The dumbest of blogging systems

1 files changed, 0 insertions, 172 deletions

diff --git a/posts/linear_system_solver.js b/posts/linear_system_solver.js
deleted file mode 100644
index 9eb901f..0000000
--- a/posts/linear_system_solver.js
+++ /dev/null
@@ -1,172 +0,0 @@
-var $ = window.$,
-    rows = 3,
-    columns = 3,
-    currentLhs = [], // rows x columns matrix
-    currentRhs = []; // rows x 1 matrix
-    solutionContainer = $('#solution_container');
-
-function main() {
-    $('#reset_button').on('click', onResetClicked);
-    $('#solve_button').on('click', onSolveClicked);
-    resetView();
-}
-
-function resetView() {
-    renderLHS();
-    renderUnknowns();
-    renderRHS();
-
-    currentLhs = [];
-    currentRhs = [];
-    for (var r = 0; r < rows; r++) {
-        for (var c = 0; c < columns; c++) {
-            currentLhs.push(0);
-        }
-    }
-
-    for (var otherR = 0; otherR < rows; otherR++) {
-        currentRhs.push(0);
-    }
-
-    solutionContainer.empty();
-}
-
-// Renders for the input container.
-function renderLHS() {
-    var lhs = $('#matrix_lhs').empty(),
-        addCell = function(index) {
-            $('<input>').type('number').val(0).on('change',  function(event) {
-                currentLhs[index] = Number(event.target.value);
-            }).appendTo(lhs);
-        };
-
-    for (var r = 0; r < rows; r++) {
-        for (var c = 0; c < columns; c++) {
-            addCell((r * rows) + c);
-        }
-    }
-}
-
-function renderUnknowns() {
-    var unknownsContainer = $('#unknown_variables').empty();
-
-    for (var r = 0; r < columns; r++) {
-        var cell = $('<input>').disabled(true).val(String.fromCharCode('x'.charCodeAt(0) + r).toUpperCase());
-        unknownsContainer.append(cell);
-    }
-}
-
-function renderRHS() {
-    var rhs = $('#matrix_rhs').empty(),
-        addCell = function(index) {
-            $('<input>').type('number').val(0).on('change', function(event) {
-                currentRhs[index] = Number(event.target.value);
-            }).appendTo(rhs);
-        };
-
-    for (var r = 0; r < rows; r++) {
-        addCell(r);
-    }
-}
-
-// Renders for the augmented matrix container
-function renderAugmentedMatrix(lhs, rhs) {
-    var container = $('<div>').addClass('augmented_matrix_container'),
-        lhsContainer = $('<div>').appendTo(container),
-        rhsContainer = $('<div>').appendTo(container),
-        addLhsCell = function(index) {
-            $('<input>').type('number').val(lhs[index]).disabled(true).appendTo(lhsContainer);
-        },
-        addRhsCell = function(index) {
-            $('<input>').type('number').val(rhs[index]).disabled(true).appendTo(rhsContainer);
-        };
-    
-    for (var r = 0; r < rows; r++) {
-        for (var c = 0; c < columns; c++) {
-            addLhsCell(r * rows + c);
-        }
-    }
-
-    for (var otherR = 0; otherR < rows; otherR++) {
-        addRhsCell(otherR);
-    }
-
-    return container;
-}
-
-// Solver helper functions
-function findLargestValue(c, rowStart) {
-    var largestValue = 0,
-        largestRow = -1;
-    for (var r = rowStart; r < rows; r++) {
-        var currValue = Math.abs(currentLhs[r * rows + c]);
-        if (currValue > largestValue) {
-            largestValue = currValue;
-            largestRow = r;
-        }
-    }
-    return {
-        row: largestRow,
-        value: largestValue
-    };
-}
-
-function swapRows(r1, r2) {
-    if (r1 === r2) {
-        return;
-    }
-
-    for (var c = 0; c < columns; c++) {
-        var temp = currentLhs[r1 * row + c];
-        currentLhs[r1 * rows + c] = currentLhs[r2 * row + c];
-        currentLhs[r2 * rows + c] = temp;
-    }
-
-    var rhsTmp = currentRhs[r1];
-    currentRhs[r1] = currentRhs[r2];
-    currentRhs[r2] = rhsTmp;
-}
-
-function multiplyRow(r, scale) {
-    for (var c = 0; c < columns; c++) {
-      currentLhs[r * rows + c] *= scale;
-    }
-
-    currentRhs[r] *= scale;
-}
-
-function addRow(r, a) {
-    for (var c = 0; c < columns; c++) {
-      currentLhs[r * rows + c] += a;
-    }
-
-    currentRhs[r] += a;
-}
-
-// Callbacks for actions
-function onResetClicked() {
-    resetView();
-}
-
-function onSolveClicked() {
-    var rowStart = 0;
-    for (var c = 0; c < columns; c++) {
-        var largestForColumn = findLargestValue(c, rowStart);
-        if (largestForColumn.row >= 0) {
-            swapRows(rowStart, largestForColumn.row);
-            multiplyRow(rowStart, 1.0 / largestForColumn.value);
-
-            for (var r = 0; r < rows; r++) {
-                if (r === rowStart) continue;
-
-            }
-        }
-
-        rowStart++;
-    }
-
-    solutionContainer.append(renderAugmentedMatrix(currentLhs, currentRhs));
-    solutionContainer.append(renderAugmentedMatrix(currentLhs, currentRhs));
-}
-
-main();