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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...undSync] replSet not trying to sync from 192.168.1.138:27017, it is vetoed for 10 more seconds
Sun Dec 29 22:03:05.499 [rsHealthPoll] DBClientCursor::init call() failed
Sun Dec 29 22:03:05.499 [rsHealthPoll] replset info 192.168.1.138:27017 heartbeat failed, retrying
Sun Dec 29 22:03:05.501 [rsHe...
C++11 reverse range-based for-loop
...of iterators so I can iterate over a container in reverse with range-based for-loop?
8 Answers
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__proto__ VS. prototype in JavaScript
...d used as the prototype while Myconstructure.prototype is just a blueprint for __proto__ which, is infact the actual object saved and used as the protoype. Hence myobject.prototype wouldnt be a property of the actual object because its just a temporary thing used by the constructor function to out...
What are 'closures' in .NET?
...e's always more to learn :) I've just finished reading CLR via C# - very informative. Other than that, I usually ask Marc Gravell for WCF/binding/expression trees, and Eric Lippert for C# language things.
– Jon Skeet
Jan 9 '09 at 16:18
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Eclipse returns error message “Java was started but returned exit code = 1”
...ing (noting the new line):
/!\ make sure, that the -vm option occurs before the -vmargs command.
Everything after -vmargs is passed directly to the JVM.
-vm
c:/wherever/java/jdk1.6.0_21/jre/bin/server/jvm.dll
-vmargs...
...to your eclipse.ini file, pointing to the JDK you want to use, a...
How to create a video from images with FFmpeg?
...f you encounter problems, such as the first image is skipped or only shows for one frame, then use the fps video filter instead of -r for the output framerate
ffmpeg -r 1/5 -i img%03d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4
Alternatively the format video filter can be added to th...
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
...
The regular expression for this is really simple. Just use a character class. The hyphen is a special character in character classes, so it needs to be first:
/[-!$%^&*()_+|~=`{}\[\]:";'<>?,.\/]/
You also need to escape the other reg...
Use find command but exclude files in two directories
...to find that you only want files in the results
-name "*_peaks.bed" - Look for files with the name ending in _peaks.bed
! -path "./tmp/*" - Exclude all results whose path starts with ./tmp/
! -path "./scripts/*" - Also exclude all results whose path starts with ./scripts/
Testing the Solution:
$ ...
How to convert an enum type variable to a string?
... to make printf to show the values of variables which are of an enum type? For instance:
33 Answers
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Getting MAC Address
I need a cross platform method of determining the MAC address of a computer at run time. For windows the 'wmi' module can be used and the only method under Linux I could find was to run ifconfig and run a regex across its output. I don't like using a package that only works on one OS, and parsing ...