bonsanto/scalafy-arrays

A tiny library to add some functionalities to JavaScript Arrays.

scalafy-arrays

scalafy-array is a tiny library to add some functionalities to JavaScript's Arrays.

The library adds several functions to improve Arrays use in JavaScript. These functions are written in JavaScript, and all methods were tested and are compatible with Firefox and Chrome.

Setup & Installation

This library is really to install just run the next command>

bower install scalafy-arrays

After this, everything will be downloaded in your default bower's folder or bower_components. So you have to add the library your html file.

<script src="bower_components/scalafy-arrays/dist/scalafy-arrays.js"></script>

What does it add?

• count(f?) Counts the number of elements in array which satisfy a predicate (f) if f is not defined then it counts all elements.

var arr = [1, 2, 3, 4];
    
console.log(arr);    // 4
console.log(arr.count(function(e){     // 2
    return e % 2 === 0;
})); 

• diff(that) Computes the multiset difference between this array and another array.

var arr = [1, 2, 3];
    
console.log(arr.diff([1,3]));    // [2]

• distinct Finds all different elements in an array.

var arr = [1, 1, 2, 2, 3, 3];

console.log(arr.distinct());    // [1, 2, 3]

• exists Tests whether a predicate holds for at least one element of this array.

console.log(arr.exists(function(e){    // true
    return e === 2;
}));    

• filterNot Selects all elements of this array which don't satisfy a predicate. I.E. is like filter but the opposite.

var arr = [1, 2, 3, 4];

console.log(arr.filterNot(function(e){    // [1, 3]
    return e % 2 == 0;
}));

• flatMap Receives a mapping function and executes the function for every element in the array and flatten the result.

var arr = [[1, 2], [3, 4]];

console.log(a.flatMap(e){ // [2, 4, 6, 8]
    return e * 2;
});

• flatten similar to flatMap. Flattens a two-dimensional array by concatenating all its rows into a single array.

console.log(a.flatten());          // [1, 2, 3, 4] 

• forall Tests whether a predicate holds for all elements of this array.

console.log(a.forall(function(e){ // true
    return e % 1 == 0;
}));

console.log(a.forall(function(e){ // false
    return e % 5 == 0;
}));