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Python Pandas: Get index of rows which column matches certain value
... frame (whose data may be gibabytes). What about dftest? Doesn't this also allocate a very large intermediate object where the returned index may be very small, or even empty. Are these magically optimized away using lazy views. If not then surely there must be an efficient way.
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Efficiency of premature return in a function
...ntation that would give meaningfully different flow graphs for those two examples. About the only difference you might see is that the two different do-somethings get swapped - and even that may well be undone in many implementations to optimise branch prediction or for some other issue where the pl...
Try catch statements in C
...egree with setjmp and longjmp calls.
static jmp_buf s_jumpBuffer;
void Example() {
if (setjmp(s_jumpBuffer)) {
// The longjmp was executed and returned control here
printf("Exception happened here\n");
} else {
// Normal code execution starts here
Test();
}
}
void Test() {
...
IIS7 Permissions Overview - ApplicationPoolIdentity
... @JamesToomey can u verify that if browsers can be lunched from IIS -> php or not like executing commands like cmd /c start chrome /new-window www.google.com or executing chrome bin with path
– user889030
Jul 1 at 5:07
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What's the best way to use R scripts on the command line (terminal)?
...ly invoke them using /path/to/my/bash myscript or explicitly set the path & invoke them using env script. EOT
– michael
Jul 7 '19 at 5:23
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How do I undo the most recent local commits in Git?
... answer:
How can I move HEAD back to a previous location? (Detached head) & Undo commits
The above answer will show you git reflog, which you can use to determine the SHA-1 for the commit to which you wish to revert. Once you have this value, use the sequence of commands as explained above.
1 N...
How to detect a Christmas Tree? [closed]
...limits which are fairly challenging for some of the larger images in this sample. Therefore, for a few of the larger images, I actually had to "decimate" (i.e., retain only every 3rd or 4th pixel and drop the others) each cluster in order to stay within this limit. As a result of this culling proc...
Adding a parameter to the URL with JavaScript
... need to submit a request but add a parameter to the end of the URL, for example:
32 Answers
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Delete/Reset all entries in Core Data?
...oreCoordinator = ...;
[storeCoordinator removePersistentStore:store error:&error];
[[NSFileManager defaultManager] removeItemAtPath:storeURL.path error:&error];
Then, just add the persistent store back to ensure it is recreated properly.
The programmatic way for iterating through each ent...
Iterate over a list of files with spaces
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Seems like pointing out the obvious, but in nearly all simple cases, -exec is going to be cleaner than an explicit loop: find . -iname "foo*" -exec echo "File found: {}" \;. Plus, in many cases you can replace that last \; with+ to put lots of files in the one command.
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