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- c++ - . c vs . cc vs. . cpp vs . hpp vs . h vs . cxx - Stack Overflow
Historically, the first extensions used for C++ were c and h, exactly like for C This caused practical problems, especially the c which didn't allow build systems to easily differentiate C++ and C files
- Regular Expression to validate xx-xxxxxxx or xxx-xx-xxxx
string1 = xxx-xx-xxxx or string1 = xx-xxxxxxx How can I make the regex accept both kinds of values for the same element? The x's represent numbers only so total number of digits = 9 (anything between 0-9) total number of elements in the value is either 11 or 10 depending on which format and total number of dashes is either 2 or 1
- Difference between Xms and Xmx and XX:MaxPermSize
-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to indicate gigabytes References: How is the java memory pool divided?
- What are the -Xms and -Xmx parameters when starting JVM?
The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool
- Validation for xxx-xxx-xxxx or (xxx)xxx-xxxx - Stack Overflow
Possible Duplicate: A comprehensive regex for phone number validation Whats the regex for xxx-xxx-xxxx or (xxx)xxx-xxxx I can create regex for the first one with ^\d{3}-\d{3}-\d{4}$ but how
- Increase heap size in Java - Stack Overflow
-XX:MaxRAMPercentage=percent The MaxRAMPercentage parameter allows setting the maximum heap size for a JVM running with a large amount of memory (greater than 200 MB) This is the option that can be used for the case mentioned in the question:-XX:MaxRAMPercentage=75 -XX:MinRAMPercentage=percent
- how to increase java heap memory permanently? - Stack Overflow
There is also parameter -XX:MaxPermSize=256m which changes memory reserved for permanent generation If your application runs as windows service, in Control panels -> Administration tools -> Services you can add some run parameters to your service
- linux - Username is not in the sudoers file. This incident will be . . .
After logging into ssh in a Linux machine, I got this message: 'Username' is not in the sudoers file This incident will be reported
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