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Using the RUN instruction in a Dockerfile with 'source' does not work
... Eh? If you source a script inside a shell that only exists for the command, it's not able to have a lasting effect on any future commands run, assuming that the sum total of its action is setting environment variables. So why would you use source at all, vs just bash /usr/local/bin/virtualenvwra...
Benefit of using Parcelable instead of serializing object
As I understand, Bundle and Parcelable belongs to the way Android performs serialization in. It is used for example in passing data between activities. But I wonder, if there are any benefits in using Parcelable instead of classic serialization in case of saving state of my business objects to...
cannot load such file — zlib even after using rvm pkg install zlib
I installed zlib package and ruby 1.9.3 using rvm, but whenever I try to install
gems it says
cannot load such file -- zlib
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How can I do test setup using the testing package in Go
...outlined here in the Main section:
TestMain runs in the main goroutine and can do whatever setup and
teardown is necessary around a call to m.Run. It should then call
os.Exit with the result of m.Run
It took me some time to figure out that this means that if a test contains a function func...
ExecJS::RuntimeError on Windows trying to follow rubytutorial
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My friend was attempting a Rails tutorial on Win 8 RTM a few months ago and ran into this error. Not sure if this issue exists in Windows 7 as well, but this may help.
Options:
1) Removing //= require_tree . / Ignoring the issue - As ColinR stated above, this line should not be causing an issue...
How to find out what group a given user has?
In Unix/Linux, how do you find out what group a given user is in via command line?
5 Answers
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abort, terminate or exit?
What's the difference between those three, and how shall I end program in case of exception which I can't handle properly?
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Using the rJava package on Win7 64 bit with R
... for Windows x86. On Win 64, the former installs in C:\Program files\Java\ and the latter in C:\Program Files (x86)\Java\ so they do not conflict.
As of Java version 9, support for x86 (win32) has been discontinued. Hence the latest working multi-arch setup is to install both jdk-8u172-windows-i58...
What is the native keyword in Java for?
... actual implementation doesn’t have to use JNI. Certain JRE methods are handled intrinsically by the JVM. In fact, it’s not even mandatory that the implementation is actually native code. It’s just “implemented in a language other than the Java programming language”.
–...
How can I get a precise time, for example in milliseconds in Objective-C?
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NSDate and the timeIntervalSince* methods will return a NSTimeInterval which is a double with sub-millisecond accuracy. NSTimeInterval is in seconds, but it uses the double to give you greater precision.
In order to calculate milli...