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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
...h this solution is that if the table already contains rows then you get an error: SQL Error [23502]: ERROR: column "id" contains null values
– isapir
Mar 7 '18 at 16:30
3
...
How to embed a text file in a .NET assembly?
... This is a much better approach because it will throw a compiler error if the resource is removed. It also eliminates typos. Thanks for the post.
– Ben Gripka
Dec 14 '12 at 2:58
...
Multi-Line Comments in Ruby?
...begin and =end must be at the beginning of the line or
it will be a syntax error.
=end
puts "Hello world!"
<<-DOC
Also, you could create a docstring.
which...
DOC
puts "Hello world!"
"..is kinda ugly and creates
a String instance, but I know one guy
with a Smalltalk background, who
does th...
CKEditor automatically strips classes from div
...
There is a syntax error you had above. Specifically style attributes must be set with curly braches {} instead of parens ()
– kamelkev
Jul 17 '13 at 3:11
...
How to define optional methods in Swift protocol?
...st leave empty */
}
}
struct MyStruct: MyProtocol {
/* no compile error */
}
Advantages
No Objective-C runtime is involved (well, no explicitly at least). This means you can conform structs, enums and non-NSObject classes to it. Also, this means you can take advantage of powerful generi...
Simple insecure two-way data “obfuscation”?
I'm looking for very simple obfuscation (like encrypt and decrypt but not necessarily secure) functionality for some data. It's not mission critical. I need something to keep honest people honest, but something a little stronger than ROT13 or Base64 .
...
Staging Deleted files
... git rm doesn't stage already removed files. It throws this error: fatal: pathspec '~.SLDASM' did not match any files. Here are screens with proof: i.imgur.com/cKNKGGe.png i.imgur.com/1p9JdWF.png . First screenshot clearly shows that 2 files are deleted and not staged, second screensh...
Singleton: How should it be used
...t; "hello world\n";
Of course not. We don't need protection against this error, because that kind of error just doesn't happen. If it does, the correct response is to go home and sleep for 12-20 hours and hope you feel better.
If only one object is needed, simply create one instance. If one objec...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...rameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the parameters object, returning only the permitted keys and values. When creating a new Acti...
Size-limited queue that holds last N elements in Java
...like this (I'm typing directly into this window, so buyer beware of syntax errors):
public LimitedSizeQueue implements Queue
{
private int maxSize;
private LinkedList storageArea;
public LimitedSizeQueue(final int maxSize)
{
this.maxSize = maxSize;
storageArea = new LinkedList();
...