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How does an underscore in front of a variable in a cocoa objective-c class work?
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From what I understand, Apple recommends against using the underscore prefix on method names (they reserve that for themselves as a convention for private methods), but they don't have any such recommendation about instance v...
Prevent row names to be written to file when using write.csv
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write.csv(t, "t.csv", row.names=FALSE)
From ?write.csv:
row.names: either a logical value indicating whether the row names of
‘x’ are to be written along with ‘x’, or a character vector
of row names to be written.
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What breaking changes are introduced in C++11?
...rtain integer literals larger than can be represented by long could change from an unsigned integer type to signed long long.
Valid C++ 2003 code that uses integer division rounds the result toward 0 or toward negative infinity, whereas C++0x always rounds the result toward 0.
(admittedly n...
Is Big O(logn) log base e?
... run-time.
In big-O() notation, constant factors are removed. Converting from one logarithm base to another involves multiplying by a constant factor.
So O(log N) is equivalent to O(log2 N) due to a constant factor.
However, if you can easily typeset log2 N in your answer, doing so is more pedag...
What is the proper way to test if a parameter is empty in a batch file?
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From IF /?:
If Command Extensions are enabled IF
changes as follows:
IF [/I] string1 compare-op string2 command
IF CMDEXTVERSION number command
IF DEFINED variable command
......
The DEFINED conditional work...
css3 transition animation on load?
... navigation menu sliding into place using CSS3 only:
@keyframes slideInFromLeft {
0% {
transform: translateX(-100%);
}
100% {
transform: translateX(0);
}
}
header {
/* This section calls the slideInFromLeft animation we defined above */
animation: 1s ease-out 0s 1 slideInF...
How to show particular image as thumbnail while implementing share on Facebook?
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From Facebook's spec, use a code like this:
<meta property="og:image" content="http://siim.lepisk.com/wp-content/uploads/2011/01/siim-blog-fb.png" />
Source: Facebook Share
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Is it okay to use now?
...n a mobile phone web app and I have several text fields that could benefit from <input type="tel"/> . iPhones will adjust the keyboard for the user, but I'm worried about breaking backwards compatibility. What I'm hoping is that browsers/phone that support this can assist the user and other b...
How to play audio?
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Notice that from april 2018 on Chrome will not play audio files unless the user has at least clicked once in the document. See here.
– Nils Lindemann
Aug 27 '18 at 21:46
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How do I clear the std::queue efficiently?
...).
In one scenario, I want to clear the queue in one shot( delete all jobs from the queue).
I don't see any clear method available in std::queue class.
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