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17 lines
389 B
Go
17 lines
389 B
Go
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package utils
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// TransformIndex transforms user given index (start from 1) to array index (start from 0)
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// in safe way without panic i.e negative index or index out of range
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func TransformIndex[T any](arr []T, index int) int {
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if index <= 1 {
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// negative index
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return 0
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}
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if index >= len(arr) {
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// index out of range
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return len(arr) - 1
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}
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// valid index
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return index - 1
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}
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