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Can you get DB username, pw, database name in Rails?
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From within rails you can create a configuration object and obtain the necessary information from it:
config = Rails.configuration.database_configuration
host = config[Rails.env]["host"]
database = config[Rails.env]["d...
Access parent DataContext from DataTemplate
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At first I thought that the x:Names of parent elements are not accessible from within a templated item, but since I found no better solution, I just tried, and it works fine.
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iPhone app in landscape mode, 2008 systems
Please note that this question is from 2008 and now is of only historic interest.
8 Answers
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Generate colors between red and green for a power meter?
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Another way to do would be to use a HSV colour model, and cycle the hue from 0 degrees (red) to 120 degrees (green) with whatever saturation and value suited you. This should give a more pleasing gradient.
Here's a demonstration of each technique - top gradient uses RGB, bottom uses HSV:
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Retrieve the position (X,Y) of an HTML element relative to the browser window
... If you need it relative to another element, simply subtract one rectangle from the other:
var bodyRect = document.body.getBoundingClientRect(),
elemRect = element.getBoundingClientRect(),
offset = elemRect.top - bodyRect.top;
alert('Element is ' + offset + ' vertical pixels from <bod...
Does Java casting introduce overhead? Why?
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There are 2 types of casting:
Implicit casting, when you cast from a type to a wider type, which is done automatically and there is no overhead:
String s = "Cast";
Object o = s; // implicit casting
Explicit casting, when you go from a wider type to a more narrow one. For this case, y...
jQuery, simple polling example
...of them. we should not be making any new requests until we get the results from the last request
– Johnny Craig
Jul 26 '11 at 21:47
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What does “xmlns” in XML mean?
... that needs to be unique so as to indicate that it is a separate namespace from others and any potential duplicate tags will therefore be interpreted correctly. So the URI will often point to nothing.
– foochow
Jan 27 '14 at 19:52
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PHP append one array to another (not array_push or +)
... Just be careful if your keys are not a numbers but strings, From doc: If the input arrays have the same string keys, then the later value for that key will overwrite the previous one
– Dusan Plavak
Feb 5 '16 at 1:53
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How to find all links / pages on a website
...website? I'd like to enter a URL and produce a directory tree of all links from that site?
5 Answers
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