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| author | Colin Okay <cbeok@protonmail.com> | 2020-07-10 08:24:27 -0500 |
|---|---|---|
| committer | Colin Okay <cbeok@protonmail.com> | 2020-07-10 08:24:27 -0500 |
| commit | 674824f91bf30c31086a069ce55a0d98ff279d6d (patch) | |
| tree | 9651d5dff24571846bdf4f4311f10563b453452e | |
| parent | 389582c4d1e18de495e05c48e9309ba668147705 (diff) | |
added indexed!
| -rw-r--r-- | README.md | 3 | ||||
| -rw-r--r-- | gtwiwtg.lisp | 4 |
2 files changed, 6 insertions, 1 deletions
@@ -189,7 +189,7 @@ You can see some of these in action in the examples section at the top of this d ### The Combination and Transformation Functions You can create more intersting and more specific generators by using a -few higher-order functions to transform combine and transform simple generators. +few higher-order functions to combine and transform simple generators. These transformations are desirable because they can be performed before any elements are produced. @@ -248,6 +248,7 @@ Here are some simple examples of their use: ### The Other Combinations and Transformations - `(zip! gen1 &rest gens)` is shorthand for `(map! #'list gen1 gen2 ...)` +- `(indexed! gen)` is shorthand for `(zip! (range) gen)` - `(concat! gen &rest gens)` is shorthand for `(inflate! #'identity (seq (list* gen1 gen2 ...)))` - `(skip! n gen)` produces a generator by skipping the first `n` values in `gen` - `(skip-while! pred gen)` produces a generator by skippng elements of `gen` while `pred` is `t` diff --git a/gtwiwtg.lisp b/gtwiwtg.lisp index caf5be7..0ac6578 100644 --- a/gtwiwtg.lisp +++ b/gtwiwtg.lisp @@ -462,6 +462,10 @@ Error Conditions: "Is a shortcut for (MAP! #'LIST GEN1 GEN2 ...)" (apply #'map! #'list gen gens)) +(defun indexed! (gen) + "Is shorthand for (ZIP! (RANGE) GEN)" + (zip! (range) gen)) + (defun merge! (comparator gen1 gen2 &rest gens) "Emulates the behavior of MERGE (in the ANSI standard), but for generators. |