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What is Lazy Loading?
...tion is probably doing a lot of eager loading... loading things from disk, and doing calculations and whatnot long before it is ever needed.
Compare this to lazy loading, the application would start much faster, but then the first time you need to do something that requires some long running load, ...
Hidden features of Ruby
...actually wrote an gem at one point to do this, but my code was (a) a mess, and (b) slow. I'm very glad that the functionality has made it into core.
– James A. Rosen
Dec 14 '09 at 13:47
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Overriding superclass property with different type in Swift
...properties. Instead you can create an extra variable in the subclass that handles the new class type:
class Chassis {}
class RacingChassis : Chassis {}
class Car {
var chassis = Chassis()
}
class RaceCar: Car {
var racingChassis = RacingChassis()
override var chassis: Chassis {
...
Is there a list of screen resolutions for all Android based phones and tablets? [closed]
If not, is there a list of screen resolutions for the most popular Android phones and tablets.
7 Answers
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how to get the cookies from a php curl into a variable
...at this is the right answer. I think its ridiculous that curl can't just hand me a mapped array though.
– thirsty93
May 22 '09 at 15:26
3
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Access an arbitrary element in a dictionary in Python
...
On Python 3, non-destructively and iteratively:
next(iter(mydict.values()))
On Python 2, non-destructively and iteratively:
mydict.itervalues().next()
If you want it to work in both Python 2 and 3, you can use the six package:
six.next(six.itervalue...
How to declare a variable in MySQL?
... refer to a variable that has not been
initialized, it has a value of NULL and a type of string.
SELECT @var_any_var_name
You can initialize a variable using SET or SELECT statement:
SET @start = 1, @finish = 10;
or
SELECT @start := 1, @finish := 10;
SELECT * FROM places WHERE place BET...
How to list the properties of a JavaScript object?
...call .keys() on any object. Extending the prototype has some side effects and I wouldn't recommend doing it.
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Dump a mysql database to a plaintext (CSV) backup from the command line
... mysqldump, I'm all ears. Also, I'd like something I can run from the command line (linux). If that's a mysql script, pointers to how to make such a thing would be helpful.
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How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...eypass keypassword \
-destkeystore my-keystore.jks \
-srckeystore cert-and-key.p12 \
-srcstoretype PKCS12 \
-srcstorepass p12password \
-alias 1
Or just use more user-friendly KeyMan from IBM for keystore handling instead of keytool.
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