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padStart Task Purpose

The padStart task is used to pad a current string with a specified string (repeated, if needed) so that the resulting string reaches a given length. The padding is applied at the start of the current string.

Potential Use Case

Suppose you have a dataset of a known length and you would like to repeat that dataset at the beginning of the current dataset. You could use the padStart task to specify the numeric length and variables needed to "pad" or be added at the start of the original dataset.


Input and output parameters are shown below.

Incoming Type Description
str String Required. The string to pad.
targetLength Number The length of the resulting string after it has been padded. If the value is less than the original str length, then the original string is returned.
padString String Required. The specified string to pad to the start of the original string.

Outgoing Type Description
paddedString String A string that has been padded at the beginning with a specified string to the desired length.


In this IAP example:

  • The str variable is "Hello World" and the current length of the string is 11 characters, including the space.

  • The new targetLength has been set to 14, and the padString variable of "123" is applied at the start of the current string so that it reaches the desired targetLength of 14 characters.


  • The expected end result is "123Hello World". Notice that the beginning of the word string for "Hello World" has been padded with "123" in order to fulfill the specified targetLength.


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