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Capture screenshot of active window?
...e active window and take a screenshot of this active window. Does anyone know how I can do this?
11 Answers
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HTML5 form required attribute. Set custom validation message?
...field empty it shows the message, then enter something in the field but it now shows an empty message and the action isn't executed. If you now click the button again, it will go through.
– thomasvdb
Sep 6 '12 at 11:36
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SQL query return data from multiple tables
I would like to know the following:
6 Answers
6
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What does -1 mean in numpy reshape?
...haped into a vector using reshape function with parameter -1. But I don't know what -1 means here.
9 Answers
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Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
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I hear Matlab has lazy evaluation now. If not, we do have the technology to implement them.
– Dmitry
Dec 11 '16 at 21:57
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Basic example of using .ajax() with JSONP?
...lly a simply trick to overcome XMLHttpRequest same domain policy. (As you know one cannot send AJAX (XMLHttpRequest) request to a different domain.)
So - instead of using XMLHttpRequest we have to use script HTMLl tags, the ones you usually use to load JS files, in order for JS to get data from ano...
setState vs replaceState in React.js
... that this.state is {foo: 42}
this.setState({bar: 117})
// this.state is now {foo: 42, bar: 117}
this.setState({foo: 43})
// this.state is now {foo: 43, bar: 117}
this.replaceState({baz: "hello"})
// this.state. is now {baz: "hello"}
Take note of this from the docs, though:
setState() d...
Creating the Singleton design pattern in PHP5
...ngleton would produce an 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.
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Why won't my PHP app send a 404 error?
...along whatever PHP gave me
In addition to providing a 404 header, PHP is now responsible for outputting the actual 404 page.
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How to delete duplicates on a MySQL table?
...y SELECT * FROM table GROUP BY title, SID; It all depends on how well you know what you are doing.
– Kamil Szot
Aug 24 '15 at 10:22
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