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37 lines
756 B
Markdown
37 lines
756 B
Markdown
# flat
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returns a new list with all sub-list elements concatenated into it recursively up to the specified depth.
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**Since:** 2.3
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## Parameters
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- `lt` : The original list.
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- `depth` : Default to 1. The depth level specifying how deep a nested list should be flattened.
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## Examples
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use <util/flat.scad>
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vt = [[[[1, 2], [3, 4]], [[5, 6], [7, 8]]]];
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assert(
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flat([1, 2, [3, 4]]) == [1, 2, 3, 4]
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);
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assert(
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flat([[1, 2], [3, 4]]) == [1, 2, 3, 4]
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);
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assert(
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flat([[[[1, 2], [3, 4]], [[5, 6], [7, 8]]]]) == [[[1, 2], [3, 4]], [[5, 6], [7, 8]]]
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);
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assert(
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flat([[[[1, 2], [3, 4]], [[5, 6], [7, 8]]]], 2) == [[1, 2], [3, 4], [5, 6], [7, 8]]
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);
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assert(
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flat([[[[1, 2], [3, 4]], [[5, 6], [7, 8]]]], 3) == [1, 2, 3, 4, 5, 6, 7, 8]
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);
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