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What are the aspect ratios for all Android phone and tablet devices?
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║ 5 x 3 ║ 0.6 ║ 1.667... ║
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Why not use Double or Float to represent currency?
...ately represent most simple fractions. For instance, you can't represent 1/3: the decimal representation is repeating (0.3333...), so there is no finite integer that you can multiply by a power of 10 to get 1/3. You could settle on a long sequence of 3's and a small exponent, like 333333333 * 10-10,...
PHP Function Comments
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Josh LeitzelJosh Leitzel
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linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...T udp -- 0.0.0.0/0 224.0.0.251 udp dpt:5353
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:631
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
ACCEPT tcp -- 0.0.0.0/0...
How do I find the time difference between two datetime objects in python?
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388
>>> import datetime
>>> first_time = datetime.datetime.now()
>>> la...
How to increase the gap between text and underlining in CSS
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370
No, but you could go with something like border-bottom: 1px solid #000 and padding-bottom: 3px...
Selecting a row of pandas series/dataframe by integer index
... am curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work.
6 Answers
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Can I set an opacity only to the background image of a div?
...:before pseudo-element
Another trick is to use the CSS 2.1 :before or CSS 3 ::before pseudo-elements. :before pseudo-element is supported in IE from version 8, while the ::before pseudo-element is not supported at all. This will hopefully be rectified in version 10.
HTML
<div class="myDiv">...
Why are hexadecimal numbers prefixed with 0x?
...ramming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicely divisible by 3 = log2(8).
The BCPL language used the syntax 8 1234 for octal numbers. When Ken Thompson created B from BCPL, he used the 0 prefix instead. This is great because
an integer ...