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22 lines
721 B
Markdown
22 lines
721 B
Markdown
# hashmap_del
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This function deletes the mapping for the specified key from a [util/map/hashmap](https://openhome.cc/eGossip/OpenSCAD/lib3x-hashmap.html) if present. It returns a new map without the key/value.
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**Since:** 3.0
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## Parameters
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- `map` : The original map.
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- `key` : The specified key.
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- `eq` : A equality function. If it's ignored, use `==` to compare elements.
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- `hash` : A hash function. If it's ignored, convert each element to a string and hash it.
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## Examples
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use <util/map/hashmap.scad>;
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use <util/map/hashmap_get.scad>;
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use <util/map/hashmap_del.scad>;
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m1 = hashmap([["k1", 10], ["k2", 20], ["k3", 30]]);
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m2 = hashmap_del(m1, "k1");
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assert(hashmap_get(m2, "k1") == undef); |