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Adding a directory to $LOAD_PATH (Ruby)
...one new to Ruby will be pondering what $:. is.
I find this more obvious.
libdir = File.dirname(__FILE__)
$LOAD_PATH.unshift(libdir) unless $LOAD_PATH.include?(libdir)
Or if I care about having the full path...
libdir = File.expand_path(File.dirname(__FILE__))
$LOAD_PATH.unshift(libdir) unless $...
What is the LD_PRELOAD trick?
... to the path of a shared object, that file will be loaded before any other library (including the C runtime, libc.so). So to run ls with your special malloc() implementation, do this:
$ LD_PRELOAD=/path/to/my/malloc.so /bin/ls
...
Where can I find the Java SDK in Linux after installing it?
...ion of the java command. On the OpenSUSE system I'm on now it returns /usr/lib64/jvm/java-1.6.0-openjdk-1.6.0/jre/bin/java (but this is not a system which uses apt-get).
On Ubuntu, it looks like it is in /usr/lib/jvm/java-6-openjdk/ for OpenJDK, and in some other subdirectory of /usr/lib/jvm/ for...
Unable to find valid certification path to requested target - error even after cert imported
... File dir = new File(System.getProperty("java.home") + SEP
+ "lib" + SEP + "security");
file = new File(dir, "jssecacerts");
if (file.isFile() == false) {
file = new File(dir, "cacerts");
}
}
System.out.println("Loading KeyStore " + file + "...");...
Visual C++: How to disable specific linker warnings?
I'm using a library from CGAL which during the linking stage of my code compilation produces a lot of linking warnings of this form:
...
Error: Configuration with name 'default' not found in Android Studio
I am using the volley library to perform network operation in android. So I am trying to add this library in my project which is created in Android Studio and gradle system.
...
How to tell if JRE or JDK is installed
...e:
so as it's obvious in the screenshot, my Java home directory is /usr/lib/jvm/java-11-openjdk-amd64. So accordingly I need to add JAVA_HOME to my bash profile (.bashrc, .bash_profile, etc. depending on your OS) like below:
JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
Here you go!
...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...elay Product on TCP Throughput，此外知乎上的讨论也值得一看：为什么多 TCP 连接分块下载比单连接下载快，大家有货的话也请告诉我。
TCP 优化
Failed to install Python Cryptography package with PIP and setup.py
...
I had a similar issue, and found I was simply missing a dependency (libssl-dev, for me). As referenced in https://cryptography.io/en/latest/installation/, ensure that all dependencies are met:
On Windows
If you’re on Windows you’ll need to make sure you have OpenSSL installed. There are p...
Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;
... Path
In Java Build Path, go to the tab Order and Export
Uncheck your .jar library
Only sometimes:
In Order and Export tab I did not have any jar library there, so I have unchecked Android Private Libraries item. Now my project is running.
...