问题找到了var Hash = {
_each: function(iterator) {
for (key in this) { //这里 如果key是 "member",value将得到一个函数对象,而不是期望的值1
var value = this[key];
//所以下面这句将被执行
if (typeof value == 'function' ) continue;
var pair = [key, value];
pair.key = key;
pair.value = value;
iterator(pair);
}
},
member 是Enumerable的一个方法Object.extend(Enumerable, {
map: Enumerable.collect,
find: Enumerable.detect,
select: Enumerable.findAll,
member: Enumerable.include,
entries: Enumerable.toArray
});而他,则把这个方法塞给了哈希对象function $H(object) {
var hash = Object.extend({}, object || {});
Object.extend(hash, Enumerable);
Object.extend(hash, Hash);
return hash;
}
_each: function(iterator) {
for (key in this) { //这里 如果key是 "member",value将得到一个函数对象,而不是期望的值1
var value = this[key];
//所以下面这句将被执行
if (typeof value == 'function' ) continue;
var pair = [key, value];
pair.key = key;
pair.value = value;
iterator(pair);
}
},
member 是Enumerable的一个方法Object.extend(Enumerable, {
map: Enumerable.collect,
find: Enumerable.detect,
select: Enumerable.findAll,
member: Enumerable.include,
entries: Enumerable.toArray
});而他,则把这个方法塞给了哈希对象function $H(object) {
var hash = Object.extend({}, object || {});
Object.extend(hash, Enumerable);
Object.extend(hash, Hash);
return hash;
}
function $H(object) {
var hash = Object.extend({}, object || {});
Object.extend(hash, Enumerable); // member属性被Enumerable对同名属性的重写了
Object.extend(hash, Hash);
return hash;
}
return之前加个断点可以看到member的属性是:
hash.member
{...}
bindAsEventListener: {...}
bind: {...}
Enumerable
{...}
each: {...}
all: {...}
any: {...}
collect: {...}
detect: {...}
findAll: {...}
grep: {...}
include: {...}
inject: {...}
invoke: {...}
max: {...}
min: {...}
partition: {...}
pluck: {...}
reject: {...}
sortBy: {...}
toArray: {...}
zip: {...}
inspect: {...}
map: {...}
find: {...}
select: {...}
member: {...}
entries: {...}