for i in [name, matches_total, matches_won, matches_lost]:
doSomething(i)
I tried doing this for JS but it did not work. Basically, I want it to do whatever it has to do over each of the variables. How do I do this with JS?
My attempt:
for (i in [name, matches_total, matches_won, matches_lost]){
doSomething(i);
}
JavaScript doesn't have quite the same in operator. If you are in an environment that supports forEach, it's relatively close in style (except that you define an inner anonymous function for the loop, a bit like a Python lambda:
[name, matches_total, matches_won, matches_lost].forEach(function(i) {
doSomething(i);
});
In this case (a case where you're calling a single function on each list item) you can simplify this in a way I find quite nice syntactically:
[name, matches_total, matches_won, matches_lost].forEach(doSomething);
for (var i = 0; i < list.length; ++i) {
doSomething(list[i]);
}
There are two kinds of for loops, the for-in loop designed for objects, and a three-statement for loop for (;;). Using for-in on an array is not recommended, as it traverses its prototype chain as well.
i was not the index but the last element in the array. I was traversing the array backwards. And your subsequent edit was wrong.var my_array = [name, matches_total, matches_won, matches_lost]
for (var i in my_array){
doSomething(my_array[i]);
}
