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Logging levels - Logback - rule-of-thumb to assign log levels
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from logback documentation:
In a more graphic way, here is how the selection rule works. In the following table, the vertical header shows the level of the logging request, designated by p, while the horizontal header shows effective level of the logger, designated by q. The intersection of ...
Integrating the ZXing library directly into my Android application
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Navigate to the newly extracted folder and open the core directory and select core.jar ... hit enter!
Now you just have to correct a few errors in the translations and the AndroidManifest.xml file :) Now you can happily compile, and you will now have a working standalone barcode scanner app, b...
How to parse an RSS feed using JavaScript?
...t()) you'll want to inject to display your data.
Injecting the content
Select the container element that you want on the page and append your document fragments to it, and simply use innerHTML to replace its content entirely.
Something like:
$('#rss-viewer').append(aDocumentFragmentEntry);
o...
What are the best PHP input sanitizing functions?
... much more thorough job of both stripping out all HTML and also allowing a selective whitelist of tags and attributes through.
Modern PHP versions ship with the filter extension, which provides a comprehensive way to sanitize user input.
Validation
Making sure that submitted data is free from unexpe...
How can I use Autolayout to set constraints on my UIScrollview?
...ication.
Storyboard
In this example we will make a horizontal scroll view. Select the View Controller and then choose Freeform in the Size Inspector. Make the width 1,000 and the height 300. This just gives us room on the storyboard to add content that will scroll.
Add a Scroll View
Add a UIScrollV...
Understanding the Event Loop
... of queues of stuff that needs doing and every "tick" of the event loop it selects one, removes it from the queue, and runs it.
A key thing to understand is that node relies on the OS for most of the heavy lifting. So incoming network requests are actually tracked by the OS itself and when node is ...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...e index.jsp.
Project->Properties
Click on Run
Relative URL:/index.jsp (Select your project root URL)
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How do cache lines work?
...(DDR1/2/3/4 SDRAM burst transfer size is configurable up to 64B; CPUs will select the burst transfer size to match their cache line size, but 64B is common)
As a rule of thumb, if the processor can't forecast a memory access (and prefetch it), the retrieval process can take ~90 nanoseconds, or ~250...
Load view from an external xib file in storyboard
...you want to use it in your storyboard, add a UIView as you normally would, select the newly added view, go to the Identity Inspector (the third icon on the upper right that looks like a rectangle with lines in it), and enter your subclass's name in as the "Class" under "Custom Class".
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How to upload files to server using JSP/Servlet?
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Introduction
To browse and select a file for upload you need a HTML <input type="file"> field in the form. As stated in the HTML specification you have to use the POST method and the enctype attribute of the form has to be set to "multipart/form-...