NAME

       Catmandu::Fix::lookup - change the value of a HASH key or ARRAY index by looking up its
       value in a dictionary

SYNOPSIS

           # dictionary.csv
           # id,planet
           # 1,sun
           # 2,earth
           # 3,moon

           # values found in the dictionary.csv will be replaced
           # {foo => {bar => 2}}
           lookup(foo.bar, dictionary.csv)
           # {foo => {bar => 'earth'}}

           # values not found will be kept
           # {foo => {bar => 232}}
           lookup(foo.bar, dictionary.csv)
           # {foo => {bar => 232}}

           # in case you have a different seperator
           lookup(foo.bar, dictionary.csv, sep_char: |)

           # delete value if the lookup fails:
           lookup(foo.bar, dictionary.csv, delete: 1)

           # use a default value if the lookup fails:
           lookup(foo.bar, dictionary.csv, default: 'default value')

SEE ALSO

       Catmandu::Fix, Catmandu::Fix::mapping