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Checking if a key exists in a JavaScript object?
...r, if you want to particularly test for properties of the object instance (and not inherited properties), use hasOwnProperty:
obj.hasOwnProperty("key") // true
For performance comparison between the methods that are in, hasOwnProperty and key is undefined, see this benchmark
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Implementing comparison operators via 'tuple' and 'tie', a good idea?
(Note: tuple and tie can be taken from Boost or C++11.)
When writing small structs with only two elements, I sometimes tend to choose a std::pair , as all important stuff is already done for that datatype, like operator< for strict-weak-ordering.
The downsides though are the pretty much us...
Learning about LINQ [closed]
... lot about on this site is LINQ . The questions I've asked have been wide and varied and often don't have much context behind them. So in an attempt to consolidate the knowledge I've acquired on Linq I'm posting this question with a view to maintaining and updating it with additional information as...
Styling HTML email for Gmail
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We tried it in Litmus, and it ignores the non-inline stylings. Have you tried <style> for gmail after they announced it ? did it work ?
– Arian
Oct 5 '16 at 18:36
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Loading Backbone and Underscore using RequireJS
I'm trying to load Backbone and Underscore (as well as jQuery) with RequireJS. With the latest versions of Backbone and Underscore, it seems kind of tricky. For one, Underscore automatically registers itself as a module, but Backbone assumes Underscore is available globally. I should also note that ...
HTML 5 Favicon - Support?
... link only answers so I thought I would summarize the links into an answer and what I will be using.
When working to create Cross Browser Favicons (including touch icons) there are several things to consider.
The first (of course) is Internet Explorer. IE does not support PNG favicons until versi...
How does node.bcrypt.js compare hashed and plaintext passwords without the salt?
...(as plaintext). The compare function simply pulls the salt out of the hash and then uses it to hash the password and perform the comparison.
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How to correctly implement custom iterators and const_iterators?
I have a custom container class for which I'd like to write the iterator and const_iterator classes.
6 Answers
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How do I put a bunch of uncommitted changes aside while working on something else
If I have a bunch of uncommitted changes and want to set it aside while working on something else instead, and then later (f.i. after several days) come back to it and proceed working. What would be the easiest workflow to accomplish this? (So far I have only experience with Mercurial's basic functi...
Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?
I've had severe trouble getting LayoutInflater to work as expected, and so did other people: How to use layoutinflator to add views at runtime? .
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