I defined a function that can take any number of arguments but none is required:
function MyFunction() { //can take 0, 1, 1000, 10000, n arguments
//function code
}
Now i would like to write another function that call MyFunction with a variable number of arguments each time:
function Caller(n) {
var simple_var = "abc";
MyFunction() //how can i pass simple_var to MyFunction n times?
}
Thanks in advance :)
Function.apply can be used to pass an array of arguments to a function as if each element in the array had been passed as an individual argument:
function Caller(n) {
var simple_var = "abc";
// create an array with "n" copies of the var
var args = [];
for (var i = 0; i < n; ++i) {
args.push(simple_var);
}
// use Function.apply to send that array to "MyFunction"
MyFunction.apply(this, args);
}
Worth to say, argument length is limited to 65536 on webkit.
apply is used for this very situation. It will submit n arguments
.call is used to send it as an array, .apply to send it as a list of parameters.array.push() and args[args.length] - see jsperf.com/array-push-and-append-by-indexYou can use eval (I know, eval is evil).
In for loop construct string:
var myCall = "Myfunction(abc, abc, abc)";
and then pass it to eval
function Caller(n) {
var simple_var = "abc";
eval(myCall);
}
eval.