add: 检查单词是否为句中其他单词的前缀

src/string/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence.js

@@ -0,0 +1,14 @@
+/**
+ * @param {string} sentence
+ * @param {string} searchWord
+ * @return {number}
+ */
+export const isPrefixOfWord = function (sentence, searchWord) {
+  const items = sentence.split(' ')
+
+  for (const n in items) {
+    if (items[n].indexOf(searchWord) === 0) return Number(n) + 1
+  }
+
+  return -1
+}