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Is gcc std::unordered_map implementation slow? If so - why?
...e wrote a benchmark to figure out, how much slower our concurrent hash map is compared with std::unordered_map .
3 Answers...
Better way to check variable for null or empty string?
Since PHP is a dynamic language what's the best way of checking to see if a provided field is empty?
10 Answers
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How can I use numpy.correlate to do autocorrelation?
... need to do auto-correlation of a set of numbers, which as I understand it is just the correlation of the set with itself.
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YouTube iframe API: how do I control an iframe player that's already in the HTML?
I want to be able to control iframe based YouTube players. This players will be already in the HTML, but I want to control them via the JavaScript API.
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Should arrays be used in C++?
Since std::list and std::vector exist, is there a reason to use traditional C arrays in C++, or should they be avoided, just like malloc ?
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Associative arrays in Shell scripts
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To add to Irfan's answer, here is a shorter and faster version of get() since it requires no iteration over the map contents:
get() {
mapName=$1; key=$2
map=${!mapName}
value="$(echo $map |sed -e "s/.*--${key}=\([^ ]*\).*/\1/" -e 's/:SP:/ /g'...
Use 'import module' or 'from module import'?
I've tried to find a comprehensive guide on whether it is best to use import module or from module import . I've just started with Python and I'm trying to start off with best practices in mind.
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How do you create a random string that's suitable for a session ID in PostgreSQL?
..., so I tried SELECT md5(random()) , but that doesn't work. How can I do this?
12 Answers
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custom listview adapter getView method being called multiple times, and in no coherent order
I have a custom list adapter:
11 Answers
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Calling clojure from java
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Update: Since this answer was posted, some of the tools available have changed. After the original answer, there is an update including information on how to build the example with current tools.
It isn't quite as simple as compiling to a j...