peela

Peela

Peela, a tiny (LIFO) Stack.

If you need a fast (FIFO) Queue, try Train.

Install

$ npm install peela [-g]
// clone repo
$ git clone [e-mail]:rootslab/peela.git

require

var Peela = require( 'peela' );

See examples.

Run Tests

$ cd peela/
$ npm test

Constructor

Create an instance, optionally with an Array of elements.

Peela( [ Array elements ] )
// or
new Peela( [ Array elements ] )

Properties

// an array representing the stack.
Peela.stack : Array

Methods

Arguments within [ ] are optional.

/*
 * Push one or multiple objects into the stack. it uses
 * the same signature as Array#push.
 * It returns the current number of items.
 */
Peela#push( [ Object obj1 [, Object obj2 .. ] ] ) : Number
 
/*
 * Concatenate an Array to the stack head, optionally reversing it
 * before the operation.
 * It returns the current Peela instance.
 *
 * NOTE: It accepts a single argument, that could be also
 * a generic element.
 * NOTE: the action of reversing the array to concatenate, could be
 * useful if you want to re-push ( previously popped ) K items into
 * the stack, for example, try:
 * var p = Peela( [ 0, 1, 2, 3, 4 ] );
 * p.concat( p.pop( 3 ), true )
 */
Peela#concat( [ Array array [, Boolean reverse ] ] ) : Peela
 
/* 
 * Evict one or multiple elements, if a number k was specified,
 * it returns an array of K elements, with K <= k.
 * If k > size(), all elements are returned.
 *
 * NOTE: #pop() a single element from the stack, it does not
 * return an Array, but the element itself.
 * NOTE: For popping all elements you could also do Peela#pop( Infinity )
 */
Peela#pop( [ Number k ] ) : Array
 
/*
 * Get the head element or an element at a certain index.
 */
Peela#head( [ Number index ] ) : Object
 
/*
 * Get an element starting from the tail.
 */
Peela#tail( [ Number index ] ) : Object
 
/*
 * Get the stack size.
 */
Peela#size() : Number
 
/*
 * Return the index of an element in the stack, optionally
 * starting the search from an offset index.
 * If element was not found, it returns -1.
 */
Peela#indexOf( Object el [, Number offset ] ) : Object
 
/*
 * Empty the stack for default.
 * If bool is set to false, no action will be done.
 * It returns the number of elements evicted.
 */
Peela#flush( [ Boolean bool ] ) : Number
 

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MIT License

Copyright (c) 2013-present < Guglielmo Ferri : [e-mail] >

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.