Nodejs Array Insert insert(index)

Method Source Code

// Inserts an element or elements at a given index
// Example fo inserting an Array into `this` Array: [].insert(0, [[]])

Array.prototype.insert = function(index) {

    function isArray(instance) {
        return Object.prototype.toString.call(instance) !== '[object Array]';
    }/* w  w  w  .  java2 s  .c  om*/

    // Prototypes throw TypeErrors when the context or arguments are invalid

    if (!isArray(this)) {
        throw new TypeError("`this` must be Array, not " + typeof this);
    }

    if (typeof index !== 'number') {
        throw new TypeError("arguments[0] must be number (index to insert at), not " + typeof arguments[0]);
    }

    if (typeof arguments[1] === 'undefined') {
        throw new TypeError("arguments[1] must be element or Array of elements to insert, not " + typeof arguments[1]);
    }

    Array.prototype.splice.call(this, [index, 0].concat(
        isArray(arguments[1]) ? arguments[1] : [arguments[1]]
    ));

    return this;
};

Related

1. insert(element)

   Array.prototype.insert = function(element) {
     if (this.indexOf(element) === -1) {
       this.push(element);
     return this;
   };
   

2. insert(i, ob)

   Array.prototype.insert = function(i, ob) {
       i = i - 1;
       if (i < 0)i = 0;
       if (i > this.length)i = this.length;
       var st = (i == 0) ? [] : this.slice(0, i);
       st.push(ob);
       var ed = (i >= this.length) ? [] : this.slice(i);
       return st.concat(ed);
   };
   ...
   

3. insert(idx, item)

   Array.prototype.insert = function(idx, item) {
     this.splice(idx, 0, item);
   };
   

4. insert(index , item)

   Array.prototype.insert = function(index , item){
       this.splice(index, 0, item);
   };
   

5. insert(index)

   Array.prototype.insert = function(index) {
       this.splice.apply(this, [index, 0].concat(
           Array.prototype.slice.call(arguments, 1)));
       return this;
   };
   

6. insert(index, item)

   Array.prototype.insert = function (index, item) {
     if (index)
       this.splice(index, 0, item);
     else
       this.push(item);
   };
   

7. insert(index, item)

   Array.prototype.insert = function (index, item) {
     this.splice(index, 0, item);
   

8. insert(index, item)

   Array.prototype.insert = function(index, item) {
     this.splice(index, 0, item);
     return this;
   };
   

9. insert(index, item)

   Array.prototype.insert = function(index, item) {
     this.splice(index, 0, item);
     return this;
   if (Function.prototype.name === undefined){
     Object.defineProperty(Function.prototype,'name',{
       get: function(){
         return /function ([^(]*)/.exec( this+"" )[1];
     });