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twanvl
689def7325
git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@571 0fc631ac-6414-0410-93d0-97cfa31319b6
27 lines
1.0 KiB
Plaintext
27 lines
1.0 KiB
Plaintext
Function: position
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--Usage--
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> position(of: some_item, in: some_list)
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Returns the position of an item in a list.
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The first position is @0@.
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If the item is not found in the list, returns @-1@.
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--Parameters--
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! Parameter Type Description
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| @of@ ''anything'' Item to look for.
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| @in@ [[type:list]] or [[type:set]] List to look in.
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Can be a [[type:set]] when looking for a card.
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| @order_by@ [[type:function]] (optional) Find the position as if the list was [[fun:sort_list|sorted]] by this criterion.
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Only when looking in a set.
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| @filter@ [[type:function]] (optional) Find the position as if the list was [[fun:filter_list|filtered]] by this criterion.
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Only when looking in a set.
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--Examples--
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> postion(of: "x", in: ["x", "y", "z"]) == 0
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> postion(of: "z", in: ["x", "y", "z"]) == 2
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> postion(of: "a", in: ["x", "y", "z"]) == -1
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>
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> # The position of the card in the list of red cards, ordered by name
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> postion(of: card, in: set, order_by: {card.name}, filter:{card.color == "red"})
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