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had-utils.collections
count-whenclj
(count-when coll)(count-when coll f)Count the number of elements in coll where f returns true. If not supplied use identity as f.
Count the number of elements in coll where f returns true. If not supplied use identity as f.
map-kvclj
(map-kv m val-fn)(map-kv m key-fn val-fn)Construct a new map from an existing one. Each of val-fn and (optional - default (fn [k _] k)) key-fn are a function of two arguments, the key and value. Note that to make the usage more natural the optional key-fn argument goes in the second place when used.
Construct a new map from an existing one. Each of val-fn and (optional - default (fn [k _] k)) key-fn are a function of two arguments, the key and value. Note that to make the usage more natural the optional key-fn argument goes in the second place when used.
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