在字符串的开头和结尾添加一个字符

Question

I am using a platform which uses a JavaScript-like syntax and allows to convert my values using regex.

I need to add a single quote at the beginning and at the end of a string, the string will always have 9 characters.

Ie:

123456789 should be converted to '123456789'

What expression should I use?

Answer 1

You don't need a regular expression.

str = "123456789";

str = "'" + str + "'";

Answer 2

Although this question was asked a little early, newly defined backticks standard called Template Literals from ES6 provides new possibility to solve this question with a simpler syntax:

const str = '123456789';
const wrapped = `'${str}'`;

Answer 3

If its like Javascript you can do something like...

var myString = "'" + oldString + "'";

Where oldString is your 123456789

Answer 4

 str = "123456789"; str = str.replace(/^/,"'").replace(/$/,"'") console.log(str)

Answer 5

You can use literal \ \'123456789\'.

Answer 6

Why not just coerce to a String type:

var strValue = String(123456789);

Answer 7

Alternatively using lodash _.pad .

 var str = '123456789'; console.log(_.pad(str, 11, '\''));

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>