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How to set auto increment primary key in PostgreSQL?
I have a table in PostgreSQL with 22 columns, and I want to add an auto increment primary key.
7 Answers
...
Creating the Singleton design pattern in PHP5
...n instance of its parent class instead of its own.
Now you can do:
class Foobar extends Singleton {};
$foo = Foobar::getInstance();
And $foo will be an instance of Foobar instead of an instance of Singleton.
share
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Error-Handling in Swift-Language
...ing I noticed is that there are no exceptions.
So how do they do error handling in Swift? Has anyone found anything related to error-handling?
...
Define preprocessor macro through CMake?
...t, you can do the following:
target_compile_definitions(my_target PRIVATE FOO=1 BAR=1)
You should do this if you have more than one target that you're building and you don't want them all to use the same flags. Also see the official documentation on target_compile_definitions.
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Function overloading in Javascript - Best practices
...last argument to their methods. This object can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test']) { } //if test param exists, do something..
}
foo(1, 2, {"method":"add"});
foo(3, 4, {"test":"equals", "bar":"tree"});
Then you can handle it anyway you want in your method. ...
How can I clear scrollback buffer in Tmux?
FYI, I am using Tmux through the Mac OS X Terminal app.
13 Answers
13
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How to specify test directory for mocha?
...ource that they test, but call the test files *.spec.js. For example: src/foo/foo.js is tested by src/foo/foo.spec.js.
To run all the tests named *.spec.js by convention:
"scripts": {
"test": "mocha **/*.spec.js"
},
Then to run all the tests call:
npm test
See the pattern here? Good...
How do you 'redo' changes after 'undo' with Emacs?
... Suppose you do have an operation sequence that looks like this:
Insert "foo"
Insert "bar"
Insert "I love spam"
Now, you undo. It undoes the last action, resulting in the following list:
Insert "foo"
Insert "bar"
If you do something other than undo at this point - say, C-f, the operation st...
Iterate through object properties
...fail if the object has an unrelated field with the same name:
var obj = { foo: 42, hasOwnProperty: 'lol' };
obj.hasOwnProperty('foo'); // TypeError: hasOwnProperty is not a function
That's why it's safer to call it through Object.prototype instead:
var obj = { foo: 42, hasOwnProperty: 'lol' };
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Set type for function parameters?
... Eclipse JavaScript Editor - Outline View and Code Completion. whereas the foo( /*MyType*/ param ) way as described here also works: stackoverflow.com/a/31420719/1915920
– Andreas Dietrich
Feb 17 '16 at 8:37
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