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# Avi Tevet avitevet

Created Sep 24, 2013
general string left padding function in coffeescript
 # val = the value to pad # length = the length of the padded string # padChar = the character to use for padding. Defaults to '0' pad = (val, length, padChar = '0') -> val += '' numPads = length - val.length if (numPads > 0) then new Array(numPads + 1).join(padChar) + val else val
Last active Jul 28, 2019
A reference sheet for the terminology and formulas used in the Simplex Algorithm of linear programming problems
View SimplexAlgorithmReferenceSheet.md

# Simplex Algorithm Reference Sheet

The simplex algorithm is a method for maximizing or minimizing a linear equation given a set of linear constraints on the variables in the equation.

## Definitions

Linear equality
f(x1, x2, .., xn) = b
Linear inequality
Created Mar 10, 2017
How to perform accurate & high-resolution performance measurement in "recent" Windows on "recent" x86 processors
View accurateWindowsPerformanceMeasurement.cpp
 #include #include // Shows how to perform accurate performance measurements on modern Windows in application-level code // on x86 processors. // // Mostly from https://msdn.microsoft.com/en-us/library/windows/desktop/dn553408(v=vs.85).aspx. // The QueryPerformanceCounter is an abstraction around the processor time-stamp counter, which // starts at zero when the processor is reset and increments monotonically each cycle. //
Created Apr 6, 2017
Using linear programming/simplex method to solve the diet problem: given a set of foods with nutritional data, and a set of nutritional constraints, find the cheapest combination of foods that meets your nutritional needs.
View diet.cpp
 #include #include #include #include #include using namespace std; typedef double ElementType; typedef vector> matrix;
Last active Jan 23, 2018
How to perform accurate performance measurements on OS X
View accurateOSXPerformanceMeasurements.cpp
 #include #include // Shows how to perform accurate performance measurements on modern OS X in application-level code // on x86 processors. // // Performance monitoring on Intel processors is a challenge because the behavior of the internal // processor counters has changed over the years. Also, processor frequency used to be fixed, // but with the introduction of SpeedStep technology the processor frequency may change at