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Why is “int i = 2147483647 + 1;” OK, but “byte b = 127 + 1;” is not compilable?
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Constants are evaluated as ints, so 2147483647 + 1 overflows and gives you a new int, which is assignable to int, while 127 + 1 also evaluated as int equals to 128, and it is not assignable to byte.
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What's the valid way to include an image with no src?
...hich won't cause server hits. I recently had a similar issue with iframes and determined //:0 to be the best option. No, really!
Starting with // (omitting the protocol) causes the protocol of the current page to be used, preventing "insecure content" warnings in HTTPS pages. Skipping the host n...
Principles for Modeling CouchDB Documents
... the source document from which the emit was made. I left it out for space and readability.
We can then use the 'start_key' and 'end_key' parameters to filter the results down to a single post's data: ?start_key=["123412804910820"]&end_key=["123412804910820", {}, {}] Or even specifically extrac...
Html.ActionLink as a button or an image, not a link
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Late response but you could just keep it simple and apply a CSS class to the htmlAttributes object.
<%= Html.ActionLink("Button Name", "Index", null, new { @class="classname" }) %>
and then create a class in your stylesheet
a.classname
{
background: url(../Im...
When should we use intern method of String on String literals
...in String pool, otherwise a new string object will be added in String pool and the reference of this String is returned.
1...
Are there any O(1/n) algorithms?
...put size for which the algorithm is not supposed to execute any operation. And therefore I would think that O(1/n) time complexity is indeed impossible to achieve.
– Roland Ewald
May 25 '09 at 14:10
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How to search for occurrences of more than one space between words in a line
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[ ]{2,}
SPACE (2 or more)
You could also check that before and after those spaces words follow. (not other whitespace like tabs or new lines)
\w[ ]{2,}\w
the same, but you can also pick (capture) only the spaces for tasks like replacement
\w([ ]{2,})\w
or see that before and af...
How to get file creation & modification date/times in Python?
...on date in a cross-platform way is easy - just call os.path.getmtime(path) and you'll get the Unix timestamp of when the file at path was last modified.
Getting file creation dates, on the other hand, is fiddly and platform-dependent, differing even between the three big OSes:
On Windows, a file'...
What's the false operator in C# good for?
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You can use it to override the && and || operators.
The && and || operators can't be overridden, but if you override |, &, true and false in exactly the right way the compiler will call | and & when you write || and &&.
For example, ...
Get list of data-* attributes using javascript / jQuery
...ir associated value (this
includes booleans, numbers, objects,
arrays, and null). The data-
attributes are pulled in the first
time the data property is accessed and
then are no longer accessed or mutated
(all data values are then stored
internally in jQuery).
The jQuery.fn.data func...