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Show or hide element in React
... around with React.js for the first time and cannot find a way to show or hide something on a page via click event. I am not loading any other library to the page, so I am looking for some native way using the React library. This is what I have so far. I would like to show the results div when th...
lsof survival guide [closed]
...th -c
lsof -c syslog-ng
The -p switch lets you see what a given process ID has open, which is good for learning more about unknown processes:
lsof -p 10075
The -t option returns just a PID
lsof -t -c Mail
Using the -t and -c options together you can HUP processes
kill -HUP $(lsof -t -c ssh...
What is an xs:NCName type and when should it be used?
...NCNames (not qualified names):
namespace prefixes
values representing an ID
values representing an IDREF
values representing a NOTATION
processing instruction targets
entity names
share
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improve...
Understanding :source option of has_one/has_many through of Rails
...s_to :user
end
With this code, you can do something like Newsletter.find(id).users to get a list of the newsletter's subscribers. But if you want to be clearer and be able to type Newsletter.find(id).subscribers instead, you must change the Newsletter class to this:
class Newsletter
has_many :s...
Transparent ARGB hex value
...doing alpha*255 then round then to hex. Here's a quick converter http://jsfiddle.net/8ajxdLap/4/
function rgb2hex(rgb) {
var rgbm = rgb.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?((?:[0-9]*[.])?[0-9]+)[\s+]?\)/i);
if (rgbm && rgbm.length === 5...
Where's the difference between setObject:forKey: and setValue:forKey: in NSMutableDictionary?
...n, I hardly see any big difference. Both "value" and "object" are of type id , so can be any object. Key is once a string, and in the other case an id. One of them seems to retain the object, and the other don't. What else? Which one is for what case?
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How to change field name in Django REST Framework
...already exists. One should be able to mention the foreign instance via its id.
– stelios
Oct 12 '16 at 20:25
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Grant execute permission for a user on all stored procedures in database?
...
could you please provide an example? lets say i need to grant EXECUTE permissions on all SP's for the user SPExecuter
– Uri Abramson
Apr 25 '13 at 8:59
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What is the most efficient way to create HTML elements using jQuery?
...hnique is the fastest. I speculate this is because jQuery doesn't have to identify it as an element and create the element itself.
You should really run benchmarks with different Javascript engines and weigh your audience with the results. Make a decision from there.
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How to get existing fragments when using FragmentPagerAdapter
...Host . I have implemented FragmentPagerAdapter just as same as it is provided by the Android sample project Support4Demos .
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