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background:none vs background:transparent what is the difference?
...peat
background-attachment
background-position
That's mean, you can group all styles in one, like:
background: red url(../img.jpg) 0 0 no-repeat fixed;
This would be (in this example):
background-color: red;
background-image: url(../img.jpg);
background-repeat: no-repeat;
background-attachment: fi...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...
Do you really need to use "ALTER TABLE <table_name> MODIFY <column_name> ...". According to dev.mysql.com/doc/refman/5.5/en/alter-table.html it seems "ALTER TABLE <table_name> CONVERT TO CHARACTER SET ..." also chan...
Aspect Oriented Programming vs. Object-Oriented Programming
...ics need to be updated on screen. Assume to repaint the graphics you must call "Display.update()". The classical approach is to solve this by adding more code. At the end of each set method you write
void set...(...) {
:
:
Display.update();
}
If you have 3 set-methods, that is not a pro...
“while :” vs. “while true” [duplicate]
...es nothing, but returns 0 (success). Thus, it's shorter (and faster) than calling an actual command to do the same thing.
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RandomForestClassifier vs ExtraTreesClassifier in scikit learn
...esampling.
In practice, RFs are often more compact than ETs. ETs are generally cheaper to train from a computational point of view but can grow much bigger. ETs can sometime generalize better than RFs but it's hard to guess when it's the case without trying both first (and tuning n_estimators, max_...
setNeedsLayout vs. setNeedsUpdateConstraints and layoutIfNeeded vs updateConstraintsIfNeeded
I know that the auto layout chain consists in basically 3 different process.
2 Answers
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Relative imports in Python 2.7
... not determine what package Python thinks it is in. That depends, additionally, on how you load the file into Python (by running or by importing).
There are two ways to load a Python file: as the top-level script, or as a
module. A file is loaded as the top-level script if you execute it directl...
Orchestration vs. Choreography
...ponsible for invoking and combining the services.
The relationship between all the participating services are described by a single endpoint (i.e., the composite service). The orchestration includes the management of transactions between individual services. Orchestration employs a centralized appr...
Lambda expression vs method reference [closed]
...ded this feature to the language, when clearly we didn't strictly need to (all methods refs can be expressed as lambdas.)
Note that there is no right answer. Anyone who says "always use a method ref instead of a lambda" or "always use a lambda instead of a method ref" should be ignored.
This qu...
NSOperation vs Grand Central Dispatch
...ed first, but as of 10.5 and iOS 2, NSOperationQueue and friends are internally implemented using GCD.
In general, you should use the highest level of abstraction that suits your needs. This means that you should usually use NSOperationQueue instead of GCD, unless you need to do something that NSOp...