Add or modify columns in JSON data.

Add or modify columns in JSON data.

Usage

# S3 method for class 'tbl_lazy_json'
mutate(.data, ...)

Arguments

.data

A tbl_lazy_json object.

...

Name-value pairs of expressions. The name gives the name of the column in the output. The value should be an expression using existing columns, e.g. new_col = col1 + col2.

Conditional helpers are translated to JavaScript: ifelse() and if_else() become ternary operators, and case_when() becomes a chained set of ternary operators. case_when() clauses without a TRUE ~ ... catch-all yield null for unmatched rows, matching dplyr's NA default.

across() is expanded on the R side into one column per selection. It accepts a single function (across(c(a, b), round)), a formula lambda (across(c(a, b), ~ .x * 2)), or a named list of functions (across(c(a, b), list(double = ~ .x * 2))). Column selections accept c(...), a bare column, a character vector, and all_of()/any_of(). Use .names with the {.col}/{.fn} glue placeholders to control the output column names; by default a single function reuses the input name and multiple functions produce {.col}_{.fn}.