check_membership: Check Membership in List of Tibbles
In tutorial.helpers: Helper Functions for Creating Tutorials

check_membership

R Documentation

Check Membership in List of Tibbles

Description

This function filters a list of tibbles based on whether a key variable's value is among the membership values. It first uses check_key_vars() to ensure the key variable exists, then checks membership. Useful for keeping only specific students or participants.

Usage

check_membership(tibble_list, key_var, membership, verbose = FALSE)

Arguments

`tibble_list`	A named list of tibbles, each containing an "id" column and an "answer" column
`key_var`	A character string specifying the key variable to check
`membership`	A character vector of allowed values for the key variable
`verbose`	Logical indicating whether to report removed items (default: FALSE)

Value

A list of tibbles where the key variable exists and its value is in the membership list

Examples

## Not run: 
# Create sample data with student emails
path <- file.path(find.package("tutorial.helpers"), "tests/testthat/fixtures/answers_html")

tibble_list <- gather_submissions(path, "stop")

result <- check_membership(tibble_list, 
                           key_var = "email", 
                           membership = c("bluebird.jack.xu@gmail.com", 
                                          "hassan.alisoni007@gmail.com"))


## End(Not run)

tutorial.helpers documentation built on Sept. 11, 2025, 9:09 a.m.