javascript-lp-solver/src/Tableau/Solution.js

Easy to use, JSON oriented Linear Programming and Mixed Int. Programming Solver

/*global module*/

function Solution(tableau, evaluation, feasible, bounded) {
    this.feasible = feasible;
    this.evaluation = evaluation;
    this.bounded = bounded;
    this._tableau = tableau;
}
module.exports = Solution;

Solution.prototype.generateSolutionSet = function () {
    var solutionSet = {};

    var tableau = this._tableau;
    var varIndexByRow = tableau.varIndexByRow;
    var variablesPerIndex = tableau.variablesPerIndex;
    var matrix = tableau.matrix;
    var rhsColumn = tableau.rhsColumn;
    var lastRow = tableau.height - 1;
    var roundingCoeff = Math.round(1 / tableau.precision);

    for (var r = 1; r <= lastRow; r += 1) {
        var varIndex = varIndexByRow[r];
        var variable = variablesPerIndex[varIndex];
        if (variable === undefined || variable.isSlack === true) {
            continue;
        }

        var varValue = matrix[r][rhsColumn];
        solutionSet[variable.id] =
            Math.round((Number.EPSILON + varValue) * roundingCoeff) / roundingCoeff;
    }

    return solutionSet;
};