[英]What do square brackets after function call mean?
I'm trying to understand the purpose of the [0] in the function call I came across and what value is returned to x?我试图了解我遇到的 function 调用中 [0] 的用途以及返回给 x 的值是多少?
x = my_function(var1, var2)[0];
function my_function(v1, v2){
var v3, v4
v3 = v1 * 3;
v4 = v2 * 7;
return( [v3, v4] );
}
They mean that the function returns an array and you only need the first element of that array.他们的意思是 function 返回一个数组,您只需要该数组的第一个元素。
return is not a function, by the way.顺便说一句,return 不是 function。 You don't need the parenthesis.
你不需要括号。
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