Initializing an array and doing forEach() on it in one statement

Asked Dec 28 '21 at 20:13

Active Dec 28 '21 at 20:25

Viewed 18 times

Every example of forEach I can find is written like:

const arr = ['A','B','C']

arr.forEach((letter)=>{
 //do stuff
})

Is it bad practice to do it this way instead?:

;['A','B','C'].forEach((letter)=>{
 //do stuff
})

It just seems unnecessary to name a variable for the array you'll be iterating over. Also, why is the semicolon needed in order for the latter example to work?

edited Dec 28 '21 at 20:25

j08691

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asked Dec 28 '21 at 20:13

blake.vandercar

2

Sure, go ahead and do it inline if there's no use for the variable elsewhere – CertainPerformance Dec 28 '21 at 20:14
The semicolon isn't needed? – evolutionxbox Dec 28 '21 at 20:14
@evolutionxbox It's an unusual style that puts semicolons before statements instead of after statements. Needed in cases like `foo() ;['A', 'B', 'C'].something` – CertainPerformance Dec 28 '21 at 20:16
1

@CertainPerformance indeed that makes sense. In isolation it seems unnecessary – evolutionxbox Dec 28 '21 at 20:23

Initializing an array and doing forEach() on it in one statement

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