory length 3
 var jsMy = array2

 var html_option = '';

 for (var i = 0; i < jsCategory.length; i++) 

 for (var z = 0; z < jsMy.length; z++) 
 if (jsCategory[i]._id == jsMy[z]._id) 
 //Correct
 html_option += '<option value=' + jsCategory[i]._id + ' selected>' + jsCategory[i].name + '</option>';
 else 
 //Not Select err
 console.log(jsCategory[i]);
 
 


document.write(html_option);

javascript

share|improve this question

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Looks like you have almost got it right. Just break out of the inner loop when you have success, after html_option += line, add break;
  
  – Programnik
  Mar 28 at 2:44
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  But what is the error?
  
  – bird
  Mar 28 at 3:06
  

  
  
  
  

add a comment | 

I have 2 arrays in jade, with different length sizes I just want to validate if the id is the same so that those are selected and the others are not

 // jsCategory length 6
 var jsCategory = array1 
 // jsCategory length 3
 var jsMy = array2

 var html_option = '';

 for (var i = 0; i < jsCategory.length; i++) 

 for (var z = 0; z < jsMy.length; z++) 
 if (jsCategory[i]._id == jsMy[z]._id) 
 //Correct
 html_option += '<option value=' + jsCategory[i]._id + ' selected>' + jsCategory[i].name + '</option>';
 else 
 //Not Select err
 console.log(jsCategory[i]);
 
 


document.write(html_option);

javascript

share|improve this question

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

 // jsCategory length 6
 var jsCategory = array1 
 // jsCategory length 3
 var jsMy = array2

 var html_option = '';

 for (var i = 0; i < jsCategory.length; i++) 

 for (var z = 0; z < jsMy.length; z++) 
 if (jsCategory[i]._id == jsMy[z]._id) 
 //Correct
 html_option += '<option value=' + jsCategory[i]._id + ' selected>' + jsCategory[i].name + '</option>';
 else 
 //Not Select err
 console.log(jsCategory[i]);
 
 


document.write(html_option);

share|improve this question

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

share|improve this question

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

edited Mar 28 at 2:37

Obsidian Age

31.2k77 gold badges2727 silver badges4848 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

asked Mar 28 at 2:36

Edinson Carranza SaldañaEdinson Carranza Saldaña

122 bronze badges

1 Answer
1

active

oldest

votes

0

It's shorter to use filter and reduce

const findById = inWhere => ( _id ) => !!inWhere.find(t => t._id === _id)

const html_option = array1
 .filter(findById(array2))
 .reduce((html, (_id, name) => 
 html += `<option value=$_id selected>$name</option>`, ''))

share|improve this answer

edited Mar 28 at 23:13

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  missing ) after argument list
  
  – Edinson Carranza Saldaña
  Mar 28 at 18:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @EdinsonCarranzaSaldaña thanks!
  
  – dehumanizer
  Mar 28 at 23:13
  

  
  
  
  

add a comment | 

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0

It's shorter to use filter and reduce

const findById = inWhere => ( _id ) => !!inWhere.find(t => t._id === _id)

const html_option = array1
 .filter(findById(array2))
 .reduce((html, (_id, name) => 
 html += `<option value=$_id selected>$name</option>`, ''))

share|improve this answer

edited Mar 28 at 23:13

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  missing ) after argument list
  
  – Edinson Carranza Saldaña
  Mar 28 at 18:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @EdinsonCarranzaSaldaña thanks!
  
  – dehumanizer
  Mar 28 at 23:13
  

  
  
  
  

add a comment | 

0

It's shorter to use filter and reduce

const findById = inWhere => ( _id ) => !!inWhere.find(t => t._id === _id)

const html_option = array1
 .filter(findById(array2))
 .reduce((html, (_id, name) => 
 html += `<option value=$_id selected>$name</option>`, ''))

share|improve this answer

edited Mar 28 at 23:13

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  missing ) after argument list
  
  – Edinson Carranza Saldaña
  Mar 28 at 18:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @EdinsonCarranzaSaldaña thanks!
  
  – dehumanizer
  Mar 28 at 23:13
  

  
  
  
  

add a comment | 

It's shorter to use filter and reduce

const findById = inWhere => ( _id ) => !!inWhere.find(t => t._id === _id)

const html_option = array1
 .filter(findById(array2))
 .reduce((html, (_id, name) => 
 html += `<option value=$_id selected>$name</option>`, ''))

share|improve this answer

edited Mar 28 at 23:13

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

const findById = inWhere => ( _id ) => !!inWhere.find(t => t._id === _id)

const html_option = array1
 .filter(findById(array2))
 .reduce((html, (_id, name) => 
 html += `<option value=$_id selected>$name</option>`, ''))

share|improve this answer

edited Mar 28 at 23:13

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges

answered Mar 28 at 4:19

dehumanizerdehumanizer

50244 silver badges1212 bronze badges