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About
How to help Ukraine
Pet peeves:
- Images posted instead of text.
- Using
.map()
(or any other array iteration method like.filter
, etc), in JavaScript for simply going through the array instead of.forEach()
or a loop`. In general, use the array methods for their purpose:.map
- I have an array, I need another array where each item is based on the first one.flatMap
- like.map
but I use it when each new item also an array.filter
- I have an array, I need less of it.find
- I have an array, I need one item from it.findIndex
- I have an array, I need the index of an item.some
- I have an array, I need to check if at least one item passes a check.every
- I have an array, I need to see if all items pass a check.forEach
- I have an array, I need to do something with each item. Usually I don't want to return anything.reduce
/.reduceRight
- I have an array, I need to make it into "one value". I'll have to check if I really need to use reduce for thisfor
,for..in
,for..of
,while
,do..while
loops if the problem can't (or doesn't need to) fit into one of the above
- Using regular expressions for doing "something with text" instead of parsing, simple string manipulation, basic arithmetic, etc.
- Generating code as string
- XY problems
- "Quotes that are not quotes"
- Unformatted code
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javascriptNov 6, 2020
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ecmascript-6Jul 26, 2022
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GuideJun 6
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typescriptMay 18, 2021
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