The variable string is updated with the output from the compose action.

Inside the loop, a compose action called “removeCharacter” uses the replace function to remove the character in the current iteration of the loop.

An apply to each loop is created using the array RemovalChars as it’s basis.A compose action called RemovalChars is created, which is an array of characters that you’d like to be removed.A variable called string is defined which contains the complete string including the invalid characters.This will convert the array back into a string which we can then use in further actions within the Flow. We can rebuild the string with a simply compose action containing the expression: join(body('RemoveUnwanted'), '') Now that we have an array of characters with all of the unwanted characters removed. Note how the final character which was an exclamation mark has become an empty string. If I wanted to remove the exclamation marks I would specify the Unwanted Characters compose action as: Īnd the select action would produce the following output: The Select action expects it’s input to be an array, which we have provided using the range expression. If it is not in the array to be removed, then it is simply output as is, if it is found, then an empty string is output instead. This if expression checks through each character of the string and checks to see if that character is contained within the array of characters to be removed. Substring(outputs('String_To_Modify'), item(), 1) In the map section of the select action the expression used is: ifĬontains(outputs('Unwanted_Characters'), substring(outputs('String_To_Modify'), item(), 1)), The array contains an entry to represent each character in the string. The range expression would produce the following array: If the string to have characters removed was: Each number represents one character of the string. The range function is useful for all sorts of things, but what we are using it for is to create an array of numbers. In the from field use the expression: range(0, length(outputs('String_To_Modify')) )

This is much faster than using an apply to each method as the execution time is near instant. Most of the work is done within this select action. This step is very simple, simply put the string you want to remove characters from in here (you could also use dynamic string content) Create a Select action to remove any invalid characters from the string. If for example you wanted to remove the characters A, B and C, you would define it as: Create a compose action to define the string to have characters removed. In the first step, a compose action is defined which contains a JSON array of characters to be removed from the string. Create a compose action to define the characters to remove Here is a step by step explanation of how the flow works.

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