Can I have a function name be an array variable?

Question

Can I have a JavaScript loop like this?

SB = new Array;

for (i = 1; i < 6; i++) {

   function SB[i]() {

         (code)

   } // end of function

} // end of for loop

I know that doesn't work but how can I make something like that? Thanks.

Andreas Louv · Accepted Answer · 2012-11-18 13:16:49Z

2

Make an anonymous function and return it to the variable.

var SB = [];
for (i=1;i<6;i++) {
    SB[i] = function() {
        //(code)
    }
}

Note that arrays in javascript is 0-indexed.

So you fetch the first item in the array using

myArray[0]

And the last using

myArray[ myArray.length - 1 ]

So i think you want to loop with i=0:

var SB = [];
for ( var i = 0; i < 5 ; i++) {
    SB[i] = function() {
        //(code)
    }
}

....

console.log(SB) // [function() {},function() {},function() {},function() {},function() {}]

Instead of:

[undefined, function() {}, function() {}, function() {}, function() {}, function() {}]

answered Nov 18, 2012 at 13:10

Andreas Louv

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Comments

user1726343 · Accepted Answer · 2012-11-18 13:10:23Z

1

var SB=[];
for (i=1;i<6;i++) {
    SB[i] = function () {
        ...
    }
}

You can now invoke it this way:

SB[1]();

answered Nov 18, 2012 at 13:10

user1726343

David G · Accepted Answer · 2012-11-18 13:16:13Z

0

Use the bracket notation:

for ( var i = 1; i < 6; i++ ) {

    SB[i] = function() {

    };

}

This attaches a function expression to the array at index i. You are allowed to call it like this:

SB[ 1 ]();
SB[ 2 ]();

// etc..

answered Nov 18, 2012 at 13:10

David G

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