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How to automatically generate N “distinct” colors?
I wrote the two methods below to automatically select N distinct colors. It works by defining a piecewise linear function on the RGB cube. The benefit of this is you can also get a progressive scale if that's what you want, but when N gets large the colors can start to look similar. I can also imagi...
Border around specific rows in a table?
...etty dynamic data. Using nth-child(), nth-last-child(), and not(), you can select any rows/cells you want (as long as you know the relative indexes of things in the table). For example, you can select all rows except the top two and bottom one with tr:not(:nth-child(-n+2)):not(:nth-last-child(1))
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“Diff” an image using ImageMagick
...th layers, 3) remove alpha channels from both layers in the Layers tab, 4) select the G + B channels on one layer, select all and clear the channels with black color, the same with the R + B channels on the second layer, 4) set Screen mode for the upper layer in the Layers tab.
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Can the :not() pseudo-class have multiple arguments?
I'm trying to select input elements of all type s except radio and checkbox .
5 Answers
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How to flatten tree via LINQ?
...IEnumerable<MyNode> Flatten(IEnumerable<MyNode> e) =>
e.SelectMany(c => Flatten(c.Elements)).Concat(new[] { e });
You can then filter by group using Where(...).
To earn some "points for style", convert Flatten to an extension function in a static class.
public static IEnume...
Representing and solving a maze given an image
...otoshop in Image -> Adjustments -> Threshold.
Make sure threshold is selected right. Use the Magic Wand Tool with 0 tolerance, point sample, contiguous, no anti-aliasing. Check that edges at which selection breaks are not false edges introduced by wrong threshold. In fact, all interior points ...
What are the differences between delegates and events?
...custom user control that shows the properties of that person. When someone selects a person in the drop-down the labels in the user control update to show the properties of the person selected.
Here is how that works. We have three files that help us put this together:
Mediator.cs -- static cla...
How can I write a regex which matches non greedy? [duplicate]
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The non-greedy ? works perfectly fine. It's just that you need to select dot matches all option in the regex engines (regexpal, the engine you used, also has this option) you are testing with. This is because, regex engines generally don't match line breaks when you use .. You need to tell ...
How to check status of PostgreSQL server Mac OS X
...using psql to run a simple query and checking the exit code, e.g. psql -c 'SELECT 1', or use pg_isready to check the connection status.
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if checkbox is checked, do this
...heckbox').click(function(){
var chk = $(this);
$('p').toggleClass('selected', chk.attr('checked'));
})
in this way your code it's cleaner because you don't have to specify all css properties (let's say you want to add a border, a text style or other...) but you just switch a class
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