array-methods.js

var ObservArray = require("./index.js")

var slice = Array.prototype.slice

var ARRAY_METHODS = [
    "concat", "slice", "every", "filter", "forEach", "indexOf",
    "join", "lastIndexOf", "map", "reduce", "reduceRight",
    "some", "toString", "toLocaleString"
]

var methods = ARRAY_METHODS.map(function (name) {
    return [name, function () {
        var res = this._list[name].apply(this._list, arguments)

        if (res && Array.isArray(res)) {
            res = ObservArray(res)
        }

        return res
    }]
})

module.exports = ArrayMethods

function ArrayMethods(obs) {
    obs.push = observArrayPush
    obs.pop = observArrayPop
    obs.shift = observArrayShift
    obs.unshift = observArrayUnshift
    obs.reverse = require("./array-reverse.js")
    obs.sort = require("./array-sort.js")

    methods.forEach(function (tuple) {
        obs[tuple[0]] = tuple[1]
    })
    return obs
}



function observArrayPush() {
    var args = slice.call(arguments)
    args.unshift(this._list.length, 0)
    this.splice.apply(this, args)

    return this._list.length
}
function observArrayPop() {
    return this.splice(this._list.length - 1, 1)[0]
}
function observArrayShift() {
    return this.splice(0, 1)[0]
}
function observArrayUnshift() {
    var args = slice.call(arguments)
    args.unshift(0, 0)
    this.splice.apply(this, args)

    return this._list.length
}


function notImplemented() {
    throw new Error("Pull request welcome")
}