Add BufReader.readSlice()

Original: https://github.com/denoland/deno_std/commit/e37b949e2c4523911e071086c1cf4ea4f33dc6af

1 files changed, 4 insertions, 0 deletions

diff --git a/util.ts b/util.ts
index 84ef8b5a8..d05bea8c0 100644
--- a/util.ts
+++ b/util.ts
@@ -15,3 +15,7 @@ export function copyBytes(dst: Uint8Array, src: Uint8Array, off = 0): number {
   dst.set(src, off);
   return src.byteLength;
 }
+
+export function charCode(s: string): number {
+  return s.charCodeAt(0);
+}