Answered: The following function is immediately…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

1.The following function is immediately invoked.

function f() { return 1; }

	True
	False

Expert Solution

Step 1

EXPLANATION:

A function that executes functions immediately once they are created is called Immediately-invoked Function expression. Its short form is IIFE. It is also called Iffy.

This is used to isolate the declarations of the variables and also will not pollute the global object.

SYNTAX:

(function() {
// code
})()

The IFFE should be enclosed by a parenthesis. Without this parenthesis, it's a function definition and not an expression.

Thus, the given code

function f() { return 1; }

is not an Immediately-invoked Function expression.

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