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What is the meaning of “__attribute__((packed, aligned(4))) ”
... or writes to a memory address, it will do this in word sized chunks (e.g. 4 byte chunks on a 32-bit system). Data alignment means putting the data at a memory offset equal to some multiple of the word size, which increases the system's performance due to the way the CPU handles memory.
To align th...
Passing multiple error classes to ruby's rescue clause in a DRY fashion
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edited Jan 14 '16 at 2:08
user513951
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List files committed for a revision
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244
svn log --verbose -r 42
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Check if a Postgres JSON array contains a string
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4 Answers
4
Active
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What do the different readystates in XMLHttpRequest mean, and how can I use them?
...HttpRequest has 5 readyState s, and I only use 1 of them (the last one, 4 ).
5 Answers
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multiple tags
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142
Yes, absolutely. You can have multiple header, nav, and footer tags sans penalty.
As long as y...
How to prevent gcc optimizing some statements in C?
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Dietrich EppDietrich Epp
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Multiple Parameters for jQuery selector?
...by subclasses which narrow it down. Ah well.
– light24bulbs
Jun 3 '13 at 18:12
3
Is it faster for...
Retina displays, high-res background images
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Do I need to double the size of the .box div to 400px by 400px to
match the new high res background image
No, but you do need to set the background-size property to match the original dimensions:
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) { ...