Appendix: Utilities#

Utility functions.

(Not intended for external use.)

Combinators#

`identity`(x)	The identity function, i.e., (𝜆 x ⇒ x).
`all_map`(f, xs)	Tests whether f holds for all x in xs.
`any_map`(f, xs)	Tests whether f holds for some x in xs.
`flip`(f)	Returns the function (𝜆 x, y ⇒ f(y, x)).
`foldl`(f, x, xs)	Left-folds xs with using f and starting value x.
`foldl_args`(f, x, *args)	Same as `foldl()` but applies to varargs.
`foldl1`(f, xs)	Left-folds xs using f and no starting value.
`foldl1_args`(f, *args)	Same as `foldl1()` but applies to varargs.
`foldl_infix`(f, g, arg1, arg2, args, *kwargs)	Left-fold variant used to apply infix operators.
`unfoldl`(f, x)	Left-unfolds x using unpacking function f.
`foldr`(f, x, xs)	Right-folds xs using f and starting value x.
`foldr_args`(f, x, *args)	Same as `foldr()` but applies to varargs.
`foldr1`(f, xs)	Right-folds xs using f and no starting value.
`foldr1_args`(f, *args)	Same as `foldr1()` but applies to varargs.
`foldr_infix`(f, g, arg1, arg2, args, *kwargs)	Right-fold variant used to apply infix operators.
`unfoldr`(f, x)	Right-unfolds x using unpacking function f.
`map_args`(f, *args)	Same as `map()` but applies to varargs.
`match_first`(f, xs[, x])	Returns the first element of xs satisfying f; or x
`match_last`(f, xs[, x])	Returns the last element of xs satisfying f; or x.
`sliding_pairs`(it)	Returns a sliding window of width 2 over it.
`sliding_pairs_args`(x1, x2, *xs)	Same as `sliding_pairs()` but applies to varargs.

class Proxy(get_proxy)[source]#

Proxy object.

Forwards any access to the object obtained using get_proxy.

Returns package-data directory of modname.

`Nil`()	Class representing the absence of value.
`camel2snake`(name[, re1, re2])	Converts name from camel-case to snake-case.
`get_variant`(name[, re])	Returns the next numerical-suffixed variant of name.
`get_variant_not_in`(name, avoid)	Same as `get_variant()` but skip variants in avoid.