What is tzlib ?

It provides extension methods on javascript Array. 
Some methods are replica of linq in .Net (C#).

Function Documentation :

first()

Returns first elements of an array.

function first() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);
  console.log(numArray.first());  // This will print 3

}

last()

Returns last elements of an array.

function last() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);
  console.log(numArray.last());  // This will print 4

}

clear()

Remove all elements from an array.

function clear() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);
  console.log(numArray.clear());  // This will print []

}

where(predicate)

Returns subset of source Array that satisfies predicate.

function where() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);
  console.log(numArray.where(ele => ele > 10));  // This will print 100
  console.log(numArray.where(ele => ele === 3)); // This will print 3

}

addRange()

Returns Array which is superset of two arrays.

function addRange() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);

    const augArray = [5,6,];

  console.log(numArray.addRange(augArray));  // This will print 3,100,2,10,4,5,6

}

removeRange()

Returns first elements of an array.

function removeRange() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);

  console.log(numArray.removeRange(2,2));  // This will print 2,10

}

strictSort()

Sorts array for both number & String.

function strictSort() {
    let sArray = new Array<number>();
        sArray.push('IronMan');
        sArray.push('Thor');
        sArray.push('Captain America');
        sArray.push('Hulk');

  console.log(numArray.strictSort);  
  
  // This will print : Captain America, Hulk, IronMan, Thor

let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);

 console.log(numArray.strictSort);  
 // This will print : 2,3,4,10,100

}

orderBy(property,sortOrder?)

Returns sorted Array of objects determined by key. User has an option to select either asceding or descending order.

function orderBy(expression,sortOrder) {
    let sArray = new Array<number>();
        sArray=  [{ Name: 'Tony Stark', Alias: 'Iron Man' }, { Name: 'Robert Bruce Banner', Alias: 'Hulk' },
                  { Name: 'Steve Rojer', Alias: 'Captain America' }, { Name: 'Natasha Romanova', Alias: 'Black Widow' }];
  
  console.log(numArray.orderBy(item=>item.Name));  // Will sort array by Name property in Asc order
  console.log(numArray.orderBy(item=>item.Alias),false);  // Will sort array by Alias property in Desc order
}

insertAt(item,position)

Insert element at mentioned position.

function insertAt() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(2);
        numArray.push(10);
        numArray.push(4);
  
  console.log(numArray.insertAt(50,0,1));  // Will insert 50 at array index 1, print 3, 50, 100, 2, 10, 4
}

getMatchCount(predicate)

Returns count of number of matching element.

function getcount() {
    let numArray = new Array<number>();
        numArray.push(3);
        numArray.push(100);
        numArray.push(3);
        numArray.push(10);
        numArray.push(2);
  
  console.log(numArray.getMatchCount(ele=>ele===3));  // Will return 2.
}