JavaScript | RegExp \0 Metacharacter
The RegExp \0 Metacharacter in JavaScript is used to find the NULL character. If it is found it returns the position else it returns -1.
Syntax:
/\0/
or
new RegExp("\\0")
Example 1: This example searches for the Null character in the string.
<!DOCTYPE html> < html > < head > < title > JavaScript RegExp \0 Metacharacter </ title > </ head > < body style = "text-align:center" > < h1 style = "color:green" > GeeksforGeeks </ h1 > < h2 >RegExp \0 Metacharacter</ h2 > < p >Input String: GeeksforGeeks@_123_$</ p > < button onclick = "geek()" > Click it! </ button > < p id = "app" ></ p > < script > function geek() { var str1 = "GeeksforGeeks@_123_$"; var regex4 = /\0/; var match4 = str1.search(regex4); if(match4 == -1) { document.getElementById("app").innerHTML = "No Null charcters present. "; } else { document.getElementById("app").innerHTML = "Index of Null character: " + match4; } } </ script > </ body > </ html > |
chevron_right
filter_none
Output:
Before Clicking the button:
After Clicking the button:
Example 2: This example searches the position of the NULL character in the string.
<!DOCTYPE html> < html > < head > < title > JavaScript RegExp \0 Metacharacter </ title > </ head > < body style = "text-align:center" > < h1 style = "color:green" > GeeksforGeeks </ h1 > < h2 >RegExp \0 Metacharacter</ h2 > < p >String: 123ge\0eky456</ p > < button onclick = "geek()" > Click it! </ button > < p id = "app" ></ p > < script > function geek() { var str1 = "123ge\0eky456"; var regex4 = new RegExp("\\0"); var match4 = str1.search(regex4); document.getElementById("app").innerHTML = " Index of NULL character: " + match4; } </ script > </ body > </ html > |
chevron_right
filter_none
Output:
Before Clicking the button:
After Clicking the button:
Supported Browsers: The browsers supported by RegExp \0 Metacharacter are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer