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Design Patterns: Factory vs Factory method vs Abstract Factory
...ional patterns:
Design start out using Factory Method (less complicated, more customizable, subclasses proliferate) and evolve toward Abstract Factory, Prototype, or Builder (more flexible, more complex) as the designer discovers where more flexibility is needed
Abstract Factory classes are ofte...
What are the differences between “=” and “
...ng otherwise. Even the R documentation of ?assignOps claims that there are more differences:
The operator <- can be used anywhere,
whereas the operator = is only allowed at the top level (e.g.,
in the complete expression typed at the command prompt) or as one
of the subexpressions in a ...
.NET obfuscation tools/strategy [closed]
...ant to copy that they will anyway, and obfuscation won't even make it much more difficult. In particular as algorithms are all operators obfuscation doesn't have much effect on them - they're usually one of the easiest things to extract.
– Keith
Jul 10 '09 at 1...
Clear a terminal screen for real
...;c which is the VT100 escape code for resetting the terminal. Here is some more information on terminal escape codes.
Edit
Here are a few other ways of doing it...
printf "\ec" #\e is ESC in bash
echo -en "\ec" #thanks @Jonathon Reinhart.
# -e Enable interpretation of of backslash escapes
# -n...
Do a “git export” (like “svn export”)?
...rmat zip --output /full/path/to/zipfile.zip master
git help archive for more details, it's quite flexible.
Be aware that even though the archive will not contain the .git directory, it will, however, contain other hidden git-specific files like .gitignore, .gitattributes, etc. If you don't wan...
Getting a map() to return a list in Python 3.x
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Is async HttpClient from .Net 4.5 a bad choice for intensive load applications?
...s version would have produced better results because there would have been more CPU time available for the threads performing CPU operations, which are the ones that actually need it (threads waiting for I/O operations to complete are just wasting).
As a conclusion to my tests, asynchronous HTTP ca...
What's invokedynamic and how do I use it?
... can do with it; if you're a tool creator, though, you can use it to build more flexible, more efficient JVM-based languages. Here is a really sweet blog post that gives a lot of detail.
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Why is #!/usr/bin/env bash superior to #!/bin/bash?
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@JulioGuerra Much like having a /usr/lib/sendmail (or, more recently, /usr/sbin/sendmail) binary available to process mail, it's in a Unix-like system's best interest to have /usr/bin/env because the env shebang is such common practice. It is a de facto standard interface.
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PHP: If internet explorer 6, 7, 8 , or 9
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I changed it to [4-8]. IE updates are getting more and more frequent and I really want to make sure I don't have to make a similar change during the lifetime of the web app I'm working on (as it only has a lifespan of 3 years). If someone is browsing the web with IE 5 or...