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Polymorphism in C++
...types.
"to" parametric types from values of constant type
They do not establish polymorphic contexts by themselves, but do help empower/simplify code inside such contexts.
You may feel cheated... it doesn't seem like much. The significance is that in parametric polymorphic contexts (i.e. inside...
How to get distinct values for non-key column fields in Laravel?
...should use groupby. In Query Builder you can do it this way:
$users = DB::table('users')
->select('id','name', 'email')
->groupBy('name')
->get();
share
|
...
MySQL Data - Best way to implement paging?
...a. Check codular.com/implementing-pagination for mutiple ways whicg are suitable for specific scenerio.
– Amit
Oct 12 '17 at 14:32
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show 9 ...
Difference between modes a, a+, w, w+, and r+ in built-in open function?
...hat I can now remember! The flow chart in this answer is beautiful and the table in the answer below is great, but if these answers (and others elsewhere) began with this simple point and worked from there, it would help provide a much better mental framework to hang the details on. So thanks. (I'm ...
Undo scaffolding in Rails
...e db:rollback before you destroy your scaffold. This will destroy/drop the table if there is no other migration except the scaffold's migration before it.
– Yakob Ubaidi
May 8 '14 at 11:06
...
Microsoft CDN for jQuery or Google CDN? [closed]
... @DaveWard, can you verify this is still the case, or have the tables turned somewhat over the last few years?
– snumpy
Apr 26 '13 at 16:41
3
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What should every developer know about databases? [closed]
...r a nontrivial requirement is not a trivial task. You can't build good SQL tables if you misunderstand the relational model.
Physical data modeling is generally DBMS specific, and doesn't need to be learned in much detail, unless the developer is also the database builder or the DBA. What develope...
Make body have 100% of the browser height
...the best solution:
html {
width: 100%;
height: 100%;
display: table;
}
body {
width: 100%;
display: table-cell;
}
html, body {
margin: 0px;
padding: 0px;
}
It is dynamic in that the html and the body elements will expand automatically if their contents overflow. I t...
Convert int to char in java
...nt out the char with ascii value 1 (start-of-heading char, which isn't printable).
int a = '1';
char b = (char) a;
System.out.println(b);
will print out the char with ascii value 49 (one corresponding to '1')
If you want to convert a digit (0-9), you can add 48 to it and cast, or something like ...
How to get default gateway in Mac OSX
...sy to find the required field. The sample result is as following:
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.195.1 UGSc 17 0 en2
127 127.0.0.1 UCS 0...