Difference Between Beforeall and Beforeeach

By: | Updated: Aug-13, 2022
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Coding, although a part of programming, is not only about writing code. We need to think about how the code will be executed. Different programming languages support different execution modes and the programmers have to make sure that their code works well in all the execution modes.

Summary Table

Beforeall Beforeeach
executed before the block of code executed before each of the objects
is used to check once for all the conditions is used to initialize a variable once
is used only once is used to initialize a variable multiple times

Difference Between Beforeall and Beforeeach

There are so many commands and functions that come under the umbrella of pre-conditions and post-conditions. For example, if you have a program that is supposed to check whether or not the user is allowed to write a comment on a specific page, you can use a condition to check whether or not the user has access to the page. The pre-condition and post-condition checks the status of a variable, but there are also functions that perform both tasks.

In this article, we will see the difference between Beforeall and Beforeeach in the behavioral context and also see how they are used in the code.

What is Beforeall?

Beforeall is a conditional statement that is used to check once for all the conditions. It is also known as a precondition. The block of code that is to be executed first, before the main program starts, is executed.

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Let’s see an example of the Beforeall condition:

beforeAll((done) => {

What is Beforeeach?

When initializing an object, you may have a situation where you want to initialize a variable once and then initialize another variable and then again another variable. It means that it is used to initialize once and then it will be used again in the subsequent initialization.

The example below shows how to initialize the two variables in the preceding example:

beforeEach(() => {

The Similarities Between Beforeall and Beforeeach

Before we get to the differences, let’s look at the similarities between the two.

The context

Both Beforeall and Beforeeach are used in the context of execution. Beforeall is used to check for all the conditions, before the main program starts. It checks for all the conditions, before it actually starts executing.

The scope

Beforeall and Beforeeach are executed within a scope. The scope is defined by what is happening in a program and which function or block of code is being executed. Beforeall checks for all the conditions before it starts executing, but before it actually starts executing. Beforeeach checks for all the conditions before the first initialization of an object.

The name

Beforeall and Beforeeach are both preceded by the word “Before”. Beforeall is used to check for all the conditions, before the main program starts, whereas Beforeeach is used to initialize once and then initialize another variable in a subsequent initialization.

Beforeall VS Beforeeach

Now that you know the definitions of Beforeall and Beforeeach, let’s see the differences between them.

The execution

Beforeall will always be executed before the block of code.

Beforeeach will be executed before each of the objects in the initialization.

The code

Beforeall is used to check once for all the conditions.

Beforeeach is used to initialize a variable once and then again initialize another variable.

The behavior

Beforeall is used only once.

Beforeeach is used to initialize a variable multiple times.

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