将参数传递给添加到列表的函数

Question

In below code I'm attempting to add a function test to an Array. The function test contains a parameter param1 :

var param1 = "param1"

var fArr = []
fArr.push(test(param1));

for (var i = 0; i < fArr.length; i++) {
  fArr[i](param)
}

function test(param){
  console.log('param is '+param)
}

When I run this code I receive error :

Uncaught ReferenceError: param is not defined

How can I pass a parameter to the function that is added to array fArr ?

Answer 1

You're not adding a function to the array. You're calling the function, and adding what it returns to the array. But the function doesn't return anything, so you're pushing undefined onto the array.

What I think you want is:

var param1 = "param1";

var fArr = [];
fArr.push(function() {
    test(param1));
});

for (var i = 0; i < fArr.length; i++) {
  fArr[i]();
}

function test(param){
  console.log('param is '+param);
}

PS Get out of the bad habit of omitting ; at the end of statements.

Answer 2

The error is here: fArr[i](param) . You never initialized variable param . Are you sure you do not want to use param1 ?