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Add elements to an array from specified position in typescript

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;

0

I am adding elements to array arr1 using map function. Is there any way to specify the index of starting position in typescript

e.g If I want to add elements from 3rd index position of the array. first two index should hold 0. how can I do that?

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

I want to add 0 from starting of the array. If I specify position as 3 then first 2 element should be zero

angular typescript

share|improve this question

edited Mar 8 at 9:44

Naresh Shetty

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you aware your code snippet doesn't work ? I don' understand what you want to do.
  
  – Florian
  Mar 8 at 9:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Florian Sorry. Updated
  
  – Naresh Shetty
  Mar 8 at 9:48
  

  
  
  
  

add a comment | 

0

I am adding elements to array arr1 using map function. Is there any way to specify the index of starting position in typescript

e.g If I want to add elements from 3rd index position of the array. first two index should hold 0. how can I do that?

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

I want to add 0 from starting of the array. If I specify position as 3 then first 2 element should be zero

angular typescript

share|improve this question

edited Mar 8 at 9:44

Naresh Shetty

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you aware your code snippet doesn't work ? I don' understand what you want to do.
  
  – Florian
  Mar 8 at 9:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Florian Sorry. Updated
  
  – Naresh Shetty
  Mar 8 at 9:48
  

  
  
  
  

add a comment | 

I am adding elements to array arr1 using map function. Is there any way to specify the index of starting position in typescript

e.g If I want to add elements from 3rd index position of the array. first two index should hold 0. how can I do that?

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

I want to add 0 from starting of the array. If I specify position as 3 then first 2 element should be zero

angular typescript

share|improve this question

edited Mar 8 at 9:44

Naresh Shetty

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: years.map(_ => 1000)
 ;
 
console.log(data.arr2);

angular typescript

angular typescript

share|improve this question

edited Mar 8 at 9:44

Naresh Shetty

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

share|improve this question

edited Mar 8 at 9:44

Naresh Shetty

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

asked Mar 8 at 9:34

Naresh ShettyNaresh Shetty

6311

2 Answers
2

active

oldest

votes

0

You can use array#map and for all index value lower than your desired index place 0 other get the value from your array.

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

share|improve this answer

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

add a comment | 

0

I'm not sure if I understood what you want :

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

share|improve this answer

answered Mar 8 at 10:19

FlorianFlorian

720412

add a comment | 

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0

You can use array#map and for all index value lower than your desired index place 0 other get the value from your array.

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

share|improve this answer

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

add a comment | 

0

You can use array#map and for all index value lower than your desired index place 0 other get the value from your array.

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

share|improve this answer

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

add a comment | 

You can use array#map and for all index value lower than your desired index place 0 other get the value from your array.

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

share|improve this answer

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

let years = [0,1,2,3,4],
 index = 2,
 result = years.map((v,i) => i < index ? 0 : v);
console.log(result);

share|improve this answer

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

answered Mar 8 at 9:39

Hassan ImamHassan Imam

12k31632

0

I'm not sure if I understood what you want :

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

share|improve this answer

answered Mar 8 at 10:19

FlorianFlorian

720412

add a comment | 

0

I'm not sure if I understood what you want :

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

share|improve this answer

answered Mar 8 at 10:19

FlorianFlorian

720412

add a comment | 

I'm not sure if I understood what you want :

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

share|improve this answer

answered Mar 8 at 10:19

FlorianFlorian

720412

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

let years = [0,1,2,3,4];

data = 
 var1: 100000,
 arr2: modifyArray(3, 100000)
 ;

console.log(data.arr2);

function modifyArray(position = 0, value) 
 const newArray = [];
 for (let i = 0; i < position - 1; i++) 
 newArray.push(0);
 
 return [...newArray, ...years.slice(0, position ), value, ...years.slice(position)];

 

share|improve this answer

answered Mar 8 at 10:19

FlorianFlorian

720412

answered Mar 8 at 10:19

FlorianFlorian

720412

answered Mar 8 at 10:19

FlorianFlorian

720412