feat: add solutions to lc problems: No.2559 (#3918)

doocs · Jan 3, 2025 · ef0677c · ef0677c
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diff --git a/solution/2500-2599/2559.Count Vowel Strings in Ranges/README.md b/solution/2500-2599/2559.Count Vowel Strings in Ranges/README.md
@@ -306,15 +306,29 @@ func vowelStrings(words []string, queries [][]int) []int {
 ```ts
 function vowelStrings(words: string[], queries: number[][]): number[] {
     const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
-    const n = words.length;
-    const s: number[] = new Array(n + 1).fill(0);
-    for (let i = 0; i < n; ++i) {
-        if (vowels.has(words[i][0]) && vowels.has(words[i][words[i].length - 1])) {
-            s[i + 1] = s[i] + 1;
-        } else {
-            s[i + 1] = s[i];
-        }
-    }
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)!));
+        s[i + 1] = s[i] + x;
+    });
+
+    return queries.map(([l, r]) => s[r + 1] - s[l]);
+}
+```
+
+#### JavaScript
+
+```js
+function vowelStrings(words, queries) {
+    const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)));
+        s[i + 1] = s[i] + x;
+    });
+
     return queries.map(([l, r]) => s[r + 1] - s[l]);
 }
 ```

diff --git a/solution/2500-2599/2559.Count Vowel Strings in Ranges/README_EN.md b/solution/2500-2599/2559.Count Vowel Strings in Ranges/README_EN.md
@@ -304,15 +304,29 @@ func vowelStrings(words []string, queries [][]int) []int {
 ```ts
 function vowelStrings(words: string[], queries: number[][]): number[] {
     const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
-    const n = words.length;
-    const s: number[] = new Array(n + 1).fill(0);
-    for (let i = 0; i < n; ++i) {
-        if (vowels.has(words[i][0]) && vowels.has(words[i][words[i].length - 1])) {
-            s[i + 1] = s[i] + 1;
-        } else {
-            s[i + 1] = s[i];
-        }
-    }
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)!));
+        s[i + 1] = s[i] + x;
+    });
+
+    return queries.map(([l, r]) => s[r + 1] - s[l]);
+}
+```
+
+#### JavaScript
+
+```js
+function vowelStrings(words, queries) {
+    const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)));
+        s[i + 1] = s[i] + x;
+    });
+
     return queries.map(([l, r]) => s[r + 1] - s[l]);
 }
 ```

diff --git a/solution/2500-2599/2559.Count Vowel Strings in Ranges/Solution2.js b/solution/2500-2599/2559.Count Vowel Strings in Ranges/Solution2.js
@@ -0,0 +1,11 @@
+function vowelStrings(words, queries) {
+    const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)));
+        s[i + 1] = s[i] + x;
+    });
+
+    return queries.map(([l, r]) => s[r + 1] - s[l]);
+}
diff --git a/solution/2500-2599/2559.Count Vowel Strings in Ranges/Solution2.ts b/solution/2500-2599/2559.Count Vowel Strings in Ranges/Solution2.ts
@@ -1,13 +1,11 @@
 function vowelStrings(words: string[], queries: number[][]): number[] {
     const vowels = new Set(['a', 'e', 'i', 'o', 'u']);
-    const n = words.length;
-    const s: number[] = new Array(n + 1).fill(0);
-    for (let i = 0; i < n; ++i) {
-        if (vowels.has(words[i][0]) && vowels.has(words[i][words[i].length - 1])) {
-            s[i + 1] = s[i] + 1;
-        } else {
-            s[i + 1] = s[i];
-        }
-    }
+    const s = new Array(words.length + 1).fill(0);
+
+    words.forEach((w, i) => {
+        const x = +(vowels.has(w[0]) && vowels.has(w.at(-1)!));
+        s[i + 1] = s[i] + x;
+    });
+
     return queries.map(([l, r]) => s[r + 1] - s[l]);
 }