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What reason is there to use null instead of undefined in JavaScript?
...ect was expected (or that there was an error). My problem with that is its completely arbitrary, and totally unnecessary.
That said, there is one major difference - variables that aren't initialized (including function parameters where no argument was passed, among other things) are always undefin...
How to convert existing non-empty directory into a Git working directory and push files to a remote
...l> and an empty repository:
cd <localdir>
git init
git add .
git commit -m 'message'
git remote add origin <url>
git push -u origin master
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Iterating through a range of dates in Python
...ample if you only wanted weekdays, you would just swap in bdate_range. See http://pandas.pydata.org/pandas-docs/stable/timeseries.html#generating-ranges-of-timestamps
The power of Pandas is really its dataframes, which support vectorized operations (much like numpy) that make operations across larg...
No connection could be made because the target machine actively refused it?
Sometimes I get the following error while I was doing HttpWebRequest to a WebService. I copied my code below too.
28 Answer...
What is the difference between require() and library()?
...parameter of install.packages(), such as
install.packages(package, repos="http://cran.us.r-project.org")
You can wrap require() and library() in suppressPackageStartupMessages() to, well, suppress package startup messages, and also use the parameters require(..., quietly=T, warn.conflicts=F) if ne...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
...them in the first place. One option which I have used in the past is "JMP" http://www.khelekore.org/jmp/.
If you determine that you are allocating these objects for a reason and you need to keep around references (depending on what you are doing this might be the case), you will just need to increa...
Clone private git repo with dockerfile
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Simulate low network connectivity for Android [closed]
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For simulating latency over HTTP, use ResponseCache.setDefault(new CacheResponse(){...}) and put a Thread.sleep(200) call in there. This has the advantage of being programatically controlled (i.e. only just in one activity) and not affecting other proce...
SSH to Elastic Beanstalk instance
... onto the server.
$ ssh -i path/to/keypair.pub ec2-user@ec2-an-ip-address.compute-1.amazonaws.com
Note: For adding a keypair to the environment configuration, the instances' termination protection must be off as Beanstalk would try to terminate the current instances and start new instances with t...
Python CSV error: line contains NULL byte
...") as src:
reader= csv.reader( src )
The mode must be "rb" to read.
http://docs.python.org/library/csv.html#csv.reader
If csvfile is a file object, it must be opened with the ‘b’ flag on platforms where that makes a difference.
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