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Coerce findLastIndex and lastIndexOf fromIndex parameter to integer (#4440)

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* Enable lastIndexOf, findLast and findLastIndex

* Coerce findLastIndex fromIndex parameter to integer

* Coerce lastIndexOf fromIndex parameter to integer
This commit is contained in:
Luiz Américo
2019-08-24 13:44:00 -03:00
committed by John-David Dalton
parent ed4b3a2ddb
commit 3ebb38d389
4 changed files with 15 additions and 4 deletions
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2
lastIndexOf.js
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@@ -1,6 +1,7 @@
import baseFindIndex from './.internal/baseFindIndex.js'
import baseIsNaN from './.internal/baseIsNaN.js'
import strictLastIndexOf from './.internal/strictLastIndexOf.js'
import toInteger from './toInteger.js'
/**
* This method is like `indexOf` except that it iterates over elements of
@@ -28,6 +29,7 @@ function lastIndexOf(array, value, fromIndex) {
}
let index = length
if (fromIndex !== undefined) {
index = toInteger(fromIndex)
index = index < 0 ? Math.max(length + index, 0) : Math.min(index, length - 1)
}
return value === value