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What is the optimal length for an email address in a database?
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I know this is an old thread and there's no problem using 320, but the actual maximum is 254 because of an overriding restriction from RFC2821 that imposes additional constraints over and above those quoted for the local and domain parts. If storage...
Is Redis just a cache?
I have been reading some Redis docs and trying the tutorial at http://try.redis-db.com/ . So far, I can't see any difference between Redis and caching technologies like Velocity or the Enterprise Library Caching Framework
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What's an Aggregate Root?
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@Ahmad, other aggregates might refer to LineItems as read-only data, they just can't change them. If other aggregates could change them, you couldn't protect the order's invariants (nor the line items').
– Jeff Sternal
Mar 8 '10 at 19:57
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@RequestParam in Spring MVC handling optional parameters
...d because logout wasn't a mandatory parameter thanks to required = false already given for logout.
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Android: how to handle button click
...Files). It also makes for easier debugging. It is actually a lot easier to read this way and think about Android imo.
Question 2:
I believe the two mainly used are #2 and #3. I will use a Button clickButton as an example.
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is in the form of an anonymous class.
Button clickButton = (Button) findView...
What is a WeakHashMap and when to use it? [duplicate]
...l java reference). There are also weak references which tend not to be as readily collected as soft references (which don't tend to hang about for long after the last strong reference disappears)
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What is the pythonic way to avoid default parameters that are empty lists?
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Existing answers have already provided the direct solutions as asked for. However, since this is a very common pitfall for new Python programmers, it worth to add the explanation why python behaves this way, which is nicely summarized in "the Hitchh...
Akka Kill vs. Stop vs. Poison Pill?
Newbie question of Akka - I'm reading over Akka Essentials, could someone please explain the difference between Akka Stop/Poison Pill vs. Kill ? The book offers just a small explaination "Kill is synchronous vs. Poison pill is asynchronous." But in what way? Does the calling actor thread lock during...
Overwrite or override
...ommon used word is Override and it's not language-specific as you can also read from wikipedia: http://en.wikipedia.org/wiki/Method_overriding
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Creating .pem file for APNS?
...u first need to enter the passphrase for the .p12 file so that openssl can read it. Then you need to enter a new passphrase that will be used to encrypt the PEM file. Again for this tutorial I used “pushchat” as the PEM passphrase. You should choose something more secure.
Note: if you don’t en...