small readme cleanup

10 years ago · 7459362e5b
parent 3c9895e2e2
commit 7459362e5b
1 changed files with 2 additions and 5 deletions
--- a/README.md
+++ b/README.md
@ -42,12 +42,9 @@ extern crate rocksdb;
 use rocksdb::{RocksDBOptions, RocksDB, MergeOperands};

 fn concat_merge(new_key: &[u8], existing_val: Option<&[u8]>,
-    mut operands: &mut MergeOperands) -> Vec<u8> {
+    operands: &mut MergeOperands) -> Vec<u8> {
    let mut result: Vec<u8> = Vec::with_capacity(operands.size_hint().0);
-    match existing_val {
-        Some(v) => result.push_all(v),
-        None => (),
-    }
+    existing_val.map(|v| { result.push_all(v) });
    for op in operands {
        result.push_all(op);
    }