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How to check if a given directory exists in Ruby
...atic way to write the method would be to take advantage of the fact that Ruby automatically returns the result of the last expression inside the method. Thus, you could write it like this:
def directory_exists?(directory)
File.directory?(directory)
end
Note that using a method is not necessary ...
Function of Project > Clean in Eclipse
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How to convert a NumPy array to PIL image applying matplotlib colormap
..._earth is an instance), I discovered that it's possible to call it with a "bytes" argument which already converts it to uint8. Then, the one-liner gets a lot quieter: im = Image.fromarray(cm.gist_earth(myarray, bytes=True))
– heltonbiker
Jun 13 '12 at 4:20
...
count members with jsonpath?
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Convert a RGB Color Value to a Hexadecimal String
...
This is an adapted version of the answer given by Vivien Barousse with the update from Vulcan applied. In this example I use sliders to dynamically retreive the RGB values from three sliders and display that color in a rectangle. Then in method toHex() I use the values to...
Data structure for loaded dice?
...t documented in chapter 3 (PDF) of "Non-Uniform Random Variate Generation" by Luc Devroye.
The idea is to take your array of probabilities pk and produce three new n-element arrays, qk, ak, and bk. Each qk is a probability between 0 and 1, and each ak and bk is an integer between 1 and n.
We gene...
Replace a value if null or undefined in JavaScript
...}
var filter2 = options.filters[1] || ''; // is ''
That can be accessed by index.
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C#: List All Classes in Assembly
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Is there a way to specify an “empty” C# lambda expression?
...;
// Another example:
var lOrderedStrings = GetCollectionOfStrings().OrderBy(Functions.Identity);
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Why specify @charset “UTF-8”; in your CSS file?
...acter set of a stylesheet are in order of priority:
HTTP Charset header.
Byte Order Mark.
The first @charset rule.
UTF-8.
The last rule is the weakest, it will fail in some browsers.
The charset attribute in <link rel='stylesheet' charset='utf-8'> is obsolete in HTML 5.
Watch out for conf...