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Can table columns with a Foreign Key be NULL?
...ue to NULL when INSERTING or UPDATING, you're good to go.
But this is the fun of programming, isn't it? Creating our own problems and then fixing them! Cheers!
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How to convert int to QString?
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123
And if you want to put it into string within some text context, forget about + operator.
Simp...
append multiple values for one key in a dictionary [duplicate]
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python way is to not duplicate functionality
– SilentGhost
Jul 9 '10 at 12:59
2
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What's the u prefix in a Python string?
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That was a fun read! Thanks! Article is 17 years old and it's still accurate. Wow.
– Kerwin Sneijders
Feb 28 at 11:08
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Animated GIF in IE stopping
...ross this workaround, and it actually does work.
Here is the gist of it:
function showProgress() {
var pb = document.getElementById("progressBar");
pb.innerHTML = '<img src="./progress-bar.gif" width="200" height ="40"/>';
pb.style.display = '';
}
and in your html:
<input t...
How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
...thSegments.last()
If they don't give you the right name you should use:
fun Uri.getName(context: Context): String {
val returnCursor = context.contentResolver.query(this, null, null, null, null)
val nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
returnCursor.mov...
Use of alloc init instead of new
...
Very old question, but I've written some example just for fun — maybe you'll find it useful ;)
#import "InitAllocNewTest.h"
@implementation InitAllocNewTest
+(id)alloc{
NSLog(@"Allocating...");
return [super alloc];
}
-(id)init{
NSLog(@"Initializing...");
retur...
Espresso: Thread.sleep( );
...ained with other ViewInteractions:
/**
* Wait for view to be visible
*/
fun ViewInteraction.waitUntilVisible(timeout: Long): ViewInteraction {
val startTime = System.currentTimeMillis()
val endTime = startTime + timeout
do {
try {
check(matches(isDisplayed()))
...
How to copy a collection from one database to another in MongoDB
....
You could do something like:
db.<collection_name>.find().forEach(function(d){ db.getSiblingDB('<new_database>')['<collection_name>'].insert(d); });
Please note that with this, the two databases would need to share the same mongod for this to work.
Besides this, you can do a...
MySQL Query to select data from last week?
...
123
SELECT id FROM tbl
WHERE date >= curdate() - INTERVAL DAYOFWEEK(curdate())+6 DAY
AND date &...