ltrim - Remove whitspace from string start

The ltrim function will remove whitespace from the start of a given string value, but not from the end.

Syntax

Like many functions in DataPrime, ltrim supports two notations, function and method notation. These interchangeable forms allow flexibility in how you structure expressions.

ltrim(value: string): string

value: string.ltrim(): string

Arguments

Example - Cleaning up an extracted username

Consider the following document:

{
  "message": "user  Chris has logged in"
}

We want to extract the username from this string, so that we can search and query it directly. This can be done using the extract keyword with a regular expression.

extract message into my_data using regexp(e=/user (?<user>.*) has logged in/)

This results in this log object:

{
  "message": "user  Chris has logged in",
  "my_data": {
    "user": " Chris"
  }
}

Notice the leading space at the start of the username. This is because a stray space has made its way in. We can use ltrim to clean this up:

replace my_data.user with ltrim(my_data.user)

replace my_data.user with my_data.user.ltrim()

This will remove the leading space from the username and result in a cleaner value.

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