trim_start()trim_start()

• 09/30/2020
• • o
  • v

删除指定正则表达式的前导匹配项。Removes leading match of the specified regular expression.

语法Syntax

trim_start(regex, text)trim_start(regex, text)

参数Arguments

• regex：要从 text 的开头修剪的字符串或正则表达式。regex : String or regular expression to be trimmed from the beginning of text .
• text ：一个字符串。text : A string.

返回Returns

修剪 text 开头的 regex 匹配项后的 text。text after trimming match of regex found in the beginning of text .

示例Example

以下语句从 string_to_trim 的开头修剪 substring：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)

下一条语句从字符串的开头修剪所有非单词字符：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)