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R - Concatenate two dataframes?
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Clearer and easier than hacking in extra columns just to please rbind; this is the right way forward. Avoiding extremely common packages like plyr when it offers the right tools for the job is simply not sensible.
– Jack Aidley
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How to get the current time in milliseconds from C in Linux?
...would need to increment s when this happens. Probably a rare event but the extra digit can cause trouble.
– Mike
Dec 27 '17 at 0:55
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How to change cursor from pointer to finger using jQuery?
...l! Act now and you'll get the hand functions position & ishover for no extra charge! That's right, 2 very handy cursor functions ... FREE!
They work as simple as seen in the demo:
$("h3").cursor("isHover"); // if hovering over an h3 element, will return true,
// else false
// also handy ...
Windows threading: _beginthread vs _beginthreadex vs CreateThread C++
...inthread/_endthread and the "ex" versions:
1) _beginthreadex takes the 3 extra parameters to CreateThread
which are lacking in _beginthread():
A) security descriptor for the new thread
B) initial thread state (running/asleep)
C) pointer to return ID of newly created thread
2) The r...
How does “do something OR DIE()” work in PHP?
...'s with statement, when it's actually just a boolean expression... I think extra care should be taken when using this expression if you're expected to perform a cleanup in case of errors. Please, correct me if I'm wrong, but if you do func_call($file) or die(); and the function fails, then the file ...
Position icons into circle
...g CSS:
.container {
--d: 6.5em; /* image size */
--rel: 1; /* how much extra space we want between images, 1 = one image size */
--r: calc(.5*(1 + var(--rel))*var(--d)/var(--tan)); /* circle radius */
--s: calc(2*var(--r) + var(--d)); /* container size */
position: relative;
width: var(-...
deleting rows in numpy array
...tected. In this case, the short-circuiting should be a draw, but doing the extra not should make it slower in my opinion.
– Justin Peel
Oct 11 '10 at 2:28
add a comment
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Redis is single-threaded, then how does it do concurrent I/O?
...-threaded event loop. The interesting point is atomicity is provided at no extra cost (it does not require synchronization). It can be exploited by the user to implement optimistic locking and other patterns without paying for the synchronization overhead.
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Colspan all columns
...>
</table>
Don't
<div>
<div style="float: left;/* extra styling /*"><!-- Title of table --></div>
<table>
<thead><!-- ... --></thead>
<tbody><!-- ... --></tbody>
</table>
<div style...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
...e over 20% of all their transactions - processing manually certainly takes extra time and in one case they have an employee who does nothing but process transactions, but the cost of paying his salary is apparently less than their exposure if they just passed cc numbers though an online gateway.
Bo...