Merge pull request phuocng#485 from david-luna/master

feat(string): format string like Java

snippets/string/format-a-string.md

@@ -0,0 +1,30 @@
+---
+title: Format a String (Java style)
+category: String
+---
+
+**JavaScript version**
+
+```js
+const format = (str, ...vals) => vals.reduce((s,v,i) => s.replace(new RegExp('\\{' + i + '\\}', 'g'), v), str)
+```
+
+**TypeScript version**
+
+```js
+const format = (str: string, ...vals: unknown[]): string => vals.reduce((s,v,i) => s.replace(new RegExp('\\{' + i + '\\}', 'g'), v), str);
+```
+
+**Examples**
+
+```js
+const template = 'My name is {0} and I am {1} years old';
+const name1 = 'John', age1 = 30;
+const name2 = 'Jane', age2 = 20;
+
+console.log(format(template, name1, age1));
+// output: My name is John and I am 30 years old
+
+console.log(format(template, name2, age2));
+// output: My name is Jane and I am 20 years old
+```