Unix/Perl/Python: substitute list on big data set (stackoverflow.com)stack
9 points by Subbeh in stackoverflow.com · 7y ago · stack
I've got a mapping file of about 13491 key/value pairs which I need to use to replace the key with the value in a data set of about 500000 lines divided over 25 different files. Example mapping: value1,value2 Example input: field1,field2,**value1**,field4 Example output: field1,…
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