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Can't perform any operations over object in javascript

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0

I have two functions as given below. getRawData() and getBTRawData()

1. getBTRawData() just gets the data from Bluetooth from a phone


2. getRawData() gets the return value from getBTRawData() and tries to iterate over but that doesn't seem to work. I'm able to print the value inside a promise but I can't perform any functions on it.

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

Any help is greatly appreciated. Thank you.

javascript angular typescript bluetooth rxjs

share|improve this question

edited Mar 22 at 3:46

Abubakar Saad

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Not sure what could be going wrong...I stubbed getBTRawData to resolve to an array of Uint8Array's and getBTRawData worked fine
  
  – brian-lives-outdoors
  Mar 22 at 4:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yea, getBTRawData does return an array of Uint8Arrays but I can't loop over the result, which I don't understand why
  
  – Abubakar Saad
  Mar 22 at 4:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What happens? Can you see that item is an array of Uint8Arrays in the then callback? (Does your console.log("Item in this one: ", item); print anything?)
  
  – brian-lives-outdoors
  Mar 22 at 4:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (oh, and my bad...I meant to say getRawData worked fine in my first comment)
  
  – brian-lives-outdoors
  Mar 22 at 4:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yea, it prints Array of Uint8Arrays but I can't seem to loop over. The loop won't execute at all.
  
  – Abubakar Saad
  Mar 22 at 4:30
  

  
  
  
  

 | 
show 4 more comments

0

I have two functions as given below. getRawData() and getBTRawData()

1. getBTRawData() just gets the data from Bluetooth from a phone


2. getRawData() gets the return value from getBTRawData() and tries to iterate over but that doesn't seem to work. I'm able to print the value inside a promise but I can't perform any functions on it.

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

Any help is greatly appreciated. Thank you.

javascript angular typescript bluetooth rxjs

share|improve this question

edited Mar 22 at 3:46

Abubakar Saad

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Not sure what could be going wrong...I stubbed getBTRawData to resolve to an array of Uint8Array's and getBTRawData worked fine
  
  – brian-lives-outdoors
  Mar 22 at 4:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yea, getBTRawData does return an array of Uint8Arrays but I can't loop over the result, which I don't understand why
  
  – Abubakar Saad
  Mar 22 at 4:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What happens? Can you see that item is an array of Uint8Arrays in the then callback? (Does your console.log("Item in this one: ", item); print anything?)
  
  – brian-lives-outdoors
  Mar 22 at 4:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (oh, and my bad...I meant to say getRawData worked fine in my first comment)
  
  – brian-lives-outdoors
  Mar 22 at 4:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yea, it prints Array of Uint8Arrays but I can't seem to loop over. The loop won't execute at all.
  
  – Abubakar Saad
  Mar 22 at 4:30
  

  
  
  
  

 | 
show 4 more comments

I have two functions as given below. getRawData() and getBTRawData()

1. getBTRawData() just gets the data from Bluetooth from a phone


2. getRawData() gets the return value from getBTRawData() and tries to iterate over but that doesn't seem to work. I'm able to print the value inside a promise but I can't perform any functions on it.

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

Any help is greatly appreciated. Thank you.

javascript angular typescript bluetooth rxjs

share|improve this question

edited Mar 22 at 3:46

Abubakar Saad

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

getRawData() 

 const result = this.getBTRawData().then((item) => 
 console.log("Item in this one: ", item);
 let flatten = [];
 for(let i in item) 
 console.log("something here");
 flatten.push(...item[i]);
 

 console.log(flatten);

 ).catch(err => 
 console.log(err);
 );

 

 async getBTRawData() 
 let result = [];
 const res = await this.bluetoothSerial.subscribeRawData().subscribe((data) => 
 //console.log("raw data");
 // console.log(data);
 var buffer = new Uint8Array(data);
 //this.raw_data_c.push(buffer);
 result.push(buffer);
 //console.log(this.raw_data_c);).map(
 // console.log(result);
 );

 return result;
 

javascript angular typescript bluetooth rxjs

javascript angular typescript bluetooth rxjs

share|improve this question

edited Mar 22 at 3:46

Abubakar Saad

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

share|improve this question

edited Mar 22 at 3:46

Abubakar Saad

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

asked Mar 22 at 3:39

Abubakar SaadAbubakar Saad

73110

1 Answer
1

active

oldest

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0

getBTRawData seems to be returning an array, not a Promise. You should be able to directly work with the data from getBTRawData inside getRawData (assuming everything else works).

share|improve this answer

answered Mar 22 at 3:47

miyumiyu

2347

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've changed that but when I try to flatten it, it returns empty array and console for the result becomes object: __zone_symbol__state: true __zone_symbol__value: Array(52) 0: Uint8Array [84] 1: Uint8Array(5) [82, 85, 69, 13, 10]
  
  – Abubakar Saad
  Mar 22 at 4:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It seems like you just need to get rid of those __zone_symbol__* keys in the object and then you should be able to iterate over it
  
  – miyu
  Mar 22 at 4:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  but ____zone_symbol__* is basically indicating its promise, right?
  
  – Abubakar Saad
  Mar 22 at 4:38
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Not too sure about the details of your bluetooth library, so you might be right in which case I don't really know whats happening, sorry! If you print the data in __zone_symbol__value is it what you expect at least?
  
  – miyu
  Mar 22 at 4:45
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No worries, thanks for the help. Yes, the data is exactly what I expect.
  
  – Abubakar Saad
  Mar 22 at 4:49
  

  
  
  
  

add a comment | 

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0

getBTRawData seems to be returning an array, not a Promise. You should be able to directly work with the data from getBTRawData inside getRawData (assuming everything else works).

share|improve this answer

answered Mar 22 at 3:47

miyumiyu

2347

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've changed that but when I try to flatten it, it returns empty array and console for the result becomes object: __zone_symbol__state: true __zone_symbol__value: Array(52) 0: Uint8Array [84] 1: Uint8Array(5) [82, 85, 69, 13, 10]
  
  – Abubakar Saad
  Mar 22 at 4:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It seems like you just need to get rid of those __zone_symbol__* keys in the object and then you should be able to iterate over it
  
  – miyu
  Mar 22 at 4:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  but ____zone_symbol__* is basically indicating its promise, right?
  
  – Abubakar Saad
  Mar 22 at 4:38
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Not too sure about the details of your bluetooth library, so you might be right in which case I don't really know whats happening, sorry! If you print the data in __zone_symbol__value is it what you expect at least?
  
  – miyu
  Mar 22 at 4:45
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No worries, thanks for the help. Yes, the data is exactly what I expect.
  
  – Abubakar Saad
  Mar 22 at 4:49
  

  
  
  
  

add a comment | 

0

getBTRawData seems to be returning an array, not a Promise. You should be able to directly work with the data from getBTRawData inside getRawData (assuming everything else works).

share|improve this answer

answered Mar 22 at 3:47

miyumiyu

2347

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I've changed that but when I try to flatten it, it returns empty array and console for the result becomes object: __zone_symbol__state: true __zone_symbol__value: Array(52) 0: Uint8Array [84] 1: Uint8Array(5) [82, 85, 69, 13, 10]
  
  – Abubakar Saad
  Mar 22 at 4:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It seems like you just need to get rid of those __zone_symbol__* keys in the object and then you should be able to iterate over it
  
  – miyu
  Mar 22 at 4:36
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  but ____zone_symbol__* is basically indicating its promise, right?
  
  – Abubakar Saad
  Mar 22 at 4:38
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Not too sure about the details of your bluetooth library, so you might be right in which case I don't really know whats happening, sorry! If you print the data in __zone_symbol__value is it what you expect at least?
  
  – miyu
  Mar 22 at 4:45
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No worries, thanks for the help. Yes, the data is exactly what I expect.
  
  – Abubakar Saad
  Mar 22 at 4:49
  

  
  
  
  

add a comment | 

getBTRawData seems to be returning an array, not a Promise. You should be able to directly work with the data from getBTRawData inside getRawData (assuming everything else works).

share|improve this answer

answered Mar 22 at 3:47

miyumiyu

2347

share|improve this answer

answered Mar 22 at 3:47

miyumiyu

2347

answered Mar 22 at 3:47

miyumiyu

2347

answered Mar 22 at 3:47

miyumiyu

2347