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MySQL load NULL values from CSV data
...ual field value to NULL, if the local variable ends up containing an empty string:
LOAD DATA INFILE '/tmp/testdata.txt'
INTO TABLE moo
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
(one, two, three, @vfour, five)
SET four = NULLIF(@vfour,'')
;
If they're all possibly empty, then you'd read th...
Android: how to make an activity return results to the activity which calls it?
...u can make use of setData() to return result.
Intent data = new Intent();
String text = "Result to be returned...."
//---set the data to pass back---
data.setData(Uri.parse(text));
setResult(RESULT_OK, data);
//---close the activity---
finish();
So then again in the first activity you write the b...
Javascript dynamically invoke object method from string
Can I dynamically call an object method having the method name as a string? I would imagine it like this:
5 Answers
...
Android get free size of internal/external memory
... android.os.Environment.MEDIA_MOUNTED);
}
public static String getAvailableInternalMemorySize() {
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSizeLong();
long availableBlocks = ...
Using PowerShell to write a file in UTF-8 without the BOM
...Encoding class and passing $False to the constructor seems to work:
$MyRawString = Get-Content -Raw $MyPath
$Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False
[System.IO.File]::WriteAllLines($MyPath, $MyRawString, $Utf8NoBomEncoding)
...
python list in sql query as parameter
...
Answers so far have been templating the values into a plain SQL string. That's absolutely fine for integers, but if we wanted to do it for strings we get the escaping issue.
Here's a variant using a parameterised query that would work for both:
placeholder= '?' # For SQLite. See DBAPI p...
How to have stored properties in Swift, the same way I had on Objective-C?
...
@VyachaslavGerchicov [String]? is a struct, this is the same case as for Int, Bool. You could use NSArray to keep a collection of NSString instances.
– Wojciech Nagrodzki
Feb 14 '19 at 9:17
...
Command to escape a string in bash
I need a bash command that will convert a string to something that is escaped. Here's an example:
3 Answers
...
How to get current working directory in Java?
... .class file is in.
public class Test
{
public static void main(final String[] args)
{
final String dir = System.getProperty("user.dir");
System.out.println("current dir = " + dir);
}
}
if you are in /User/me/ and your .jar file containing the above code is in /opt/s...
How to avoid having class data shared among instances?
... But why does this happens only for list? When i declared an integer or string outside the init, it was not shared among the objects? Can anyone share any doc link to this concept?
– Amal Ts
May 20 '15 at 6:03
...