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SQL Joins Vs SQL Subqueries (Performance)?
...explicit JOIN. In my experience IN is a very slow operator, since SQL normally evaluates it as a series of WHERE clauses separated by "OR" (WHERE x=Y OR x=Z OR...).
As with ALL THINGS SQL though, your mileage may vary. The speed will depend a lot on indexes (do you have indexes on both ID column...
SQLAlchemy: Creating vs. Reusing a Session
Just a quick question: SQLAlchemy talks about calling sessionmaker() once but calling the resulting Session() class each time you need to talk to your DB. For me that means the second I would do my first session.add(x) or something similar, I would first do
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Class.forName() vs ClassLoader.loadClass() - which to use for dynamic loading? [duplicate]
When dynamically loading a class, when is it appropriate to use
6 Answers
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htmlentities() vs. htmlspecialchars()
... for htmlentities:
This function is identical to htmlspecialchars() in all ways, except with htmlentities(), all characters which have HTML character entity equivalents are translated into these entities.
From the PHP documentation for htmlspecialchars:
Certain characters have special sig...
Why are function pointers and data pointers incompatible in C/C++?
...ry but C doesn't limit itself to only certain types of architectures if at all possible.
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Is there a JavaScript strcmp()?
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Here are some jsperf results jsperf.com/localecompare-vs-intl-collator jsperf.com/localecompare-vs-intl-collator
– Colin D
Mar 12 at 19:21
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Integer.toString(int i) vs String.valueOf(int i)
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String.valueOf(int) just calls Integer.toString(i) directly. So best to call Integer.toString(int).
– djchapm
May 21 '19 at 16:21
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Choosing a Windows automation scripting language. AutoIt vs Autohotkey [closed]
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Nonetheless AHK does have a intrinsically more arcane syntax, which is not as user- or beginner friendly as AutoIt. AutoIt is more developer friendly for large projects and supports a more modern, intuitive syntax. AHK really shines in what it's named for. Hotke...
ASP.NET MVC on IIS 7.5
..." in Framework64 for 64-bit Windows! that bit me in the *ss. I must've installed the 32 bit verion 4 or 5 times with no effect.
– Ben Lesh
Jan 4 '11 at 15:31
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Transfer-Encoding: gzip vs. Content-Encoding: gzip
... Content-Encoding is a business layer property, which a proxy would not be allowed to change, in addition to other ramifications (ETags etc). According to reality however, TE is not normally used for compression, and many servers/clients don't even support it out of the box, whereas CE is used more ...