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Is there a use-case for singletons with database access in PHP?
...bsolutely sure that you'll never have more than one instance of, you eventually have a second. You may end up with a second monitor, a second database, a second server--whatever.
When this happens, if you have used a static class you're in for a much worse refactor than if you had used a singleton...
How to print colored text in Python?
... the output to a file; while tools like cat may support colors, it is generally better to not print color information to files.
– Sebastian Mach
Apr 9 '14 at 6:27
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What is the difference between Amazon SNS and Amazon SQS?
...u may not want an external service to make connections to your hosts (firewall may block all incoming connections to your host from outside). Your end point may just die because of heavy volume of messages. Email and SMS maybe not your choice of processing messages quickly. By coupling SNS with SQS,...
Matplotlib transparent line plots
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After I plotted all the lines, I was able to set the transparency of all of them as follows:
for l in fig_field.gca().lines:
l.set_alpha(.7)
EDIT: please see Joe's answer in the comments.
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What are the differences between Generics in C# and Java… and Templates in C++? [closed]
... my voice to the noise and take a stab at making things clear:
C# Generics allow you to declare something like this.
List<Person> foo = new List<Person>();
and then the compiler will prevent you from putting things that aren't Person into the list.
Behind the scenes the C# compiler is j...
Is it safe to use Project Lombok? [closed]
...tations and even simple JavaBean like generation with @Data . It could really help me, especially in 50 different event objects where you have up to 7 different fields that need to be constructed and hidden with getters. I could remove almost a thousand lines of code with this.
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How can I get Git to follow symlinks?
...o store symlinks instead of following them (for compactness, and it's generally what people want).
However, I accidentally managed to get it to add files beyond the symlink when the symlink is a directory.
I.e.:
/foo/
/foo/baz
/bar/foo --> /foo
/bar/foo/baz
by doing
git add /bar/fo...
Wrapping a C library in Python: C, Cython or ctypes?
I want to call a C library from a Python application. I don't want to wrap the whole API, only the functions and datatypes that are relevant to my case. As I see it, I have three choices:
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Lock Escalation - What's happening here?
... to take fewer, larger locks (e.g. entire table) instead of locking many smaller things (e.g. row locks).
But this can be problematic when you have a huge table, because taking a lock on the entire table may lock out other queries for a long time. That's the tradeoff: many small-granularity locks...
R cannot be resolved - Android error
I just downloaded and installed the new Android SDK. I wanted to create a simple application to test drive it.
108 Answers
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