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var $A = Array.from = function(iterable) {
if (iterable.toArray) {
return iterable.toArray();
} else {
var results = [];
for (var i = 0; i < iterable.length; i++)
results.push(iterable[i]);
return results;
}
}
Object.extend(Array.prototype, Enumerable);
Object.extend(Array.prototype, {
_each: function(iterator) {
for (var i = 0; i < this.length; i++)
iterator(this[i]);
},
first: function() {
return this[0];
},
last: function() {
return this[this.length - 1];
},
compact: function() {
return this.select(function(value) {
return value != undefined || value != null;
});
},
flatten: function() {
return this.inject([], function(array, value) {
return array.concat(value.constructor == Array ?
value.flatten() : [value]);
});
},
without: function() {
var values = $A(arguments);
return this.select(function(value) {
return !values.include(value);
});
},
indexOf: function(object) {
for (var i = 0; i < this.length; i++)
if (this[i] == object) return i;
return false;
},
reverse: function() {
var result = [];
for (var i = this.length; i > 0; i--)
result.push(this[i-1]);
return result;
},
inspect: function() {
return '[' + this.map(Object.inspect).join(', ') + ']';
}
});
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