resumeTechnology
Array.isArray(): is the value array
typeof does not distinguish arrays from ordinary objects.
Published22 Oct 2026
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with(): replacing one item in a copy
The index indicates which place to get the new value.
Published22 Oct 2026
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toReversed(): reverse order in a new array
Reversing is not sorting by date or value.
Published22 Oct 2026
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toSorted(): a sorted copy that preserves the original order
The method is appropriate when the original arrangement is still needed.
Published22 Oct 2026
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splice(): change the array itself
The returned array contains the removed elements.
Published22 Oct 2026
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slice(): copy of selected part
The final index does not enter the copied part.
Published22 Oct 2026
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join(): turning a list into text with a chosen separator
The method returns a string and does not add a separator after the last item.
Published22 Oct 2026
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flatMap(): from one record to zero or several
The transformation and removal of one nested level occur together.
Published22 Oct 2026
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flat(): how many levels to remove
The flattening has a set depth and returns a new array.
Published22 Oct 2026
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findLast(): last match in array
The search starts at the end and returns the value, not the index.
Published22 Oct 2026
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findIndex(): zero is a valid result
The method returns a position, and in the absence of a match -1.
Published22 Oct 2026
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at(): the last element without index calculus
The negative index counts from the end of the array.
Published22 Oct 2026