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Best way to check for “empty or null value”
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But coalesce(' '::char(5), '') = '' does not. I would use one of the top two expressions in any case, which work for any character type and are fastest and cleanest.
– Erwin Brandstetter
May 21 '14 at 18:58
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How can I troubleshoot my Perl CGI script?
...gnificantly after awhile and
you will be free to make different mistakes.
Does the script compile?
You can check for compilation errors by using the -c
switch. Concentrate on the first errors reported. Rinse,
repeat. If you are getting really strange errors, check to
ensure that your script has ...
How to prevent vim from creating (and leaving) temporary files?
Why does vim create <filename>~ files? Is there a way to disable that?
7 Answers
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Pandas: Setting no. of max rows
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pd.set_option('display.max_rows', 500)
df
Does not work in Jupyter!
Instead use:
pd.set_option('display.max_rows', 500)
df.head(500)
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Convert MySQL to SQlite [closed]
...s by no means an easy task and I ended up writing this Python package that does the job.
The upside of it being written in Python is that it's cross platform (unlike a shell/bash script) and can all be easily installed using pip install (even on Windows). It uses generators and chunking of the data...
Asp.net 4.0 has not been registered
...ools Command Prompt (2010) Visual Studio x64 Win64 Command Prompt (2010) Does it matter which one is used for this command?
– B. Clay Shannon
Apr 25 '13 at 17:01
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Client on node: Uncaught ReferenceError: require is not defined
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This is because require() does not exist in the browser/client-side JavaScript.
Now you're going to have to make some choices about your client-side JavaScript script management.
You have three options:
Use <script> tag.
Use a CommonJS imple...
Signtool error: No certificates were found that met all given criteria with a Windows Store App?
...signtool. The WDK version has the option, whereas the Windows SDK version does not.
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What's the use/meaning of the @ character in variable names in C#?
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.NET itself doesn't define the @ symbol like this, the C# language specification does. It has supported this since its first version, C# 1.0 (released with .NET 1.0). csharpindepth.com/articles/chapter1/Specifications.aspx
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Integer division: How do you produce a double?
...the type of the result, just in a different way. 'Seems dirty code to me' does not explain in what scenario(s) you believe multiplying by 1.0 is actually better (or why that might be).
– Matthew Flaschen
Mar 3 '14 at 4:23
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