ex-js-linq

helpful libraries for JavaScript programming

Features

• .forEach
• .select
• .selectMany
• .where
• .firstOrDefault
• .indexOf
• .groupBy
• .any
• .exists
• .sum
• .avg
• .min
• .max
• .remove
• .take
• .skip
• .orderBy
• .orderByDescending
• .toArray
• .distinct
• .add
• .addRange
• .join
• .count

Using npm

npm install ex-js-linq

Overview

var linq = require("ex-js-linq");
var sampleData = [ 
    { id: 3, name: "julia", age: 22, city: "izmir", cars: ["Fiat"] }, 
    { id: 2, name: "Marry", age: 25, city: "istanbul", cars: ["Ford"] }, 
    { id: 4, name: "julia", age: 22, city: "izmir", cars: ["Fiat"] }, 
    { id: 1, name: "John", age: 30, city: "istanbul", cars: ["Ford", "BMW", "Fiat"] }, 
    { id: 5, name: "Furkan", age: 22, city: "istanbul", cars: [] } 
];

.forEach

    new linq(sampleData).forEach(function(x){
        console.log(x);
    });

.select

    var result= new linq(sampleData)
        .select(function(x){return x.age})
        .toArray();
    // or
    var result=new linq(sampleData)
        .select(function(x){
            return {
                name:x.name,
                age:x.age
            }
        }).toArray();

.selectMany

    var result= new linq(sampleData)
        .selectMany(function(x){return x.cars})
        .toArray();
    // result => ["Fiat","Ford","Fiat",...]

.where

    var result=new linq(sampleData)
        .where(function(x){return x.age>23;})
        .toArray();

.firstOrDefault

    var result=new linq(sampleData)
        .firstOrDefault(function(x){return x.id==5;});
    // or
    var result=new linq(sampleData)
        .firstOrDefault();     

.indexOf

    var index=new linq(sampleData)
        .indexOf(function(x){return x.id==5;}); 

.groupBy

    var result=new linq(sampleData)
        .groupBy(function(x){return x.city;})
        .selectMany(function(x){
            return x.items
        }).toArray();
    // result =>[item1,item2,item3,...]
    // or
    var result=new linq(sampleData)
        .groupBy(function(x){return x.city;})
        .toArray();
    // result => [{key:"istanbul",items:[item1,item2,...]},{key:"izmir",items:[item1,item2,...]}]

.any

    var result=new linq(sampleData)
        .any(function(x){return x.id==5;}); 
    // result => true

.exists

    var result=new linq(sampleData)
        .exists(function(x){return x.id==5;}); 
    // result => true

.sum

    var result=new linq(sampleData)
        .sum(function(x){return x.age;}); 
    // or
    var result=new linq([1,2,3]).sum();
    // result => 6

.avg

    var result=new linq(sampleData)
        .avg(function(x){return x.age;}); 
    // or
    var result=new linq([1,2,3]).sum();
    // result => 2

.min

    var result=new linq(sampleData)
        .min(function(x){return x.age;}); 
    // result => 22
    // or
    var result=new linq([1,2,3]).sum();
    // result => 1

.max

    var result=new linq(sampleData)
        .min(function(x){return x.age;}); 
    // result => 30
    // or
    var result=new linq([1,2,3]).sum();
    // result => 3

.remove

    var result=new linq(sampleData)
        .remove(function(x){return x.age==22;})
        .toArray(); 

.take

    var result=new linq(sampleData)
        .take(5).toArray(); 

.skip

    var result=new linq(sampleData)
        .skip(1).take(3).toArray(); 

.orderBy

    var result=new linq(sampleData)
        .orderBy(function(x){ return x.age})
        .toArray();

.orderByDescending

    var result=new linq(sampleData)
        .orderByDescending(function(x){ return x.age})
        .toArray();

.toArray

    var result=new linq(sampleData).toArray();

.distinct

    var result=new linq(sampleData).distinct().toArray();
    // or
    var result=new linq(sampleData).distinct(function(x){ return x.id;}).toArray();

.add

    var item={};
    new linq(sampleData).add(item);

.addRange

    var items=[];
    new linq(sampleData).add(items);

.join

    var items=[];
    var result=new linq(sampleData).join(items).toArray();

.count

    var count=new linq(sampleData).count();
    // or
    var count=new linq(sampleData).count(function(x){ return x.cars.lenght>2;});