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Regular Expression for alphanumeric and underscores
...r expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter
0-9 : any digit
_ : underscore
] : end of character group
* : zero or more of the given characters
$ : end of s...
SQL exclude a column using SELECT * [except columnA] FROM tableA?
...elect say all data for a student for statistical exploration but not bring down the wire the student id itself to bolster privacy
– George Birbilis
Jul 11 '14 at 16:59
1
...
Do you (really) write exception safe code? [closed]
...ur code should never offer that. This code will leak everything, and break down at the very first exception thrown.
basic: This is the guarantee you must at the very least offer, that is, if an exception is thrown, no resources are leaked, and all objects are still whole
strong: The processing will ...
How to check if UILabel is truncated?
...a minimumFontSize for your label that allows the system to shrink the text down to that size. You may want to use sizeWithFont:minFontSize:actualFontSize:forWidth:lineBreakMode: in that case.
CGSize size = [label.text sizeWithAttributes:@{NSFontAttributeName:label.font}];
if (size.width > label...
Mac SQLite editor [closed]
...app on a device
Open iTunes
Select the device
Select the "Apps" tab
Scroll down to the "File Sharing" section and select the app
The .sqlite file should appear in the right hand pane - select it and "Save to..."
Once it's saved open it up in your favourite SQLITE editor
You can also edit it and co...
How to call a function from a string stored in a variable?
...ly the safest method being call_user_func() or if you must you can also go down the route of $function_name(). It is possible to pass arguments using both of these methods as so
$function_name = 'foobar';
$function_name(arg1, arg2);
call_user_func_array($function_name, array(arg1, arg2));
If th...
How do I quickly rename a MySQL database (change schema name)?
...
Three options:
Create the new database, bring down the server, move the files from one database folder to the other, and restart the server. Note that this will only work if ALL of your tables are MyISAM.
Create the new database, use CREATE TABLE ... LIKE statements, and...
Objective-C: Reading a file line by line
...aractersInSet:
[NSCharacterSet newlineCharacterSet]];
// then break down even further
NSString* strsInOneLine =
[allLinedStrings objectAtIndex:0];
// choose whatever input identity you have decided. in this case ;
NSArray* singleStrs =
[currentPointString componentsSeparatedBy...
Why is nginx responding to any domain name?
...
I have no idea why this answer is so far down the list. This is the one that answers the question without getting distracted by shiny things along the way.
– mmc
Nov 20 '18 at 18:06
...
Real-world examples of recursion [closed]
...voc when ever type B infects a multitude of type A.
Your task is to track down all the type Bs and immunise them to stop the backbone of the disease. Unfortunately tho, you cant administer a nationwide cure to all, because the people who are typeAs are also deadly allergic to the cure that works f...