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Which Java Collection should I use?
...hart does not try and cover things like synchronized access, thread safety etc or the legacy collections, but it does cover the 3 standard Sets, 3 standard Maps and 2 standard Lists.
This image was created for this answer and is licensed under a Creative Commons Attribution 4.0 International Lice...
Anaconda vs. EPD Enthought vs. manual installation of Python [closed]
...f Python packages for scientific computing, data science, web development, etc. It also provides a superior environment tool, conda, which allows to easily switch between environments, even between Python 2 and 3. It is also updated very quickly as soon as a new version of a package is released, and...
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
... a keyword. I prefer it to while (true), while (1), while (42), while (!0) etc etc.
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How can jQuery deferred be used?
...ore it's returned immediately from the cache. Otherwise, an AJAX request fetches the data and adds it to the cache. The $.when/.then doesn't care about any of this; all you need to be concerned about is using the response, which is passed to the .then() handler in both cases. jQuery.when() handles...
What does “The APR based Apache Tomcat Native library was not found” mean?
...ided in the Java Runtime (such as sendfile, epoll, OpenSSL, system status, etc.). Tomcat will run just fine without it, but for some use cases, it will be faster with the native libraries.
If you really want it, download the tcnative-1.dll (or libtcnative.so for Linux) and put it in the bin folder,...
How does autowiring work in Spring?
... to that context. Web applications have a Servlet, JSF uses a el-resolver, etc. Also, there is a place where the application context is bootstrapped and all beans - autowired. In web applications this can be a startup listener.
Autowiring happens by placing an instance of one bean into the desired ...
What is the use of hashCode in Java?
...ed for bucketing in Hash implementations like HashMap, HashTable, HashSet, etc.
The value received from hashCode() is used as the bucket number for storing elements of the set/map. This bucket number is the address of the element inside the set/map.
When you do contains() it will take the hash cod...
Difference between map, applymap and apply methods in Pandas
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fastpaths when called with certain NumPy functions such as mean,
sum, etc.
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How does PHP 'foreach' actually work?
...ointer backup+restore mechanism is that changes to the IAP through reset() etc. usually do not impact foreach. For example, the following code executes as if the reset() were not present at all:
$array = [1, 2, 3, 4, 5];
foreach ($array as &$value) {
var_dump($value);
reset($array);
}
/...
JavaScript: How to find out if the user browser is Chrome?
...t this, here's the code I used which excluded Edge, Maxthon, iOS safari ...etc var is_chrome = ((navigator.userAgent.toLowerCase().indexOf('chrome') > -1) &&(navigator.vendor.toLowerCase().indexOf("google") > -1));
– Alex C.
Mar 1 '16 at 16:09
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