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What is a stack trace, and how can I use it to debug my application errors?
...hrow new IllegalStateException("A book has a null property", e)
39 }
40 }
This might give you a stack trace that looks like:
Exception in thread "main" java.lang.IllegalStateException: A book has a null property
at com.example.myproject.Author.getBookIds(Author.java:38)
at ...
Android- create JSON Array and JSON Object
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What is the difference between encode/decode?
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The decode method of unicode strings really doesn't have any applications at all (unless you ha...
Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of
...central has elapsed or updates are forced -> [Help 1]
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Had maven 3.0.5, eclipse Kepler with JBoss Dev Studio 7 installed. Computer sitting on internal network with proxy to the internet. Here's what I did.
0. Check the maven repositiory server is up
1. Check Proxy is set up and working
Fi...
How to check visibility of software keyboard in Android?
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NEW ANSWER added Jan 25th 2012
Since writing the below answer, someone clued me in to the existence of ViewTreeObserver and friends, APIs which have been lurking in the SDK since version 1.
Rather than requiring a custom Layout type, a much simpler s...
Suppressing deprecated warnings in Xcode
... to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings involving methods that have changed or been superseded:
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Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
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How to draw rounded rectangle in Android UI?
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In your layout xml do the following:
<shape xmlns:android="http://schemas.android.com/apk/re...
How do I get a value of datetime.today() in Python that is “timezone aware”?
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In the standard library, there is no cross-platform way to create aware timezones without creati...
Difference between malloc and calloc?
...em with virtual memory.)
Some compilers even can optimize malloc + memset(0) into calloc for you, but you should use calloc explicitly if you want the memory to read as 0.
If you aren't going to ever read memory before writing it, use malloc so it can (potentially) give you dirty memory from its i...