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ListTools[FlattenOnce] - flatten a (possible nested) list once
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Calling Sequence
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FlattenOnce(L)
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Description
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The FlattenOnce(L) function converts any element in list L which are of type list to expression sequences.
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This procedure has option inline; therefore, it can be used within a procedure without the overhead of a procedure call.
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Note: The inlined procedure ListTools[FlattenOnce](L) is more efficient than a call to ListTools[Flatten](L, 1).
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Examples
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![L := [1, 2, 3, [4, 5, 6]]](/support/helpjp/helpview.aspx?si=7431/file02063/math66.png)
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![L := [1, 2, 3, [4, 5, 6]]](/support/helpjp/helpview.aspx?si=7431/file02063/math69.png)
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![[1, 2, 3, 4, 5, 6]](/support/helpjp/helpview.aspx?si=7431/file02063/math76.png)
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![L := [1, [2], [3, [4]], [[[5]], 6]]](/support/helpjp/helpview.aspx?si=7431/file02063/math80.png)
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![L := [1, [2], [3, [4]], [[[5]], 6]]](/support/helpjp/helpview.aspx?si=7431/file02063/math83.png)
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![[1, 2, 3, [4], [[5]], 6]](/support/helpjp/helpview.aspx?si=7431/file02063/math90.png)
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![[1, 2, 3, 4, 5, 6]](/support/helpjp/helpview.aspx?si=7431/file02063/math97.png)
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