|
- 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
- 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-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to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?
- 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
- 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
- Difference between -XX:+UseParallelGC and -XX:+UseParNewGC
Using -XX:+UseParNewGC along with -XX:+UseConcMarkSweepGC, will cause higher pause time for Minor GCs, when compared to -XX:+UseParallelGC This is because, promotion of objects from Young to Old Generation will require running a Best-Fit algorithm (due to old generation fragmentation) to find an address for this object
- 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 extract the direct facebook video url - Stack Overflow
Well i have not tried this in PHP, as per the facebook they have removed option in API to return source for the video, so i got it working using Python ;)
- 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
|
|
|