Nodejs Array Insert insert( i, v )

Method Source Code

// Array.insert( index, value ) - Insert value at index, without overwriting existing keys
Array.prototype.insert = function( i, v ) {
   if (this.length == 0)
      return [v];
   if( i>=0 ) {
      var a = this.slice(), b = a.splice( i );
      a[i] = v;//from ww w. j a  v  a 2s  .c  o  m
      return a.concat( b );
   }
};

Related

1. insert(elem, pos)

   Array.prototype.insert = function(elem, pos) {
       this.splice(pos, 0, elem);
   

2. insert(element)

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

3. 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);
   };
   ...
   

4. insert(idx, item)

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