trim()

Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Removes all leading and trailing matches of the specified regular expression.

Syntax

trim(regex, source)

Learn more about syntax conventions.

Parameters

Returns

source after trimming matches of regex found in the beginning and/or the end of source.

Examples

Trim specific substring

The following example trims substring from the start and the end of the string_to_trim.

let string_to_trim = @"--https://bing.com--";
let substring = "--";
print string_to_trim = string_to_trim, trimmed_string = trim(substring,string_to_trim)

Output

Trim non-alphanumeric characters

The following example trims all non-word characters from start and end of the string.

range x from 1 to 5 step 1
| project str = strcat("-  ","Te st",x,@"// $")
| extend trimmed_str = trim(@"[^\w]+",str)

Output

Trim whitespaces

The next statement trims all spaces from start and end of the string.

let string_to_trim = @"    Hello, world!    ";
let substring = @"\s+";
print
    string_to_trim = string_to_trim,
    trimmed_string = trim(substring, string_to_trim)

Output