add: 只出现一次的数字等

src/string/compare-strings.js

@@ -0,0 +1,20 @@
+/**
+ * @param A: A string
+ * @param B: A string
+ * @return: if string A contains all of the characters in B return true else return false
+ */
+export const compareStrings = function (A, B) {
+  const a = A.split('')
+  const b = B.split('')
+
+  for (const n in b) {
+    const tmp = a.indexOf(b[n])
+    if (tmp === -1) {
+      return false
+    } else {
+      a.splice(tmp, 1)
+    }
+  }
+
+  return true
+}