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MySQL Creating tables with Foreign Keys giving errno: 150
...h a value in the Parent table PK column(s). Check this with a query like:
SELECT COUNT(*) FROM Child LEFT OUTER JOIN Parent ON Child.FK = Parent.PK
WHERE Parent.PK IS NULL;
This must return zero (0) unmatched values. Obviously, this query is an generic example; you must substitute your table nam...
Django: How to manage development and production settings?
...ings if necessary (by adding the modifications below that stanza).
I then select which settings files to use by linking it in to settings.py:
ln -s settings.development.py settings.py
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iOS: Access app-info.plist variables in code
...? If you view your info.plist as source code (right click the info.plist - select Open As) then you will get to see all the various key names you can use.
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Check if a string is html or not
...bject|ol|optgroup|output|p|pre|progress|q|rp|rt|ruby|s|samp|script|section|select|small|span|strike|strong|style|sub|summary|sup|table|tbody|td|textarea|tfoot|th|thead|time|title|tr|track|tt|u|ul|var|video).*?<\/\2>/i.test(htmlStringHere)
This does proper validation as it contains ALL HTML ...
Adding Xcode Workspace Schemes to Version Control
...oj". Are you using Xcode 7? Are you using a Workspace? What "Container" is selected for the scheme in the Manage Schemes sheet? More info is needed.
– Joshua Nozzi
Sep 16 '15 at 3:47
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How to duplicate sys.stdout to a log file?
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I selected this answer too soon. It works great for "print", but not so much for external command output.
– drue
Mar 5 '09 at 21:53
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PHP random string generator
...keyspace A string of all possible characters
* to select from
* @return string
*/
function random_str(
int $length = 64,
string $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
): string {
if ($length < 1) {
throw new \Ran...
How to remove specific element from an array using python
... Thanks for pointing out that arrays aren't the same as lists. The selected answer doesn't work on arrays in 2.7.
– EL_DON
Feb 8 '17 at 18:37
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How to declare a friend assembly?
...y={1}",
assemblyName.Name,
string.Join("", assemblyName.GetPublicKey().Select(m => string.Format("{0:x2}", m))));
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Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
... is supported.
Disable Hyper-V
Type 'windows features' into start menu, select 'Turn Windows Features On or Off'.
Unselect all Hyper-V related options, press OK, Reboot.
This will break any Hyper-V VMs you have, including any Windows Phone emulators and anything else you have setup that requires ...