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Truly understanding the difference between procedural and functional
...e real difference between functional and imperative programming is the mindset - imperative programmers are thinking of variables and blocks of memory, whereas functional programmers are thinking, "How can I transform my input data into my output data" - your "program" is the pipeline and set of tra...
指定组件的大小 · App Inventor 2 中文网
...reen component behaves like a VerticalArrangement whose Height property is set to Automatic. When the Scrollable property is not checked, the Screen component behaves like a VerticalArrangement whose Height property is specified in pixels.
VerticalArrangement
In a VerticalArr...
Reasons for using the set.seed function
Many times I have seen the set.seed function in R, before starting the program. I know it's basically used for the random number generation. Is there any specific need to set this?
...
postgres default timezone
.... So, you can change the timezone for the current session.
See the doc.
set timezone TO 'GMT';
Or, more closely following the SQL standard, use the SET TIME ZONE command. Notice two words for "TIME ZONE" where the code above uses a single word "timezone".
SET TIME ZONE 'UTC';
The doc expla...
How to check if Location Services are enabled?
...nabled) {
// notify user
new AlertDialog.Builder(context)
.setMessage(R.string.gps_network_not_enabled)
.setPositiveButton(R.string.open_location_settings, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialo...
How to convert Set to String[]?
I need to get a String[] out of a Set<String> , but I don't know how to do it. The following fails:
7 Answers
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How to remove leading and trailing whitespace in a MySQL field?
...
You're looking for TRIM.
UPDATE FOO set FIELD2 = TRIM(FIELD2);
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Should MySQL have its timezone set to UTC?
...ttps://serverfault.com/questions/191331/should-servers-have-their-timezone-set-to-gmt-utc
4 Answers
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How can I set the PHP version in PHPStorm?
Is it possible to set the PHP version value, say 4.0+ and have PHPStorm highlight functions that wouldn't work with the oldest version? For example, for PHP4 this should highlight static function etc. I have a PHP installation on my PC but I don't want to install an older PHP version for every sma...
Making a property deserialize but not serialize with json.net
...asses currently defined like this:
class Config
{
public Fizz ObsoleteSetting { get; set; }
public Bang ReplacementSetting { get; set; }
}
enum Fizz { Alpha, Beta, Gamma }
class Bang
{
public string Value { get; set; }
}
And you want to do this:
string json = @"{ ""ObsoleteSetting"...