toLowerCase - Change all characters in a string to lower case
The toLowerCase
function transforms a string and ensures that all alphabetical characters in the string are lower case.
Syntax
Arguments
Name | Type | Required | Description |
---|---|---|---|
value | string | true | The string to transform to lower case |
Example - Ensuring consistent UUIDs
Consider the following document:
We can see that both uuid1
and uuid2
refer to the same ID, but a direct comparison would yield false
because they are in different cases. toLowerCase
can be used to ensure casing is taken out of the equation when performing direct comparisons of UUID string values.
This will keep only those logs where uuid1
and uuid2
are the same, case insensitive.
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