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Copying data from one SQLite database to another
... Y using the ATTACH command, then run the appropriate Insert Into commands for the tables you want to transfer.
INSERT INTO X.TABLE SELECT * FROM Y.TABLE;
Or, if the columns are not matched up in order:
INSERT INTO X.TABLE(fieldname1, fieldname2) SELECT fieldname1, fieldname2 FROM Y.TABLE;
...
What is the documents directory (NSDocumentDirectory)?
...ans that it can only access files and directories within its own contents. For example Documents and Library.
See the iOS Application Programming Guide.
To access the Documents directory of your applications sandbox, you can use the following:
iOS 8 and newer, this is the recommended method
+ (N...
How do I check if an index exists on a table field in MySQL?
...
Try:
SELECT * FROM information_schema.statistics
WHERE table_schema = [DATABASE NAME]
AND table_name = [TABLE NAME] AND column_name = [COLUMN NAME]
It will tell you if there is an index of any kind on a certain column without the need t...
How can I make a button redirect my page to another page? [duplicate]
...t to the button:
<button onclick="location.href = 'www.yoursite.com';" id="myButton" class="float-left submit-button" >Home</button>
But you shouldn't really have it inline like that, instead, put it in a JS block and give the button an ID:
<button id="myButton" class="float-left ...
Presenting a UIAlertController properly on an iPad using iOS 8
...OS 8.0, Apple introduced UIAlertController to replace UIActionSheet . Unfortunately, Apple didn't add any information on how to present it. I found an entry about it on hayaGeek's blog, however, it doesn't seem to work on iPad. The view is totally misplaced:
...
iFrame src change event detection?
...
Correction: this.contentWindow.location is available for other domains. Even this.contentWindow.location.href is available for other domains, but only for writing. However reading this.contentWindow.location.href is limited to the same domain.
– wadim
...
Easiest way to copy a single file from host to Vagrant guest?
...
Since you ask for the easiest way, I suggest using vagrant-scp. It adds a scp command to vagrant, so you can copy files to your VM like you would normally do with scp.
Install via:
vagrant plugin install vagrant-scp
Use it like so:
va...
Is there a __CLASS__ macro in C++?
...
That's better. As for knowing the class, defining char array sounds better than postponing it till runtime.
– Michael Krelin - hacker
Nov 3 '09 at 12:21
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What is stdClass in PHP?
...ython (Edit: but not actually used as universal base class; thanks @Ciaran for pointing this out).
It is useful for anonymous objects, dynamic properties, etc.
An easy way to consider the StdClass is as an alternative to associative array. See this example below that shows how json_decode() allow...
How do I scale a stubborn SVG embedded with the tag?
...x="0 0 {width} {height}"
Replace {width} and {height} with some defaults for the viewBox. I used the values from the "width" and "height" attributes of the SVG tag and it seemed to work.
Save the SVG and it should now scale as expected.
I found this information here:
https://blueprints.launchpa...