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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-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to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?
- Decoding facebooks blob video url - Stack Overflow
I found blob:https: www facebook com c7e5a634-2343-4464-a03e-4a1987301ca1 video source on Facebook's private group and I really can't download the video by entering
- 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
- Host xxx. xx. xxx. xxx is not allowed to connect to this MySQL server
The message *Host ''xxx xx xxx xxx'' is not allowed to connect to this MySQL server is a reply from the MySQL server to the MySQL client Notice how its returning the IP address and not the hostname Notice how its returning the IP address and not the hostname
- 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
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