Packages/slice/FindIndex

Node: arr.findIndex(fn)github.com/sahilkhaire/gox/slice

FindIndex

Overview

FindIndex returns the index of the first match, or -1 (Array.findIndex).

If you are coming from Node.js, the closest pattern is arr.findIndex(fn).

Signature

func FindIndex[T any](in []T, fn func(T) bool) int

Compare: Node.js · Standard Go · gox

Node.js

arr.findIndex(fn)

Standard Go

// Manual loop or Go 1.21+ slices package
for _, v := range items {
    // transform or filter v
}

gox

import "github.com/sahilkhaire/gox/slice"

slice.FindIndex(arr, fn)

Example

import "github.com/sahilkhaire/gox/slice"

slice.FindIndex(arr, fn)

Tips

Chain Filter, Map, and Reduce for lodash-style pipelines. Results are new slices — inputs are never mutated.

Standard library alternative

Use a for loop or Go 1.21+ slices package helpers from the standard library.

Related APIs

ChunkContainsEvery

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