trim_start()

Removes leading match of the specified regular expression.

Syntax

trim_start(regex, source)

Arguments

• regex: String or regular expression to be trimmed from the beginning of source.
• source: A string.

Returns

source after trimming match of regex found in the beginning of source.

Example

Statement bellow trims substring from the start of string_to_trim:

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

string_to_trim	trimmed_string
https://bing.com	bing.com

Next statement trims all non-word characters from the beginning of the string:

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

str	trimmed_str
- Te st1// $	Te st1// $
- Te st2// $	Te st2// $
- Te st3// $	Te st3// $
- Te st4// $	Te st4// $
- Te st5// $	Te st5// $