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How to define @Value as optional
...r example was @Value("${myValue:DEFAULT}").
You are not limited to plain strings as default values. You can use SPEL expressions, and a simple SPEL expression to return null is:
@Value("${myValue:#{null}}")
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Merge 2 arrays of objects
...mplexity as @YOU's answer, except that this is much slower (largely due to extra function calls and the fact the YOU's answer exploits the JS associative arrays trick to find items with O(1) lookup). This is besides the fact that you need to bring an additional library.
– Mrch...
Show the progress of a Python multiprocessing pool imap_unordered call?
... @WakanTanka: It goes in the main script after it spins off the extra threads. In my original example, it goes in the "while" loop, where rs has already launched the other threads.
– MidnightLightning
Aug 24 '15 at 11:58
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GCC -g vs -g3 GDB Flag: What is the Difference?
...ging information. On most systems that use stabs format, -g
enables use of extra debugging information that only GDB can use; this
extra information makes debugging work better in GDB but probably
makes other debuggers crash or refuse to read the program. If you want
to control for certain whether t...
Can't find Request.GetOwinContext
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I have this problem and I download extra package from nuget to solve my problem,(run following command in Package Manager Console)
Install-Package Microsoft.Owin.Host.SystemWeb
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Split value from one field to two
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Unfortunately MySQL does not feature a split string function. However you can create a user defined function for this, such as the one described in the following article:
MySQL Split String Function by Federico Cargnelutti
With that function:
DELIMITER $$
CREATE ...
What is your naming convention for stored procedures? [closed]
... have multiple applications calling the same procedure then you need to be extra careful, any modification to that proc could break those multiple apps. Naming wise, it is a grey area, but you could name it common/global or anything you see fit. @localghosts: thanks for being informative.
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how to check if a file is a directory or regular file in python? [duplicate]
...if you've already got a stat structure, this allows you to avoid making an extra system call / disk seek via os.path.isfile or friends.
– Joshua Richardson
May 12 '14 at 18:39
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“The file ”MyApp.app“ couldn't be opened because you don't have permission to view it” when running
...nce:
<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleExecutable</key>
- <string>iOS</string>
+ <string>${EXECUTABLE_NAME}</string>
<key>CFBundleIdentifier</key>
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Getting a map() to return a list in Python 3.x
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I guess because it's more verbose, you have to write an extra variable (twice)... If the operation is more complex and you end up writing a lambda, or you need also to drop some elements, I think a comprehension is definitively better than a map+filter, but if you already have the...