In JavaScript, is there a shorter way to create object from a variable then below.
var d = 'something';
function map(d){
var obj = {};
obj[d] = d;
return obj;
}
well, the shortest looks like, but it is wrong as key is literal d than its value.
function wrong(d){
return {d:d}
}
I don't mind the first version, but wonder any succinct way.
thanks.
I recommend instantiating an anonymous function.
function map(d) {
return new function () {
this[d] = d;
};
}
Using an anonymous function will allow you to keep all of your property declarations in the same place to be more organized. If you need other default keys set you can add them easily:
new function () {
this[d] = d;
this.foo = 'bar';
};
Versus with an object literal you'll have declarations in two places:
obj = {
foo: 'bar'
};
obj[d] = d;
That all said, the original code is fine as-is. It's concise, readable, and maintainable.
function map(d) {
var obj = {};
obj[d] = d;
return obj;
}
o = {foo: bar}; o[fizz] = buzz;. I feel that it keeps the code tidier.
d.