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How to check for valid email address? [duplicate]
...l begrudgingly forgive people that don't allow email addresses like 100%." foo b@r"(this is a cool email address!)@(just a tld)com(ok), but I think the check for an @ symbol is really all you should have (a top level domain is valid as the domain part, but it's improbable).
– C...
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
...
Get string character by index - Java
... can use to give me the character at the nth position? So in the string "foo", if I asked for the character with index 0 it would return "f".
...
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.
...
How to prettyprint a JSON file?
...ent by:
>>> import json
>>>
>>> your_json = '["foo", {"bar":["baz", null, 1.0, 2]}]'
>>> parsed = json.loads(your_json)
>>> print(json.dumps(parsed, indent=4, sort_keys=True))
[
"foo",
{
"bar": [
"baz",
null,
...
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 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...
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' };
...
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...
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
...