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How can I get useful error messages in PHP?
Quite often I will try and run a PHP script and just get a blank screen back. No error message; just an empty screen. The cause might have been a simple syntax error (wrong bracket, missing semicolon), or a failed function call, or something else entirely.
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Eclipse “Invalid Project Description” when creating new project from existing source
... that project from the source code before, but then I deleted that project and deleted its whole directory, before adding the source code directory again. I tried everything like cleaning and restarting, but nothing worked. I looked in my workspace directory, but there are no traces for the old proj...
When should I use the Visitor Design Pattern? [closed]
...dmit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it.
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How do I install a NuGet package .nupkg file locally?
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Menu Tools → Options → Package Manager
Give a name and folder location. Click OK. Drop your NuGet package files in that folder.
Go to your Project, right click and select "Manage NuGet Packages" and select your new package source.
Here is the documentation.
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How does the new automatic reference counting mechanism work?
...es to Objective-C has to learn the rigid rules of when to retain, release, and autorelease objects. These rules even specify naming conventions that imply the retain count of objects returned from methods. Memory management in Objective-C becomes second nature once you take these rules to heart an...
Batch Renaming of Files in a Directory
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Such renaming is quite easy, for example with os and glob modules:
import glob, os
def rename(dir, pattern, titlePattern):
for pathAndFilename in glob.iglob(os.path.join(dir, pattern)):
title, ext = os.path.splitext(os.path.basename(pathAndFilename))
o...
How is it possible to declare nothing inside main() in C++ and yet have a working application after
...uted where you can do anything — in this case, compute fibonacci numbers and print them! A similar thing I've shown in the following question (which I had asked long back):
Is main() really start of a C++ program?
Note that such code is not safe and should be best avoided in general. For exam...
Prevent errors from breaking / crashing gulp watch
I'm running gulp 3.6.2 and have the following task that was set up from a sample online
8 Answers
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Update multiple rows in same query using PostgreSQL
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You can also use update ... from syntax and use a mapping table. If you want to update more than one column, it's much more generalizable:
update test as t set
column_a = c.column_a
from (values
('123', 1),
('345', 2)
) as c(column_b, column_a)
wher...
How to automatically generate a stacktrace when my program crashes
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For Linux and I believe Mac OS X, if you're using gcc, or any compiler that uses glibc, you can use the backtrace() functions in execinfo.h to print a stacktrace and exit gracefully when you get a segmentation fault. Documentation can...