I am trying to do...
a=['a',2,3];
a+=function(){return 'abc'};
console.log(a[3]);
Ergo I want to a.push() in a shorthand way.
Is there any kind of operator that will allow me to do this?
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5 Answers
No - and in any case, there's nothing wrong with:
var a = ['a', 'b', 'c'];
a.push('d');
If you want to push a return value:
a.push((function() { return 'e'; })());
Comments
a.push(value) is the shorthand way haha. The other way is a[a.length] = value
1 Comment
rakslice
That may not seem much shorter, but if you're doing it with
aReallyReallyLongVariableName, not having to (mis)type it twice is convenient.You can't do operator overloading as far as I know, so that isn't possible.
Comments
You can convert your string to an array using .split():
'123'.split('');
And then use .concat() to append the results:
a = a.concat( '123'.split() )
Of course, you can always wrap this up inside a function if you so desire.
Comments
No, ES5 getter-setters allow you to intercept assignments = but there is no operator overloading to allow intercepting and reinterpreting + or +=.
If you knew the content being added was a single primitive value, you could fake it.
var appendable = {
x_: [1, 2],
get x() { return this.x_; },
set x(newx) { this.x_.push(newx.substring(("" + this.x_).length)); }
};
alert(appendable.x);
appendable.x += 3;
alert(appendable.x); // alerts 1,2,3 not 1,23
alert(appendable.x.length);
but really, .push is the best way to push content onto the end of an array.
