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Iterate all files in a directory using a 'for' loop
...e time.
Just use cygwin with its bash for much more functionality.
Apart from this: Did you notice, that the buildin help of MS Windows is a great resource for descriptions of cmd's command line syntax?
Also have a look here: http://technet.microsoft.com/en-us/library/bb490890.aspx
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Get keys from HashMap in Java
...ke BidiMap (a map that allows bidirectional lookup between key and values) from Apache's Commons Collections - also be aware that several different keys could be mapped to the same value.
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Cannot import XSSF in Apache POI
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For OOXML to work you need the POI-OOXML jar which is separately packaged from the POI jar.
Download the POI-OOXML jar from the following location -
http://repo1.maven.org/maven2/org/apache/poi/poi-ooxml/3.11/poi-ooxml-3.11.jar
For Maven2 add the below dependency -
<dependency>
<gr...
How to analyze a java thread dump?
... explains what that waiting on means:
A lock prevents more than one entity from accessing a shared resource. Each object in Java™ has an associated lock (gained by using a synchronized block or method). In the case of the JVM, threads compete for various resources in the JVM and locks on Java obje...
Showing the stack trace from a running Python application
I have this Python application that gets stuck from time to time and I can't find out where.
28 Answers
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Convert a Git folder to a submodule retrospectively?
...ul as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is in its own folder.
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The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
...tch and handle your server-side errors - do not let .NET exceptions travel from the server to the client - always wrap those into interoperable SOAP faults. Check out the WCF IErrorHandler interface and implement it on the server side
if you're about to send a second message onto your channel from t...
filename and line number of python script
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Thanks to mcandre, the answer is:
#python3
from inspect import currentframe, getframeinfo
frameinfo = getframeinfo(currentframe())
print(frameinfo.filename, frameinfo.lineno)
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Interfaces vs. abstract classes [duplicate]
...s. However, they are typically more flexible as a type can only be derived from one class, but can implement any number of interfaces.
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Unlink of file Failed. Should I try again?
...could mean that another program is using the file, which is preventing git from "moving" the file into or out of the working directory when you are attempting to change branches.
I have had this happen on Windows Vista where eclipse is the program "using" the file. The file may not be actually ope...