调用一个没有括号的函数javascript [英] Invoke a function without parentheses javascript
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问题描述
String.prototype.addStuff = function( ){
return this.replace(/ / g,-stuff)+-stuff
}
我被告知有一种方法可以在不使用括号的情况下在字符串上调用此函数。
任何人都知道怎么做?
我尝试在括号中包装函数声明并在最后添加一对:
String.prototype.liu =(function(){
return this.replace(/ / g,-liu)+-liu
})();
但这并不奏效:/ b /
解决方案
您可以使用 Object.defineProperty
并提供一个访问器描述符:
Object.defineProperty(String.prototype,'liu',{
get:function(){
return this.replace(/ / g,-liu)+ -liu
}
});
foo.liu
尽管我不知道你为什么'd想要这样做。
So I wrote this String function to add stuff to each word in a sentence
String.prototype.addStuff = function() {
return this.replace(/ /g, "-stuff ") + "-stuff"
}
I was told there was a way to invoke this function on a string without using parentheses. Anyone know how?
I tried wrapping the function declaration in parentheses and adding a pair to the end:
String.prototype.liu = (function() {
return this.replace(/ /g, "-liu ") + "-liu"
})();
But that didn't work :/
解决方案
You can, with Object.defineProperty
and providing an accessor descriptor:
Object.defineProperty(String.prototype, 'liu', {
get: function() {
return this.replace(/ /g, "-liu ") + "-liu"
}
});
"foo".liu
Although I don't know why you'd want to do that.
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