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Generate array of all letters and digits

...g ruby, is it possible to make an array of each letter in the alphabet and 0-9 easily? 7 Answers ...
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How to smooth a curve in the right way?

...bove. import numpy as np import matplotlib.pyplot as plt x = np.linspace(0,2*np.pi,100) y = np.sin(x) + np.random.random(100) * 0.2 yhat = savitzky_golay(y, 51, 3) # window size 51, polynomial order 3 plt.plot(x,y) plt.plot(x,yhat, color='red') plt.show() UPDATE: It has come to my attention t...
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How to read the content of a file to a string in C?

...-codes for fseek, ftell and fread. (omitted for clarity). char * buffer = 0; long length; FILE * f = fopen (filename, "rb"); if (f) { fseek (f, 0, SEEK_END); length = ftell (f); fseek (f, 0, SEEK_SET); buffer = malloc (length); if (buffer) { fread (buffer, 1, length, f); } fclo...
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Simple way to create matrix of random numbers

... Take a look at numpy.random.rand: Docstring: rand(d0, d1, ..., dn) Random values in a given shape. Create an array of the given shape and propagate it with random samples from a uniform distribution over [0, 1). >>> import numpy as np >>> np....
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Knight's Shortest Path on Chessboard

...ves are connected (value=1), and unavailable moves are disconnected (value=0), the sparse matrix would be like: (a1,b3)=1, (a1,c2)=1, ..... And the shortest path of two points in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm Pseudo-code from wikipedia-page: func...
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How do I apply CSS3 transition to all properties except background-position?

... Here's a solution that also works on Firefox: transition: all 0.3s ease, background-position 1ms; I made a small demo: http://jsfiddle.net/aWzwh/ share | improve this answer ...
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Turn a number into star rating display using jQuery and CSS

...tars, span.stars span { display: block; background: url(stars.png) 0 -16px repeat-x; width: 80px; height: 16px; } span.stars span { background-position: 0 0; } Image (source: ulmanen.fi) Note: do NOT hotlink to the above image! Copy the file to your own server and u...
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Tetris-ing an array

... answered Jul 18 '10 at 13:05 starbluestarblue 50.3k1414 gold badges8484 silver badges142142 bronze badges ...
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Geometric Mean: is there a built-in?

...ositive values. gm_mean = function(x, na.rm=TRUE){ exp(sum(log(x[x > 0]), na.rm=na.rm) / length(x)) } Thanks to @ben-bolker for noting the na.rm pass-through and @Gregor for making sure it works correctly. I think some of the comments are related to a false-equivalency of NA values in the d...
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Check that an email address is valid on iOS [duplicate]

...ng { BOOL stricterFilter = NO; // Discussion http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/ NSString *stricterFilterString = @"^[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}$"; NSString *laxString = @"^.+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*$"; NSString *ema...