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Traits vs. interfaces
...If you're still interested in traits and their relationship to interfaces, read on ...
Let's start by saying this:
Object-Oriented Programming (OOP) can be a difficult paradigm to grasp.
Just because you're using classes doesn't mean your code is
Object-Oriented (OO).
To write OO code y...
Swift - How to convert String to Double
...ishUKLocale
let englishUKCurrency = formatter.number(from: "£9,999.99")
Read more on my blog post about converting String to Double types (and currency).
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What are the best Haskell libraries to operationalize a program? [closed]
... 100.0% of total user, 0.0% of total elapsed
You can get this in machine-readable format too:
$ ./A +RTS -t --machine-readable
[("bytes allocated", "64952")
,("num_GCs", "1")
,("average_bytes_used", "43784")
,("max_bytes_used", "43784")
,("num_byte_usage_samples", "1")
,("peak_megabytes_al...
Reverting a single file to a previous version in git [duplicate]
...Say I modified a file 5 times and I want to go back to change 2, after I already committed and pushed to a repository.
5 An...
psycopg2: insert multiple rows with one query
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Just confirmed this improvement myself. From what I've read psycopg2's executemany doesn't do anything optimal, just loops and does many execute statements. Using this method, a 700 row insert to a remote server went from 60s to <2s.
– Nelson
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++someVariable vs. someVariable++ in JavaScript
...e are slight performance benefits to using ++x where possible, because you read the variable, modify it, then evaluate and store it. Versus the x++ operator where you read the value, evaluate it, modify it, then store it.
sh...
How to directly initialize a HashMap (in a literal way)?
...(it creates a new class that inherits from HashMap). Therefore, you should read more here:
http://www.c2.com/cgi/wiki?DoubleBraceInitialization
, or simply use Guava:
Map<String, Integer> left = ImmutableMap.of("a", 1, "b", 2, "c", 3);
...
How can I echo HTML in PHP?
... run.
If you have any more questions feel free to leave a comment.
Further reading is available on these things in the PHP documentation.
NOTE: PHP short tags <? and ?> are discouraged because they are only available if enabled with short_open_tag php.ini configuration file directive, or if P...
std::string length() and size() member functions
I was reading the answers for this question and found that there is actually a method called length() for std::string (I always used size() ). Is there any specific reason for having this method in std::string class? I read both MSDN and CppRefernce, and they seem to indicate that there is ...
Relative paths in Python
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It's 2018 now, and Python have already evolve to the __future__ long time ago. So how about using the amazing pathlib coming with Python 3.4 to accomplish the task instead of struggling with os, os.path, glob, shutil, etc.
So we have 3 paths here (possibly ...