Array::indexOfArr

Array::indexOfArr.js

Array.prototype.indexOfArr = function(search) {
    var found = -1;
    this.some(function(v, x) {
        if(search.length > this.length - x) {
            return true;
        }
        found = x;
        this.some.call(search, function(sv, y) {
            if(sv !== this[x+y]) {
                found = -1;
                return true;
            }
        }, this);
        return found !== -1
    }, this);
    return found 
};

Array::indexOfArr.ls

Array::indexOfArr = (search) ->
    found = -1
    @some (v, x) ~>
        return true if search.length > this.length - x
        
        found := x
        
        @some.call search, (sv, y) ~>
            if sv isnt @[x+y]
                found := -1
                yes
        
        found isnt -1
    found

usage.js

[1,2,3,4,5,6,7,8,9,10].indexOfArr([3,4,5,6]) // => 2
[1,2,3,4,5,6,7,8,9,10].indexOfArr([3,4,6]) // => -1