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What is the difference between atan and atan2 in C++?
...ng the arctangent of all four quadrants. std::atan only allows calculating from quadrants 1 and 4.
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Why there is no ConcurrentHashSet against ConcurrentHashMap
...no built in type for ConcurrentHashSet because you can always derive a set from a map. Since there are many types of maps, you use a method to produce a set from a given map (or map class).
Prior to Java 8, you produce a concurrent hash set backed by a concurrent hash map, by using Collections.newS...
Return from lambda forEach() in java
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The return there is returning from the lambda expression rather than from the containing method. Instead of forEach you need to filter the stream:
players.stream().filter(player -> player.getName().contains(name))
.findFirst().orElse(null);
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Is there a better way to iterate over two lists, getting one element from each list for each iterati
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in case your Latitude and Longitude lists are large and lazily loaded:
from itertools import izip
for lat, lon in izip(latitudes, longitudes):
process(lat, lon)
or if you want to avoid the for-loop
from itertools import izip, imap
out = imap(process, izip(latitudes, longitudes))
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How can I strip first and last double quotes?
I want to strip double quotes from:
13 Answers
13
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New Array from Index Range Swift
How can I do something like this? Take the first n elements from an array:
5 Answers
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Exception thrown in catch and finally clause
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The catch is executed since q() threw an Exception from its own finally block.
– Péter Török
Sep 23 '10 at 14:26
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AWK: Access captured group from line pattern
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Apparently someone disagrees. This web page is from 2005 : tek-tips.com/faqs.cfm?fid=5674 It confirms that you cannot reuse matched groups in awk.
– Peter Tillemans
Jun 2 '10 at 13:00
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How serious is this new ASP.NET security vulnerability and how can I workaround it?
...tionally add a random time sleep in the error page to prevent the attacker from timing the responses for added attack information.
In web.config
<configuration>
<location allowOverride="false">
<system.web>
<customErrors mode="On" defaultRedirect="~/error.html" />
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Convert .pem to .crt and .key
...and to extract/convert the certificate .crt and private key .key files from a .pem file? I just read they are interchangable, but not how.
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