How to use regular expressions\ d metacharacters

I would like to share with you how to use the regular expression\ d metacharacters. I believe most people don't know much about it, so share this article for your reference. I hope you will learn a lot after reading this article. Let's learn about it!

Regular expression\ d metacharacter:

\ d metacharacters can match numeric characters, which is equivalent to "[0-9]".

Grammatical structure:

Constructor mode:

New RegExp (\\ d)

Object direct quantity method:

/\ d /

Browsers support:

IE browsers support this metacharacter.

Firefox browser supports this metacharacter.

Google browser supports this metacharacter.

Example code:

Example 1:

Var str= "I love antzone\ n and you 360"; var reg=new RegExp ("\\ d", "g"); console.log (str.match (reg))

The above code matches all the numbers in the string.

Example 2:

Var str= "I love antzone\ n and you 360"; var reg=/\ ddebase g; console.log (str.match (reg))

The function of this code is the same as the above code.

And in many cases, for example, in many cases, the code we copy has a number at the front, and if there are numbers in front of hundreds of lines of code, we can replace them with rules.

For example:

1 alert ("); 2 var str=" I love antzone\ n and you 360 "; 3 var reg=/\ d G; 4console.log (str.match (reg))

For example, the following rule

^ [0-9] *.

You can perfectly replace the previous number.

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