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What does PermGen actually stand for?
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@BrianGordon is correct.. For more information about that: stackoverflow.com/a/22509753/4557537
– Fadi
Sep 14 '16 at 13:58
add a c...
Hidden features of mod_rewrite
...hing should be case insensitive
Using the long-form of flags is often more readable and will help others who come to read your code later.
You can separate multiple flags with a comma:
RewriteRule ^olddir(.*)$ /newdir$1 [L,NC]
Common pitfalls
Mixing mod_alias style redirects with mod_rew...
Declaring variables inside a switch statement [duplicate]
...y reused later). If the variable is used againlater, then it really makes more sense to declare it before the start of the switch statement, since its very obtuse otherwise.
– Peter N Lewis
Aug 5 '09 at 5:28
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How do I check if a number evaluates to infinity?
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What's wrong with overridable method calls in constructors?
...ign and document for inheritance, or else prohibit it:
There are a few more restrictions that a class must obey to allow inheritance. Constructors must not invoke overridable methods, directly or indirectly. If you violate this rule, program failure will result. The superclass constructor runs b...
Choosing a stand-alone full-text search server: Sphinx or SOLR? [closed]
... the devs committing to Solr are also Lucene committers.
Sphinx integrates more tightly with RDBMSs, especially MySQL.
Solr can be integrated with Hadoop to build distributed applications
Solr can be integrated with Nutch to quickly build a fully-fledged web search engine with crawler.
Solr can inde...
Looking for a good world map generation algorithm [closed]
...cA Thanks. I'm very tempted to have a go at this myself - when I have some more free time... :-)
– David Johnstone
Apr 16 '10 at 5:06
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MySQL indexes - what are the best practices?
...ks), you need to update the index each and every time. So you do a little more work while you're writing new rows, but you save a ton of time when you're searching for something.
So, in general, indexing creates a tradeoff between read efficiency and write efficiency. With no indexes, inserts can...
What column type/length should I use for storing a Bcrypt hashed password in a Database?
...st case A is treated as equal to a. See The _bin and binary Collations for more information.
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How many GCC optimization levels are there?
...imization level is specified)
-O1 (optimize minimally)
-O2 (optimize more)
-O3 (optimize even more)
-Ofast (optimize very aggressively to the point of breaking standard compliance)
-Og (Optimize debugging experience. -Og enables optimizations that do not interfere with debugging. It sho...