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Alter MySQL table to add comments on columns
...s you from accidentally losing an important part of your column definition by not realising that you need to include it in your MODIFY or CHANGE clause. For example, if you MODIFY an AUTO_INCREMENT column, you need to explicitly specify the AUTO_INCREMENT modifier again in the MODIFY clause, or the ...
pandas: How do I split text in a column into multiple rows?
...file and the next to last column has a string of text that I want to split by a specific delimiter. I was wondering if there is a simple way to do this using pandas or python?
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Get selected subcommand with argparse
... dest - name of the attribute under which sub-command name will be stored; by default None and no value is stored
In the example below of a simple task function layout using subparsers, the selected subparser is in parser.parse_args().subparser.
import argparse
def task_a(alpha):
print('tas...
What is “assert” in JavaScript?
...s if they can be disabled, if only because your code might one day be used by someone who thinks it is safe to do so. If assertions are critical to your code, then I think they really should be upgraded to proper error checking rather than relying on a debugging method that is not always guaranteed...
How can I remove the first line of a text file using bash/sed script?
... though. I wonder how they managed that; tail should just read a file line by line while sed does pretty complex operations involving interpreting a script, applying regular expressions and the like.
Note: You may be tempted to use
# THIS WILL GIVE YOU AN EMPTY FILE!
tail -n +2 "$FILE" > "$FILE...
How to handle more than 10 parameters in shell
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@WilliamPursell ${10} is defined by POSIX
– Steven Penny
Dec 9 '16 at 19:15
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Why are my JavaScript function names clashing?
...n the new ECMAScript 6 standard, let statements forbid this.
This article by @kangax does a fantastic job in demystifying functions in javascript
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How does the Comma Operator work
... same way as a semicolon. The difference is that two expressions separated by a semicolon form two separate statements, while comma-separation keeps all as a single expression. This is why comma operator is sometimes used in the following scenarios:
C syntax requires an single expression, not a st...
How to cache data in a MVC application
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If you don't set expiration..when does cache expire by default?
– Chaka
Sep 27 '13 at 13:58
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How to read a file into a variable in shell?
... edited Feb 15 '17 at 19:19
Zbyszek
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answered May 27 '12 at 5:22
A...