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Best practice for Python assert
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To be able to automatically throw an error when x become less than zero throughout the function. You can use class descriptors. Here is an example:
class LessThanZeroException(Exception):
pass
class variable(object):
def __init__(self, value=0):
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Logging in Scala
...ke solution is to use a thunk or cluster to delay the concatenation of the error message. A good example of this is Lift's logger
Log.scala
Slf4jLog.scala
Which looks like this:
class Log4JLogger(val logger: Logger) extends LiftLogger {
override def trace(msg: => AnyRef) = if (isTraceEnable...
自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
... off warnings in CATEGORY
`none' turn off all the warnings
`error' treat warnings as errors
Files which are automatically distributed, if found:
ABOUT-GNU README config.rpath ltcf-gcj.sh
ABOUT-NLS THANKS config.sub ...
bower command not found
...6 Jul 17 2012 git
Here is a node-which attempt:
> which.sync('git')
Error: not found: git
I change the permissions (chomd 755 git).
Now node-which can find it.
> which.sync('git')
'/usr/local/bin/git'
Hope this helps.
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ruby system command check exit code
...=> true
system("echo foo | grep bar") #=> false
Furthermore
An error status is available in $?.
system("VBoxManage createvm --invalid-option")
$? #=> #<Process::Status: pid 9926 exit 2>
$?.exitstatus #=> 2
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Abort a git cherry-pick?
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yes, this doesn't work. Most of the times I get this error: Entry '<unstaged file>' not uptodate. Cannot merge. On the other hand, git reset --merge does work!
– kumarharsh
Jun 4 '14 at 12:02
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How to set environment variables in Python?
...EBUSSY'] = str(myintvariable)
then for retrieval, consider that to avoid errors, you should try
os.environ.get('DEBUSSY', 'Not Set')
possibly substitute '-1' for 'Not Set'
so, to put that all together
myintvariable = 1
os.environ['DEBUSSY'] = str(myintvariable)
strauss = int(os.environ.get('S...
How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
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I tried it but again getting same error Error: The brew link step did not complete successfully
– Chandni
Jul 20 '18 at 2:54
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Selenium wait until document is ready
... I tried this idea in a VB test app. Works most of the time. I get this error sometimes: System.InvalidOperationException : JavaScript error (UnexpectedJavaScriptError) at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse) Test app clicks on level 2 menu link,...
@UniqueConstraint annotation in Java
...nnotating multiple unique keys at the table level, which is why you get an error when applying it to a field.
References (JPA TopLink):
@UniqueConstraint
@Column
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