NAME¶
Catmandu::Fix::Bind::hashmap - a binder to add key/value pairs to an internal
hashmap
SYNOPSIS¶
# Find all ISBN in a stream
do hashmap(exporter => JSON, join => ',')
# Need an identity binder to group all operations that calculate key_value pairs
do identity()
copy_field(isbn,key)
copy_field(_id,value)
end
end
# will export to the YAML exporter a hash map containing all isbn occurrences in the stream
{ "_id": "ISBN1" , "value": "0121,12912,121" }
{ "_id": "ISBN2" , "value": "102012" }
# Count the number of ISBN occurrences in a stream
# File: count.fix:
do hashmap(count: 1)
do identity()
copy_field(isbn,key)
end
end
# Use the Null exporter to suppress the normal output
$ cat /tmp/data.json | catmandu convert JSON --fix count.fix to Null
DESCRIPTION¶
The hashmap binder will insert all key/value pairs given to a internal hashmap
that can be exported using an Catmandu::Exporter.
If the key is an ARRAY, then multiple key/value pairs will be inserted into the
hashmap.
By default all the values will be added as an array to the hashmap. Every key
will have one or more values.
CONFIGURATION¶
exporter: EXPORTER¶
The name of an exporter to send the results to. Default: JSON
store: STORE¶
Send the output to a store instead of an exporter.
unique: 0|1¶
All the values for the a key will be unique.
join: CHAR¶
Join all the values of a key using a delimiter.
count: 0|1¶
Don't store the values only count the number of key occurences.
AUTHOR¶
Patrick Hochstenbach - Patrick.Hochstenbach@UGent.be
SEE ALSO¶
Catmandu::Fix::Bind