你最喜欢的Mootools / Prototype原生对象原型是什么?
我们Mootoolers和原型开发人员(本网站上的少数人)通常携带一个我们创建(或借用)的函数的便捷工具箱,我们在原生JavaScript对象上实现这些功能,以使我们的生活变得更加轻松。 我希望得到一个非常有用的原型函数列表,但只有在本地对象上实现的列表(即String.implement({...
in mootools))。
那么,你最喜欢什么?
PS:我将mootools和原型都包含在内,因为为一个库编写的函数很容易移植到另一个库中。
PPS:我知道原始的javascript对象的原型,我宁愿避免在这里讨论。
我继续了tj111的开始,这里是我的小增加:
Array.implement({
//calculate the sum of all integers
sum: function() {
var sum = this.reduce(function(a, b) {
return a + b;
});
return sum;
}
});
这里有一些我最喜欢的mootools。
字符串函数
String.implement({
//easy way to test if a string contains characters (input.value.isEmpty())
isEmpty : function() {
return (!this.test(/w+/));
},
//add ellipses if string length > len
ellipse : function(len) {
return (this.length > len) ? this.substr(0, len) + "..." : this;
},
//finds all indexOf occurrences
indexesOf : function(val) {
var from = 0;
var indexes = [];
while (0 <= from && from < this.length) {
var idx = this.indexOf(val, from);
if (idx >= 0) {
indexes.push(idx);
} else {
break;
}
from = idx+1;
}
return indexes;
}
});
数组函数
Array.implement({
//compare two arrays to see if they are identical
compare : function(arr, strict) {
strict = strict || false;
if (this.length != arr.length) return false;
for (var i = 0; i < this.length; i++) {
if ($type(this[i]) == "array") {
if (!this[i].compare(arr[i])) return false;
}
if (strict) {
if (this[i] !== arr[i]) return false;
} else {
if (this[i] != arr[i]) return false;
}
}
return true;
},
//remove non-unique array values
unique : function() {
for(var i = 0; i< this.length; i++) {
var keys = this.indexesOf(this[i]);
while (keys.length > 1) {
this.splice(keys.pop(), 1);
}
}
return this;
},
//same as array.unshift, except returns array instead of count
//good for using inline... array.lpush('value').doSomethingElse()
lpush : function() {
for (var i = arguments.length -1 ; i >= 0; i--){
this.unshift(arguments[i]);
}
return this;
},
//get all indexes of an item in an array
indexesOf : function(item) {
var ret = [];
for (var i = 0; i < this.length; i++) {
if (this[i] == item) ret.push(i);
}
return ret;
}
});
//taken from http://prototype.lighthouseapp.com/projects/8886/tickets/351-new-swap-method-for-elements
Element.addMethods({
swap: (function() {
if ('swapNode' in document.documentElement)
return function(element, other) {
return $(element).swapNode($(other));
};
return function(element, other) {
element = $(element);
other = $(other);
var next = other.nextSibling, parent = other.parentNode;
element.parentNode.replaceChild(other, element);
return parent.insertBefore(element, next);
};
})()
});
// extend the array object to support indexed insertions
// submitted at http://prototype.lighthouseapp.com/projects/8886-prototype/tickets/356-arrayinsert
Array.prototype.insert=function(element,where) {
var slice1=this.slice(0,where);
var slice2=this.slice(where);
return new Array.concat(slice1,element,slice2);
};
//extend the array object to support searching thrtough indexed arrays
// if returnIndex is true, then return the keyName, else return the value from that cell
Array.prototype.nextValue=function(startIndex,returnIndex) {
for(var i=startIndex+1;i<this.length;i++){
if(this[i]){
return (returnIndex?i:this[i]);
}
}
return null;
};
//extend the array object to support searching thrtough indexed arrays
// if returnIndex is true, then return the keyName, else return the value from that cell
Array.prototype.prevValue=function(startIndex,returnIndex) {
for(var i=startIndex-1;i>=0;i--){
if(this[i]){
return (returnIndex?i:this[i]);
}
}
return null;
};
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