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Best way to format integer as string with leading zeros? [duplicate]

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What's quicker and better to determine if an array key exists in PHP?

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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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CSS hexadecimal RGBA?

...and 8-digit hexadecimal RGBA notation! Three weeks ago (18th of December 2014) the CSS Color Module Level 4 editor's draft was submitted to the CSS W3C Working Group. Though in a state which is heavily susceptible to change, the current version of the document implies that in the somewhat near fut...
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Why use strong named assemblies?

... | edited Jun 10 at 14:18 Jan Nils Ferner 2,81422 gold badges1414 silver badges3131 bronze badges ...
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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 normalize a NumPy array to within a certain range?

... 140 audio /= np.max(np.abs(audio),axis=0) image *= (255.0/image.max()) Using /= and *= allows you ...
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)

... 502 I would suggest using the duplicated method on the Pandas Index itself: df3 = df3[~df3.index.du...
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What is the smallest possible valid PDF?

...ting problem. Taking it by the book, you can start off with this: %PDF-1.0 1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj 2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj 3 0 obj<</Type/Page/MediaBox[0 0 3 3]>>endobj xref 0 4 0000000000 65535 f 0000000010 00000 n 00...
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100% width Twitter Bootstrap 3 template

I am a bootstrap newbie and I have a 100% wide template that I want to code with bootstrap. The first column begins at the left corner and I have a Google map the stretches to the rightmost. I thought I could do this with container-fluid class, but that doesn't seem to be available any longer. I h...