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add assoc

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This commit is contained in:
Justin Lin
2020-03-27 13:53:07 +08:00
parent c3b26097ef
commit 44e78679e8
2 changed files with 23 additions and 0 deletions
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14
src/experimental/_impl/_assoc_impl.scad Normal file
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use <util/slice.scad>;
function _assoc_get(array, key) =
let(idx = search([key], array)[0])
array[idx][1];
function _assoc_put(array, key, value) =
let(idx = search([key], array)[0])
idx == [] ? concat(array, [[key, value]]) :
concat(slice(array, 0, idx), [[key, value]], slice(array, idx + 1));
function _assoc_remove(array, key) =
let(idx = search([key], array)[0])
idx == [] ? array : concat(slice(array, 0, idx), slice(array, idx + 1));

9
src/experimental/assoc.scad Normal file
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use <experimental/_impl/_assoc_impl.scad>;
// treat an associative array as a dictionary.
function assoc(array, cmd, key, value) =
is_undef(array) ? [] :
cmd == "put" ? _assoc_put(array, key, value) :
cmd == "get" ? _assoc_get(array, key) :
cmd == "remove" ? _assoc_remove(array, key) : assert("Uknown command");