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If string is empty then return some default value
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ActiveSupport adds a presence method to all objects that returns its receiver if present? (the opposite of blank?), and nil otherwise.
Example:
host = config[:host].presence || 'localhost'
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When to use valueChangeListener or f:ajax listener?
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The valueChangeListener will only be invoked when the form is submitted and the submitted value is different from the initial value. It's thus not invoked when only the HTML DOM change event is fired. If you would like to submit the form during the HTML DOM change event, then you...
How to show multiline text in a table cell
...pre applied to the appropriate <td>. To do this to all table cells, for example:
td { white-space:pre }
Alternatively, if you can change your markup, you can use a <pre> tag around your content. By default web browsers use their user-agent stylesheet to apply the same white-space:pre ...
Abstraction VS Information Hiding VS Encapsulation
Can you tell me what is the difference between abstraction and information hiding in software development?
22 Answers
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Do you put unit tests in same project or another project?
Do you put unit tests in the same project for convenience or do you put them in a separate assembly?
15 Answers
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annotation to make a private method public only for test classes [duplicate]
Who has a solution for that common need.
12 Answers
12
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How do I use extern to share variables between source files?
I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope?
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Stretch and scale CSS background
Is there a way to get a background in CSS to stretch or scale to fill its container?
16 Answers
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Why not use java.util.logging?
For the first time in my life I find myself in a position where I'm writing a Java API that will be open sourced. Hopefully to be included in many other projects.
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What are the differences between the threading and multiprocessing modules?
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What Giulio Franco says is true for multithreading vs. multiprocessing in general.
However, Python* has an added issue: There's a Global Interpreter Lock that prevents two threads in the same process from running Python code at the same time. This means tha...