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IIFE Immediately Invoked Function Expression within a function

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Mark Kithinji answered on July 1, 2022 Popularity 5/10 Helpfulness 1/10

answer IIFE Immediately Invoked Function Expression within a function

related What are Immediately Invoked Function Expressions (IIFEs)?

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IIFE Immediately Invoked Function Expression within a function

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function myFunc()
    {
        console.log("Welcome to");
        // This will be executed after executing the previous log.
        (function() { console.log("GeeksForGeeks!"); })();
        console.log("Hi There!");
    }
      
    // Calling the Function.
    myFunc();

An IIFE within a function only runs when the parent funtion is called

Popularity 5/10 Helpfulness 1/10 Language javascript

Source: www.geeksforgeeks.org

Tags: function function-expression iife javascript

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Contributed on Feb 19 2023

Mark Kithinji

0 Answers Avg Quality 2/10

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What are Immediately Invoked Function Expressions (IIFEs)?

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// IIFE is another function expression notation (explicitly an anonymous function)
// that works in isolation and is independent of any other code.
// It gets invoked immediately where it is defined.

// The syntax is as follows:

(function (){
	//function body
})();


// A use case of IIFE would be to enclose a variable that you may likely not use again inside your code.
// So, as soon as the function is executed, the variable ceases to exist.

Popularity 7/10 Helpfulness 2/10 Language javascript

Source: www.freecodecamp.org

Tags: javascript

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Contributed on Jul 01 2022

OHIOLee

0 Answers Avg Quality 2/10

Immediately Invoked Function Expression (IIFE)

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function celebrityIDCreator (theCelebrities) {
    var i;
    var uniqueID = 100;
    for (i = 0; i < theCelebrities.length; i++) {
        theCelebrities[i]["id"] = function (j)  { // the j parametric variable is the i passed in on invocation of this IIFE
            return function () {
                return uniqueID + j; // each iteration of the for loop passes the current value of i into this IIFE and it saves the correct value to the array
            } () // BY adding () at the end of this function, we are executing it immediately and returning just the value of uniqueID + j, instead of returning a function.
        } (i); // immediately invoke the function passing the i variable as a parameter
    }

    return theCelebrities;
}

var actionCelebs = [{name:"Stallone", id:0}, {name:"Cruise", id:0}, {name:"Willis", id:0}];

var createIdForActionCelebs = celebrityIDCreator (actionCelebs);

var stalloneID = createIdForActionCelebs [0];
console.log(stalloneID.id); // 100

var cruiseID = createIdForActionCelebs [1];console.log(cruiseID.id); // 101

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: javascriptissexy.com

Tags: javascript function-expression

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Contributed on Jul 26 2023

Rasaal Ahmad

0 Answers Avg Quality 2/10

IIFE Immediately Invoked Function Expression within a function

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IIFE Immediately Invoked Function Expression within a function

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What are Immediately Invoked Function Expressions (IIFEs)?

Immediately Invoked Function Expression (IIFE)

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