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When is SQLiteOpenHelper onCreate() / onUpgrade() run?
...atabase file.
catch is the constructor
SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version)
So when the database helper constructor is called with a name (2nd param), platform checks if the database exists or not and if the database exists, it gets th...
Only variables should be passed by reference
...
I agree. There's no point in using string manipulation to parse file paths when you have appropriate APIs to do so.
– gd1
Jan 7 '14 at 7:43
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How to limit the amount of concurrent async I/O operations?
... client = new HttpClient();
var html = await client.GetStringAsync(url);
}
finally
{
throttler.Release();
}
}));
}
// won't get here until all urls have been put into tasks
...
Java: Get month Integer from Date
...ime datetime = new DateTime(date);
int month = Integer.parseInt(datetime.toString("MM"))
…or…
int month = dateTime.getMonthOfYear();
share
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improve this answer
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fol...
Bash Templating: How to build configuration files from templates with Bash?
...$ENV{$1} ? $ENV{$1} : $&/eg' < template.txt
to replace all ${...} strings with corresponding enviroment variables (do not forget to export them before running this script).
For pure bash this should work (assuming that variables do not contain ${...} strings):
#!/bin/bash
while read -r li...
How do I have an enum bound combobox with custom string formatting for enum values?
In the post Enum ToString , a method is described to use the custom attribute DescriptionAttribute like this:
21 Answers...
How and when to use ‘async’ and ‘await’
...ender, EventArgs e)
{
// Call the method that runs asynchronously.
string result = await WaitAsynchronouslyAsync();
// Call the method that runs synchronously.
//string result = await WaitSynchronously ();
// Display the result.
textBox1.Text += result;
}
// The following ...
How do I format a string using a dictionary in python-3.x?
I am a big fan of using dictionaries to format strings. It helps me read the string format I am using as well as let me take advantage of existing dictionaries. For example:
...
How to return a string value from a Bash function
I'd like to return a string from a Bash function.
18 Answers
18
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How do I toggle an element's class in pure JavaScript?
...e seperators. for example it doesn't work if class name contain dash ("-") char: btn, btn-red will both match'\\b' + 'btn' + '\\b' !!
– S.Serpooshan
Feb 5 '19 at 6:47
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