app = {
echo: function(txt) {
alert(txt)
},
start: function(func) {
this.func('hello');
}
}
app.start('echo');
I need to call whatever function passed as func. How to do that? the example doesn't work for me.
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Do you have to use strings? Why can't you just pass the function to call?user395760– user3957602011-02-19 12:38:00 +00:00Commented Feb 19, 2011 at 12:38
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4 Answers
Use this[func] instead of this.func
app={
echo:function(txt){
alert(txt)
},
start:function(func){
this[func]('hello');
}
}
app.start('echo');
Comments
I guess in it's simplest form you could do:
var app =
{
echo: function(txt)
{
alert(txt);
},
start: function(func)
{
this[func]("hello");
}
};
But you could get a little smarter with the arguments:
var app =
{
echo: function(txt)
{
alert(txt);
},
start: function(func)
{
var method = this[func];
var args = [];
for (var i = 1; i < arguments.length; i++)
args.push(arguments[i]);
method.apply(this, args);
}
};
That way you can call it as app.start("echo", "hello");
1 Comment
Lukáš Novotný
You can also use arrays slice instead of manually looping through arguments array, even tho not directly
var args = Array.prototype.slice.call(arguments, 1);Try that way:
start: function(func) {
this[func]('hello');
}
Comments
start:function(func){
this[func]('hello');
}
