I need to implement lazy loading in Mathematica. I have a 600 Mb CSV text file which I need to process. This file contains a lot of duplicated records:
I have a text file, a1 a2 b1 b2 c1 c2 ... I want to join by two lines so one can sort it: a1:a2 b1:b2 c开发者_开发技巧1:c2
I have a Perl script that reads in a CSV file, changes the columns names of the original,adds new ones (output CSV column names are stored in the array,header_line), adds new field values for each row
Basically, I\'ve got a bunch of phrases and I\'m only 开发者_StackOverflowinterested in the ones that contain certain words. What I want to do is 1) find out if that word is there and if it is, 2) era
Say I h开发者_如何学Pythonave a CSV file with thousands of lines similar to this one below: 1,fred,smith,\"11, erewhon avenue\",\"XYZ Company, 101 the road\",\"020 123456\",UK
How to go through blocks of lines separated by an empty line? The file looks like the following: ID: 1
I have millions of short (up to 30 words) documents which I need to split into several known categories. It\'s possible, that a document matches several of the categories (seldom, but possible). It\'
I would like to remove contents of a file from a certain character to a certain character in the file in Perl. How do I do that using a script?
I need to parse a bunch of random pages and add them to a DB. I am thinking of using regular expressions but I was wondering if there are a开发者_运维问答ny \'special\' techniques (other than looking
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