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How to check if a specific key is present in a hash or not?
... edited Jun 12 '17 at 19:44
Andre Figueiredo
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answered Aug 21 '13 at 13:09
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How to bring back “Browser mode” in IE11?
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[UPDATE]
The original question, and the answer below applied specifically to the IE11 preview releases.
The final release version of IE11 does in fact provide the ability to switch browser modes from the Emulation tab in the dev tools:
Having said that,...
Fastest way to extract frames using ffmpeg?
...about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fps=fps=...
Tri-state Check box in HTML?
...he HTML markup, it can only be done via Javascript (see this JSfiddle test and this detailed article in CSS tricks)
This state doesn't change the value of the checkbox, it is only a visual cue that masks the input's real state.
Browser test: Worked for me in Chrome 22, Firefox 15, Opera 12 and back ...
How to change language of app when user selects language?
I want my app to support three languages Spanish,Portuguese & English. And give option to select language in app.I have made
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Force drop mysql bypassing foreign key constraint
I'm trying to delete all tables from a database except one, and I end up having the following error:
6 Answers
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Best way to make Java's modulus behave like it should with negative numbers?
... of the negative values of a, since (a % b) is a negative value between -b and 0, (a % b + b) is necessarily lower than b and positive. The last modulo is there in case a was positive to begin with, since if a is positive (a % b + b) would become larger than b. Therefore, (a % b + b) % b turns it in...
What is the Swift equivalent of -[NSObject description]?
...is on a Swift type you must implement the CustomStringConvertible protocol and then also implement a string property called description.
For example:
class MyClass: CustomStringConvertible {
let foo = 42
var description: String {
return "<\(type(of: self)): foo = \(foo)>"
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Retrieving Property name from lambda expression
...r 23 '09 at 4:14
Cameron MacFarlandCameron MacFarland
63.2k1919 gold badges9898 silver badges128128 bronze badges
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HTML5 Video Dimensions
... in Chrome on this demo: people.opera.com/howcome/2007/video/controls.html and it works...
– Šime Vidas
Nov 9 '10 at 0:40
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