Revisions to How can I insert an item into an array at a specific index?

adjust indentation

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edit approved Jun 13, 2022 at 21:50

reputation score 1414
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I like a little safety and I use this:

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item item);
    }
    
    
   var t = ["a", "b"]
   
   t.Insert("v", 1)
    
    console.log(t )

I like a little safety and I use this:

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

I like a little safety and I use this:

Array.prototype.Insert = function (item, before) {
  if (!item) return;
  if (before == null || before < 0 || before > this.length - 1) {
    this.push(item);
    return;
  }
  this.splice(before, 0, item);
}


var t = ["a", "b"]

t.Insert("v", 1)

console.log(t)

Active reading [<https://www.youtube.com/watch?v=1Dax90QyXgI&t=17m54s>]. In English, the subjective form of the singular first-person pronoun, "I", is capitalized, along with all its contractions such as I'll and I'm.

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edited Aug 13, 2021 at 14:40

Peter Mortensen

reputation score 30948
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iI like a little safety and iI use this:

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

i like little safety and i use this

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

I like a little safety and I use this:

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

edited body

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edited Oct 8, 2020 at 22:46

hossein sedighian

reputation score 2210
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1 gold badge
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22 bronze badges

i like little safety and i use typescriptthis

 Array.prototype.Insert = function (item: any, before: number) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(item, 0, before);
    }

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

i like little safety and i use typescript

 Array.prototype.Insert = function (item: any, before: number) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(item, 0, before);
    }

i like little safety and i use this

   Array.prototype.Insert = function (item, before) {
        if (!item) return;
        if (before == null || before < 0 || before > this.length - 1) {
            this.push(item);
            return;
        }
        this.splice(before, 0,item );
    }
    
    
   var t = ["a","b"]
   
   t.Insert("v",1)
    
    console.log(t )

Post Undeleted by hossein sedighian

occurred Oct 8, 2020 at 22:46

Post Deleted by hossein sedighian

occurred Oct 8, 2020 at 22:40

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answered Oct 8, 2020 at 22:26

hossein sedighian

reputation score 2210
1
1 gold badge
17
17 silver badges
22
22 bronze badges

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