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What are the differences among grep, awk & sed? [duplicate]
...le name lists.
Awk is an entire programming language built around reading CSV-style files, processing the records, and optionally printing out a result data set. It can do many things but it is not the easiest tool to use for simple tasks.
Sed is useful when you want to make changes to a file base...
Change the name of a key in dictionary
...dictionary comprehension:
This is an example I encountered while reading a CSV using a DictReader. The user had suffixed all the column names with ':'
ori_dict = {'key1:' : 1, 'key2:' : 2, 'key3:' : 3}
to get rid of the trailing ':' in the keys:
corrected_dict = { k.replace(':', ''): v for k, v i...
Removing duplicate values from a PowerShell array
... duplicate. Typically I have to Remove Duplicates manually from the final CSV output in Excel to finish the report, but sometimes I would like to continue working with said data within Powershell after removing the duplicates.
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Submit HTML form on self page
...still important today - you can take any model you want, be it JSON, text, csv, write a simple transformer from that format to XML, write a DTD for that XML, and bam, you skip needing to write your own validator, XML already did that!
– Dmitry
Jun 19 '18 at 15:...
The cause of “bad magic number” error when loading a workspace and how to avoid it?
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So did I, when I accidentally used load() instead of read.csv(). :p
– Waldir Leoncio
Feb 12 '14 at 19:31
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Ruby: What is the easiest way to remove the first element from an array?
...eful when extracting info without an aditional step header, *properties = CSV.read(file_path,encoding: 'ISO-8859-1')
– juliangonzalez
Feb 15 '17 at 17:23
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Split string into an array in Bash
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@YisraelDov: Bash has no way to deal with CSV by itself. It can't tell the difference between commas inside quotes and those outside them. You will need to use a tool that understands CSV such as a lib in a higher level language, for example the csv module in Python....
Dump Mongo Collection into JSON format
... The mongoexport utility takes a collection and exports to either JSON or CSV. You can specify a filter for the query, or a list of fields to output
Read more here: http://www.mongodb.org/display/DOCS/mongoexport
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“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
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Try this to read using pandas
pd.read_csv('u.item', sep='|', names=m_cols , encoding='latin-1')
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When to Redis? When to MongoDB? [closed]
... SQL-driven relational database: relational databases simplify to indexed CSV files, each file being a table; document stores simplify to indexed JSON files, each file being a document, with multiple files grouped together.
JSON files are similar in structure to XML and YAML files, and to dictiona...