update snippets to new style

snippets/sdbm.md

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+### sdbmHashAlgorithm
+
+This algorithm is a simple hash-algorithm that hashes it input string `s` into a whole number.
+
+Use `split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
+
+``` js
+const sdbm = str => {
+  let arr = str.split('');
+  return arr.reduce((hashCode, currentVal) =>
+    hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16)  - hashCode
+  ,0)
+}
+```
+
+```js
+console.log(sdbm("name")) // -3521204949
+console.log(sdbm("age")) // 808122783
+```