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Why em instead of px?

... It is wrong to say that one is a better choice than the other (or both wouldn't have been given their own purpose in the spec). It may even be worth noting that StackOverflow makes extensive use of px units. It is not the poor choice Spoike was told it was. Definition of units px is...
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Is there a vim command to relocate a tab?

How can I change the position / order of my current tab in Vim ? For example, if I want to reposition my current tab to be the first tab? ...
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When to use os.name, sys.platform, or platform.system?

... Dived a bit into the source code. The output of sys.platform and os.name are determined at compile time. platform.system() determines the system type at run time. sys.platform is specified as a compiler define during the build configuration. os.name checks whether certain os spec...
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What is the JSF resource library for and how should it be used?

...use it as follows with the common content/file type css , js and img (or image ) as library name depending on the tag used: ...
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What does CultureInfo.InvariantCulture mean?

... Not all cultures use the same format for dates and decimal / currency values. This will matter for you when you are converting input values (read) that are stored as strings to DateTime, float, double or decimal. It will also matter if you try to format...
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How to define hash tables in Bash?

What is the equivalent of Python dictionaries but in Bash (should work across OS X and Linux). 15 Answers ...
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Finding the number of days between two dates

... $now = time(); // or your date as well $your_date = strtotime("2010-01-31"); $datediff = $now - $your_date; echo round($datediff / (60 * 60 * 24)); share | ...
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How do browsers pause/change Javascript when tab or window is not active?

...me user interface tests that need to detect if people are paying attention or not. But, this question is not about the page visibility API . ...
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What does “|=” mean? (pipe equal operator)

...ification.defaults | Notification.DEFAULT_SOUND; where | is the bit-wise OR operator. All operators are referenced here. A bit-wise operator is used because, as is frequent, those constants enable an int to carry flags. If you look at those constants, you'll see that they're in powers of two : ...
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Free space in a CMD shell

Is there a way to get the amount of free diskspace of a disk or a folder in a CMD without having to install some thirdparty applications? ...