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Diffstat (limited to 'src/bytes/bytes.go')
| -rw-r--r-- | src/bytes/bytes.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/bytes/bytes.go b/src/bytes/bytes.go index 60de451504..b86824087e 100644 --- a/src/bytes/bytes.go +++ b/src/bytes/bytes.go @@ -138,6 +138,16 @@ func LastIndex(s, sep []byte) int { return -1 } +// LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s. +func LastIndexByte(s []byte, c byte) int { + for i := len(s) - 1; i >= 0; i-- { + if s[i] == c { + return i + } + } + return -1 +} + // IndexRune interprets s as a sequence of UTF-8-encoded Unicode code points. // It returns the byte index of the first occurrence in s of the given rune. // It returns -1 if rune is not present in s. |