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What does the [Flags] Enum Attribute mean in C#?
... You cannot use the None enumerated constant in a bitwise AND operation to test for a flag because the result is always zero. However, you can perform a logical, not a bitwise, comparison between the numeric value and the None enumerated constant to determine whether any bits in the numeric value ar...
How to refresh Android listview?
...ntation on notifyDataSetChanged(). To much in android is left to black box testing.
– Anderson
Apr 13 '14 at 11:44
...
What's the difference between .so, .la and .a library files?
....
Static pro: The user always uses the version of the library that you've tested with your application, so there shouldn't be any surprising compatibility problems.
Static con: If a problem is fixed in a library, you need to redistribute your application to take advantage of it. However, unless it...
Rails check if yield :area is defined in content_for
...stance_variable_defined?(content_var_name) is a bit neater than instead of testing whether it is nil. Second bigger point, the content_for instance variable is deprecated so your solution is not future proof
– Dave Nolan
Jan 23 '09 at 22:51
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Why are there two build.gradle files in an Android Studio project?
...est properties such as applicationId, minSdkVersion, targetSdkVersion, and test information
buildTypes
build properties such as debuggable, ProGuard enabling, debug signing, version name suffix and testinformation
dependencies
you can read the official docs here:
Projects and...
Seedable JavaScript random number generator
...
If you want to use a better RNG, try the Mersenne Twister. It is a well tested and fairly robust RNG with a huge orbit and excellent performance.
EDIT: I really should be correct and refer to this as a Pseudo Random Number Generator or PRNG.
"Anyone who uses arithmetic methods to produce ran...
Why JSF calls getters multiple times
...fault:
gmapsAutoComplete = false;
break;
}
}
Test results: PageNavigationController.getGmapsAutoComplete() is no longer a HOT SPOT in Java Visual VM (doesn't even show up anymore)
Sharing this topic, since many of the expert users have advised junior JSF developers to ...
Get the first item from an iterable that matches a condition
...
As a reusable, documented and tested function
def first(iterable, condition = lambda x: True):
"""
Returns the first item in the `iterable` that
satisfies the `condition`.
If the condition is not given, returns the first item of
the ...
How to set environment variables in Python?
... python script is running, calling os.environ again will not reflect the latest values.
Excerpt from the docs:
This mapping is captured the first time the os module is imported,
typically during Python startup as part of processing site.py. Changes
to the environment made after this time ar...
What is the exact difference between currentTarget property and target property in javascript
...ck on:
1 click me
instead, the result is:
target: 1
currentTarget: 1
Tested on Chromium 71.
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