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Use case library

JWT expression editor

JWT expression parser functions

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Old Version 7

changes.mady.by.user Christian Czaia

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New Version 8

changes.mady.by.user Iheb Kharab

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Style guide

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Short description

Replaces the first substring matching a given regular expression with a given replacement.

Output Statussubtletruetitletext UI Text Box
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This function replaces the first substring matching the given regular expressionwith the given replacement.

Code Block
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titleSyntax
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replaceFirst(text, regex, replacement) #Output : Text
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titleExamples
Parser expressionDescription
Code Block
languagebash
linenumberstrue
%{replaceFirst("Hello World", "l", "_")}

This example returns:

He_lo World

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titleAdditional information

Parameters used in this function

ParameterInput (data type)Description
text

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titletext

Any given text.
regex

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titletext

A valid regular expression that grabs the substring to be replaced.
replacement

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titletext

This text will replace the first substring found by the regex.
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This function returns a

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If you want to replace all matching occurrences with the replacement, have a look at the replaceAll() function.

Parser expressionValue
Code Block
languagebash
linenumberstrue
%{replaceFirst("Hello World", "l", "_")}
He_lo World
Code Block
languagebash
linenumberstrue
%{replaceAll("Hello World", "l", "_")}
He__o Wor_d
UI Text Box
typetip

If you don't want to use a regular expression, have a look at the findReplaceFirst() function.

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Short description

Replaces the first substring matching a given regular expression with a given replacement.

Output

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titletext