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What does -1 mean in numpy reshape?

...atrix can be reshaped into a vector using reshape function with parameter -1. But I don't know what -1 means here. 9 Answer...
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Get operating system info

...that, it sniffs your core operating system model, for example windows nt 5.1 as my own. It then passes windows nt 5.1/i to Windows XP as the operating system. Using: '/windows nt 5.1/i' => 'Windows XP', from an array. You could say guesswork, or an approximation yet nonetheless pretty much ba...
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PHP Regex to check date is in YYYY-MM-DD format

... 198 Try this. $date="2012-09-12"; if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|...
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Convert tuple to list and back

... answered May 6 '14 at 14:27 KhonixKhonix 3,32311 gold badge1111 silver badges1515 bronze badges ...
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Remove duplicate elements from array in Ruby

... the Tin Man 147k3131 gold badges192192 silver badges272272 bronze badges answered Dec 3 '11 at 5:24 Mithun Sasidh...
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How to make an OpenGL rendering context with transparent background?

...e below: The code has been tested on Windows XP (32-bits) and Windows 8.1 (32-bits). Enjoy! #define _WIN32_WINNT 0x0500 #include <windows.h> #include <windowsx.h> #include <GL/gl.h> #include <GL/glu.h> #pragma comment (lib, "opengl32.lib") #pragma comment (lib, "glu32.l...
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What is the best regular expression to check if a string is a valid URL?

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Determining complexity for recursive functions (Big O notation)

...he time complexity, in Big O notation, for each function: int recursiveFun1(int n) { if (n <= 0) return 1; else return 1 + recursiveFun1(n-1); } This function is being called recursively n times before reaching the base case so its O(n), often called linear. int recursi...
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Why does 1==1==1 return true, “1”==“1”==“1” return true, and “a...

... 185 Because you are comparing the (boolean) result of the first equality with the (non-boolean) th...
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Dynamically update values of a chartjs chart

... 14 Answers 14 Active ...