Count

15 December 2023

C12 - added the regular expression option.

unknown C10 - initial

count (Sifts)
Type	Corrade progressive sift
Sift	`count`
Parameters	a CSV `string` representing a regular expression (regex) and regular expression options
Description	The `count` sift will count the number of items in a list that match a supplied regular expression.
Last Changes	None

The count sift will count the number of items in a list that match a supplied regular expression.

Arguments

Name	Type	Description	Example
`pattern`	a string	a regular expression	`[Ss]hoe`
`options`	a CSV of strings	regular expression engine options	`IgnoreCase,Compiled`

The full list of regular expression options that can be passed is documented on the Microsoft website.

Example

The following sift when added to a command will skip the first 2 items and then count the number of elements of the list that match the regular expression /[0-9]+?/:

    "sift", wasListToCSV([
        "skip", 2,
        "count",  wasURLEscape(
            wasKeyValueEncode(
                [
                    "pattern", "[0-9]",
                    "options", wasListToCSV([ "IgnoreCase", "Compiled" ])
                ]
            )
        )
    ]),

Effect on Returned Data

Given the input

data=a,1,c,2,e,3,h,4,h,5,j,7

the expected output is:

data=5

Table of Contents

Count

Arguments

Example

Effect on Returned Data