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list.clear() vs list = new ArrayList(); [duplicate]
...olds onto memory, the other one throws out its memory and gets reallocated from scratch (with the default capacity). Which is better depends on whether you want to reduce garbage-collection churn or minimize the current amount of unused memory. Whether the list sticks around long enough to be moved ...
Cast Object to Generic Type for returning
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I know it's from the OP, but really { catch(ClassCastException e) { return null; } is unforgiveable
– artbristol
Jan 25 '13 at 16:38
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When should I use double or single quotes in JavaScript?
... with this one. Sure pick a preferred style, but if you need to break away from the style to save escaping lots of quotes in one string. I'd be OK with that.
– Martin Clarke
May 2 '09 at 8:11
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What does ~~ (“double tilde”) do in Javascript?
...gives:
NOT 4210 = 111111111111111111111111110101012 = -4310
This differs from Math.floor(-43.2) in that negative numbers are rounded toward zero, not away from it. (The floor function, which would equal -44, always rounds down to the next lower integer, regardless of whether the number is positive...
Evaluate empty or null JSTL c tags
...out those ${} things (the Expression Language, which is a separate subject from JSTL), check here.
See also:
How does EL empty operator work in JSF?
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Difference between scaling horizontally and vertically for databases [closed]
...ersion of MySQL). It provides an easy way to scale vertically by switching from small to bigger machines. This process often involves downtime.
In-Memory Data Grids such as GigaSpaces XAP, Coherence etc.. are often optimized for both horizontal and vertical scaling simply because they're not bound t...
Advantages to Using Private Static Methods
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From the FxCop rule page on this:
After you mark the methods as static, the compiler will emit non-virtual call sites to these members. Emitting non-virtual call sites will prevent a check at runtime for each call that en...
Reserved keywords in JavaScript
...t mentioned in neither the ES5 spec nor the ES6 draft. Where did that come from?
– Vladimir Panteleev
Oct 6 '13 at 5:10
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What is Android keystore file, and what is it used for?
...lease updates so keep that cert safe and backed up if need be.
But apart from signing apks to release into the wild, you can use it to authenticate your device to a server over SSL if you so desire, (also Android related) among other functions.
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What is the maximum length of a valid email address?
... says the limit is "256 octets", including separators (a deliberate change from RFC 2821 which said "characters"). I believe the 256-octet limit (minus 2 for 254) is not superseded, and the effective character limit is reduced for addresses with multi-byte UTF-8 characters.
– A...