diff options
Diffstat (limited to 'lib/stdlib/doc/src/proplists.xml')
| -rw-r--r-- | lib/stdlib/doc/src/proplists.xml | 210 |
1 files changed, 65 insertions, 145 deletions
diff --git a/lib/stdlib/doc/src/proplists.xml b/lib/stdlib/doc/src/proplists.xml index 9f1c5b24ad..225c5e97eb 100644 --- a/lib/stdlib/doc/src/proplists.xml +++ b/lib/stdlib/doc/src/proplists.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>2002</year><year>2010</year> + <year>2002</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -48,14 +48,15 @@ words, numbers are compared literally rather than by value, so that, for instance, <c>1</c> and <c>1.0</c> are different keys.</p> </description> + <datatypes> + <datatype> + <name name="property"/> + </datatype> + </datatypes> <funcs> <func> - <name>append_values(Key, List) -> List</name> + <name name="append_values" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Similar to <c>get_all_values/2</c>, but each value is wrapped in a list unless it is already itself a list, and the @@ -65,11 +66,8 @@ </desc> </func> <func> - <name>compact(List) -> List</name> + <name name="compact" arity="1"/> <fsummary></fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> <p>Minimizes the representation of all entries in the list. This is equivalent to <c><![CDATA[[property(P) || P <- List]]]></c>.</p> @@ -77,33 +75,24 @@ </desc> </func> <func> - <name>delete(Key, List) -> List</name> + <name name="delete" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> - <p>Deletes all entries associated with <c>Key</c> from - <c>List</c>.</p> + <p>Deletes all entries associated with <c><anno>Key</anno></c> from + <c><anno>List</anno></c>.</p> </desc> </func> <func> - <name>expand(Expansions, List) -> List</name> + <name name="expand" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>Expansions = [{Property,[term()]}]</v> - <v>Property = atom() | tuple()</v> - </type> <desc> <p>Expands particular properties to corresponding sets of - properties (or other terms). For each pair <c>{Property, Expansion}</c> in <c>Expansions</c>, if <c>E</c> is - the first entry in <c>List</c> with the same key as - <c>Property</c>, and <c>E</c> and <c>Property</c> + properties (or other terms). For each pair <c>{<anno>Property</anno>, <anno>Expansion</anno>}</c> in <c><anno>Expansions</anno></c>, if <c>E</c> is + the first entry in <c><anno>List</anno></c> with the same key as + <c><anno>Property</anno></c>, and <c>E</c> and <c><anno>Property</anno></c> have equivalent normal forms, then <c>E</c> is replaced with - the terms in <c>Expansion</c>, and any following entries with - the same key are deleted from <c>List</c>.</p> + the terms in <c><anno>Expansion</anno></c>, and any following entries with + the same key are deleted from <c><anno>List</anno></c>.</p> <p>For example, the following expressions all return <c>[fie, bar, baz, fum]</c>:</p> <code type="none"> expand([{foo, [bar, baz]}], @@ -120,103 +109,75 @@ <p>Note that if the original property term is to be preserved in the result when expanded, it must be included in the expansion list. The inserted terms are not expanded recursively. If - <c>Expansions</c> contains more than one property with the same + <c><anno>Expansions</anno></c> contains more than one property with the same key, only the first occurrence is used.</p> <p>See also: <c>normalize/2</c>.</p> </desc> </func> <func> - <name>get_all_values(Key, List) -> [term()]</name> + <name name="get_all_values" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Similar to <c>get_value/2</c>, but returns the list of values for <em>all</em> entries <c>{Key, Value}</c> in - <c>List</c>. If no such entry exists, the result is the empty + <c><anno>List</anno></c>. If no such entry exists, the result is the empty list.</p> <p>See also: <c>get_value/2</c>.</p> </desc> </func> <func> - <name>get_bool(Key, List) -> bool()</name> + <name name="get_bool" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Returns the value of a boolean key/value option. If - <c>lookup(Key, List)</c> would yield <c>{Key, true}</c>, + <c>lookup(<anno>Key</anno>, <anno>List</anno>)</c> would yield <c>{<anno>Key</anno>, true}</c>, this function returns <c>true</c>; otherwise <c>false</c> is returned.</p> <p>See also: <c>get_value/2</c>, <c>lookup/2</c>.</p> </desc> </func> <func> - <name>get_keys(List) -> [term()]</name> + <name name="get_keys" arity="1"/> <fsummary></fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> - <p>Returns an unordered list of the keys used in <c>List</c>, + <p>Returns an unordered list of the keys used in <c><anno>List</anno></c>, not containing duplicates.</p> </desc> </func> <func> - <name>get_value(Key, List) -> term()</name> + <name name="get_value" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> - <p>Equivalent to <c>get_value(Key, List, undefined)</c>.</p> + <p>Equivalent to <c>get_value(<anno>Key</anno>, <anno>List</anno>, undefined)</c>.</p> </desc> </func> <func> - <name>get_value(Key, List, Default) -> term()</name> + <name name="get_value" arity="3"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>Default = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Returns the value of a simple key/value property in - <c>List</c>. If <c>lookup(Key, List)</c> would yield - <c>{Key, Value}</c>, this function returns the corresponding - <c>Value</c>, otherwise <c>Default</c> is returned.</p> + <c><anno>List</anno></c>. If <c>lookup(<anno>Key</anno>, <anno>List</anno>)</c> would yield + <c>{<anno>Key</anno>, Value}</c>, this function returns the corresponding + <c>Value</c>, otherwise <c><anno>Default</anno></c> is returned.</p> <p>See also: <c>get_all_values/2</c>, <c>get_bool/2</c>, <c>get_value/2</c>, <c>lookup/2</c>.</p> </desc> </func> <func> - <name>is_defined(Key, List) -> bool()</name> + <name name="is_defined" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> - <p>Returns <c>true</c> if <c>List</c> contains at least - one entry associated with <c>Key</c>, otherwise + <p>Returns <c>true</c> if <c><anno>List</anno></c> contains at least + one entry associated with <c><anno>Key</anno></c>, otherwise <c>false</c> is returned.</p> </desc> </func> <func> - <name>lookup(Key, List) -> none | tuple()</name> + <name name="lookup" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> - <p>Returns the first entry associated with <c>Key</c> in - <c>List</c>, if one exists, otherwise returns + <p>Returns the first entry associated with <c><anno>Key</anno></c> in + <c><anno>List</anno></c>, if one exists, otherwise returns <c>none</c>. For an atom <c>A</c> in the list, the tuple <c>{A, true}</c> is the entry associated with <c>A</c>.</p> <p>See also: <c>get_bool/2</c>, <c>get_value/2</c>, @@ -224,34 +185,20 @@ </desc> </func> <func> - <name>lookup_all(Key, List) -> [tuple()]</name> + <name name="lookup_all" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> - <p>Returns the list of all entries associated with <c>Key</c> - in <c>List</c>. If no such entry exists, the result is the + <p>Returns the list of all entries associated with <c><anno>Key</anno></c> + in <c><anno>List</anno></c>. If no such entry exists, the result is the empty list.</p> <p>See also: <c>lookup/2</c>.</p> </desc> </func> <func> - <name>normalize(List, Stages) -> List</name> + <name name="normalize" arity="2"/> <fsummary></fsummary> - <type> - <v>List = [term()]</v> - <v>Stages = [Operation]</v> - <v>Operation = {aliases, Aliases} | {negations, Negations} | {expand, Expansions}</v> - <v>Aliases = [{Key, Key}]</v> - <v>Negations = [{Key, Key}]</v> - <v>Key = term()</v> - <v>Expansions = [{Property, [term()]}]</v> - <v>Property = atom() | tuple()</v> - </type> <desc> - <p>Passes <c>List</c> through a sequence of + <p>Passes <c><anno>List</anno></c> through a sequence of substitution/expansion stages. For an <c>aliases</c> operation, the function <c>substitute_aliases/2</c> is applied using the given list of aliases; for a <c>negations</c> operation, @@ -270,51 +217,37 @@ </desc> </func> <func> - <name>property(Property) -> Property</name> + <name name="property" arity="1"/> <fsummary></fsummary> - <type> - <v>Property = atom() | tuple()</v> - </type> <desc> <p>Creates a normal form (minimal) representation of a property. If - <c>Property</c> is <c>{Key, true}</c> where <c>Key</c> is + <c><anno>Property</anno></c> is <c>{Key, true}</c> where <c>Key</c> is an atom, this returns <c>Key</c>, otherwise the whole term - <c>Property</c> is returned.</p> + <c><anno>Property</anno></c> is returned.</p> <p>See also: <c>property/2</c>.</p> </desc> </func> <func> - <name>property(Key, Value) -> Property</name> + <name name="property" arity="2"/> <fsummary></fsummary> - <type> - <v>Key = term()</v> - <v>Value = term()</v> - <v>Property = atom() | tuple()</v> - </type> <desc> <p>Creates a normal form (minimal) representation of a simple - key/value property. Returns <c>Key</c> if <c>Value</c> is - <c>true</c> and <c>Key</c> is an atom, otherwise a tuple - <c>{Key, Value}</c> is returned.</p> + key/value property. Returns <c><anno>Key</anno></c> if <c><anno>Value</anno></c> is + <c>true</c> and <c><anno>Key</anno></c> is an atom, otherwise a tuple + <c>{<anno>Key</anno>, <anno>Value</anno>}</c> is returned.</p> <p>See also: <c>property/1</c>.</p> </desc> </func> <func> - <name>split(List, Keys) -> {Lists, Rest}</name> + <name name="split" arity="2"/> <fsummary></fsummary> - <type> - <v>List = [term()]</v> - <v>Keys = [term()]</v> - <v>Lists = [[term()]]</v> - <v>Rest = [term()]</v> - </type> <desc> - <p>Partitions <c>List</c> into a list of sublists and a - remainder. <c>Lists</c> contains one sublist for each key in - <c>Keys</c>, in the corresponding order. The relative order of + <p>Partitions <c><anno>List</anno></c> into a list of sublists and a + remainder. <c><anno>Lists</anno></c> contains one sublist for each key in + <c><anno>Keys</anno></c>, in the corresponding order. The relative order of the elements in each sublist is preserved from the original - <c>List</c>. <c>Rest</c> contains the elements in - <c>List</c> that are not associated with any of the given keys, + <c><anno>List</anno></c>. <c><anno>Rest</anno></c> contains the elements in + <c><anno>List</anno></c> that are not associated with any of the given keys, also with their original relative order preserved.</p> <p>Example: split([{c, 2}, {e, 1}, a, {c, 3, 4}, d, {b, 5}, b], [a, b, c])</p> @@ -323,19 +256,14 @@ </desc> </func> <func> - <name>substitute_aliases(Aliases, List) -> List</name> + <name name="substitute_aliases" arity="2"/> <fsummary></fsummary> - <type> - <v>Aliases = [{Key, Key}]</v> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Substitutes keys of properties. For each entry in - <c>List</c>, if it is associated with some key <c>K1</c> - such that <c>{K1, K2}</c> occurs in <c>Aliases</c>, the - key of the entry is changed to <c>Key2</c>. If the same - <c>K1</c> occurs more than once in <c>Aliases</c>, only + <c><anno>List</anno></c>, if it is associated with some key <c>K1</c> + such that <c>{K1, K2}</c> occurs in <c><anno>Aliases</anno></c>, the + key of the entry is changed to <c>K2</c>. If the same + <c>K1</c> occurs more than once in <c><anno>Aliases</anno></c>, only the first occurrence is used.</p> <p>Example: <c>substitute_aliases([{color, colour}], L)</c> will replace all tuples <c>{color, ...}</c> in <c>L</c> @@ -345,24 +273,19 @@ </desc> </func> <func> - <name>substitute_negations(Negations, List) -> List</name> + <name name="substitute_negations" arity="2"/> <fsummary></fsummary> - <type> - <v>Negations = [{Key, Key}]</v> - <v>Key = term()</v> - <v>List = [term()]</v> - </type> <desc> <p>Substitutes keys of boolean-valued properties and simultaneously negates their values. For each entry in - <c>List</c>, if it is associated with some key <c>K1</c> - such that <c>{K1, K2}</c> occurs in <c>Negations</c>, then + <c><anno>List</anno></c>, if it is associated with some key <c>K1</c> + such that <c>{K1, K2}</c> occurs in <c><anno>Negations</anno></c>, then if the entry was <c>{K1, true}</c> it will be replaced with <c>{K2, false}</c>, otherwise it will be replaced with <c>{K2, true}</c>, thus changing the name of the option and simultaneously negating the value given by <c>get_bool(List)</c>. If the same <c>K1</c> occurs more - than once in <c>Negations</c>, only the first occurrence is + than once in <c><anno>Negations</anno></c>, only the first occurrence is used.</p> <p>Example: <c>substitute_negations([{no_foo, foo}], L)</c> will replace any atom <c>no_foo</c> or tuple @@ -374,13 +297,10 @@ </desc> </func> <func> - <name>unfold(List) -> List</name> + <name name="unfold" arity="1"/> <fsummary></fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> - <p>Unfolds all occurrences of atoms in <c>List</c> to tuples + <p>Unfolds all occurrences of atoms in <c><anno>List</anno></c> to tuples <c>{Atom, true}</c>.</p> </desc> </func> |