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Why `null >= 0 && null
I had to write a routine that increments the value of a variable by 1 if its type is number and assigns 0 to the variable if not, where the variable is initially null or undefined .
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What does “Receiver type 'CALayer' for instance message is a forward declaration” mean here?
I'm porting a block of code from an iOS4 project to iOS5 and I'm having some troubles with ARC. The code generates a PDF from a screen capture.
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How to use MySQL DECIMAL?
...'t quite get a grasp of MySQL's DECIMAL. I need the row to be able to contain a number anywhere from 00.0001 to 99.9999. How would I structure it to work like so?
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Git: Show all of the various changes to a single line in a specified file over the entire git histor
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Since git 1.8.4, there is a more direct way to answer your question.
Assuming that line 110 is the line saying var identifier = "SOME_IDENTIFIER";, then do this:
git log -L110,110:/lib/client.js
This will return every comm...
How to use Chrome's network debugger with redirects
...lt to debug pages that automatically reload for one reason or another (running script or 300 responses).
4 Answers
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Is it possible to use global variables in Rust?
I know that in general, global-variables are to be avoided. Nevertheless, I think in a practical sense, it is sometimes desirable (in situations where the variable is integral to the program) to use them.
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Asynchronous shell commands
I'm trying to use a shell script to start a command. I don't care if/when/how/why it finishes. I want the process to start and run, but I want to be able to get back to my shell immediately...
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“git diff” does nothing
...where, but I can't figure out where. Regular git commands appear to work fine, but "git diff" does nothing. To be safe, I removed external diff tools from my .gitconfig file. This was installed via MacPorts and is the lates version (1.7.2.2).
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How to check whether an object has certain method/property?
Using dynamic pattern perhaps? You can call any method/property using the dynamic keyword, right? How to check whether the method exist before calling myDynamicObject.DoStuff(), for example?
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How do I spool to a CSV formatted file using SQLPLUS?
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If you are using 12.2, you can simply say
set markup csv on
spool myfile.csv
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