object
pairs
Useful predicates over lists of pairs (key-value terms).
logtalk_load(types(loader))static, context_switching_calls
Usage: This object can be loaded independently of other entities in the
typeslibrary by using the goallogtalk_load(types(pairs)).
Public predicates
keys_values/3
Converts between a list of pairs and lists of keys and values.
statickeys_values(Pairs,Keys,Values)keys_values(+list(pair),-list,-list) - onekeys_values(-list(pair),+list,+list) - onekeys/2
Returns a list of keys from a list of pairs.
statickeys(Pairs,Keys)keys(+list(pair),-list) - onekey/2
Enumerates by backtracking all keys from a list of pairs.
statickey(Pairs,Key)key(+list(pair),-term) - zero_or_morevalues/2
Returns a list of values from a list of pairs.
staticvalues(Pairs,Values)values(+list(pair),-list) - onevalue/3
Returns a value addressed by the given path (a key or a list of keys in the case of nested list of pairs). Fails if path does not exist.
staticvalue(Pairs,Path,Value)value(+list(pair),+term,-term) - zero_or_onevalue(+list(pair),+list,-term) - zero_or_onetranspose/2
Transposes a list of pairs by swapping each pair key and value. The relative order of the list elements is kept.
statictranspose(Pairs,TransposedPairs)transpose(+list(pair),-list(pair)) - onegroup_sorted_by_key/2
Groups pairs by key by sorting them and then constructing new pairs by grouping all values for a given key in a list. Keys are compared using equality. Relative order of values per key is kept. Resulting list of pairs is sorted by key.
staticgroup_sorted_by_key(Pairs,Groups)group_sorted_by_key(+list(pair),-list(pair)) - onegroup_consecutive_by_key/2
Groups pairs by constructing new pairs by grouping all values for consecutive key in a list. Keys are compared using equality. The relative order of the values for the same key is kept.
staticgroup_consecutive_by_key(Pairs,Groups)group_consecutive_by_key(+list(pair),-list(pair)) - onegroup_by_key/2
Same as the group_sorted_by_key/2 predicate. Deprecated.
staticgroup_by_key(Pairs,Groups)group_by_key(+list(pair),-list(pair)) - onemap/3
Maps a list into pairs using a closure that applies to each list element to compute its key.
staticmap(Closure,List,Pairs)map(2,*,*)map(@callable,+list,-list(pair)) - oneProtected predicates
(none)
Private predicates
(none)
Operators
(none)