apropos

Builtin index · REPL & diagnostics

result = apropos("filter")

Input: "filter" · Output: result

What it is

Takes one argument, a search substring (a string, e.g. "filter"). Returns a List of strings: every builtin name containing that substring, in engine-registration order.

Overloads

One call shape — this function is not overloaded.

Code	Input	Output	Description
`result = apropos("filter")`	`"filter"` string or Listnot documented yet	`result` —	Returns a list rather than printing, so a script can count (`len(...)`) or loop over the hits.

Examples

From the documentation, and run by the build -- the output and the figure below are what the engine actually produced. Simplest first.

print(apropos("csv"))

output

("csv2json", "csv2xml", "csvify", "json2csv", "parse_csv", "read_csv", "write_csv", "xml2csv")

from agent-guide

names = builtins()
print("total builtins: {len(names)}")
hits = apropos("filter")
print("filter-related: {hits}")
help("curve_fit")

from repl-diagnostics

How it works

apropos("fit") -- every name containing the word. Returns a list rather than printing, so a script can use it too: length(apropos("filter")), or loop over the results.

From the note above this builtin in the interpreter, where the reasoning was written down as it was built.