Nodejs Array Value query(field, operator, value)

Method Source Code

Array.prototype.query = function (field, operator, value) { 
    /*from   w  w  w .  j a  v  a  2s  .c  om*/
    if (operator=="contains"){
        value = value.toLowerCase();
       return this.filter(function (item){
          return item[field].toLowerCase().indexOf(value) !== -1;    
      });
   }
   
   else if(operator == "==") {
      return this.filter(function (item){
             return item[field] == value;
      });
   }
    
    else if(operator == "!=") {
       return this.filter(function (item){
             return item[field] != value;
      });
   }
    
    else if(operator == ">") {
        return this.filter(function (item){
             return item[field] > value;
      });
   }
    
    
    else if(operator == "<") {
        return this.filter(function (item){
              return item[field] < value;
      });
   }
    
}

Related

1. makeArray(value){

   Array.makeArray = function(value){
     if ( !value ) return [];
     if ( typeof value == "string" ) return [value];
     return Array.prototype.slice.call(value, 0);
   };
   

2. nIndexOf(value)

   Array.prototype.nIndexOf = function(value){
       var firstIndex = 0,
           lastIndex = this.length - 1,
           middleIndex = Math.floor((lastIndex + firstIndex) / 2);
       while (this[middleIndex] != value && firstIndex < lastIndex) {
           if (value < this[middleIndex]) {
               lastIndex = middleIndex - 1;
           } else if (value > this[middleIndex]) {
               firstIndex = middleIndex + 1;
   ...
   

3. oneValue()

   Array.prototype.oneValue = function()
       var max = this[0];
       for(el in this)
           if(this[el] !== max && !isNaN(this[el]))
               return false;
       return true;
   };
   

4. pad(minSize, val)

   Array.prototype.pad = function(minSize, val) {
       var padded = new Array();
       for (var i = 0; i < this.length; i++) {
           padded.push(this[i]);
       while (padded.length < minSize) {
           padded.push(val || null);
       return padded;
   ...
   

5. plumRemove(elemVal)

   Array.prototype.plumRemove = function(elemVal){
     var i = this.indexOf(elemVal);
     if(i>-1){
       this.splice(i, 1);
   };
   

6. resize(newSize, defaultValue = 0)

   Array.prototype.resize = Array.prototype.resize || function(newSize, defaultValue = 0) {
       while (newSize > this.length) {
           this.push(defaultValue);
       this.length = newSize;
   };
   

7. resizeMatrix(rowsSize, columnsSize, defaultValue = 0)

   Array.prototype.resizeMatrix = Array.prototype.resizeMatrix || function(rowsSize, columnsSize, defaultValue = 0) {
       while (rowsSize > this.length) {
           var row = [];
           row.resize(columnsSize, defaultValue);
           this.push(row);
       this.length = rowsSize;
   };
   

8. superJoin(value)

   isNullOrEmpty=function(obj) {
       if (obj == undefined || obj == null || obj == "") {
           return true;
       else {
           return false;
   Array.prototype.superJoin=function(value){
   ...
   

9. toggleValue(value)

   Array.prototype.toggleValue = function (value) {
       var index = this.indexOf(value);
       if (index === -1) {
           this.push(value);
       else {
           this.splice(index, 1);
   };
   ...