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Is it better practice to use String.format over string Concatenation in Java?
...thout requiring a recompile of the executable to account for the different ordering. With argument positions you can also re-use the same argument without passing it into the function twice:
String.format("Hello %1$s, your name is %1$s and the time is %2$t", name, time)
...
Where is the documentation for the values() method of Enum?
...od that returns an
array containing all of the values of the enum in the order they are
declared. This method is commonly used in combination with the
for-each construct to iterate over the values of an enum type.
Enum.valueOf class(The special implicit values method is mentioned in descrip...
PDOException “could not find driver”
... get it working, you will need to restart your web-server:
Apache: sudo /etc/init.d/apache2 restart
Nginx: sudo /etc/init.d/nginx restart
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Why is quicksort better than mergesort?
...t into a BTREE datastructure for the index. (BTREEs are naturally kept in order, so you can load one from a sorted dataset with few seeks to disk.)
There have been a number of occasions where understanding how to avoid disk seeks has let me make data processing jobs take hours rather than days or ...
What is the difference between Swing and AWT?
...stem window and then paints pictures of buttons, labels, text, checkboxes, etc., into that window and responds to all of your mouse-clicks, key entries, etc., deciding for itself what to do instead of letting the operating system handle it. Thus Swing is 100% portable and is the same across platform...
Regex - Should hyphens be escaped? [duplicate]
...er in the range (e.g. [-a-z] or [0-9-]), OR escape it (e.g. [a-z\-0-9]) in order to add "hyphen" to your class.
It's more common to find a hyphen placed first or last within a character class, but by no means will you be lynched by hordes of furious neckbeards for choosing to escape it instead.
(A...
Check if multiple strings exist in another string
... if x in str]
If you want to get all non-duplicate matches (disregarding order):
matches = {x for x in a if x in str}
If you want to get all non-duplicate matches in the right order:
matches = []
for x in a:
if x in str and x not in matches:
matches.append(x)
...
Migration: Cannot add foreign key constraint
...ed as a primary key in it's original table. Migrations get executed in the order they were created as indicated by the file name generated after running migrate:make. E.g. 2014_05_10_165709_create_student_table.php.
The solution was to rename the file with the foreign key to an earlier time than th...
Maintain the aspect ratio of a div with CSS
...s:
.demoWrapper {
padding: 10px;
background: white;
box-sizing: border-box;
resize: horizontal;
border: 1px dashed;
overflow: auto;
max-width: 100%;
height: calc(100vh - 16px);
}
div {
width: 100%;
padding-bottom: 75%;
background: gold; /** <-- For the demo **/
}
<d...
How to add MVC5 to Visual Studio 2013?
...erent ASP.Net features.
You must select .NET Framework 4.5 (or higher) in order to see the ASP.NET Web Application template (For ASP.NET One).
So just select Visual C# > Web > ASP.NET Web Application, then select the MVC checkbox in the next step.
Note: Make sure not to select the C# > We...