figbertmath

commit 860e88d83b9e32e9db4f1a56d7e23b6e16592b0e
parent baab68b5a12bcd8ee673d97587141ec825b63185
Author: therealFIGBERT <figbertwelner@gmail.com>
Date:   Thu,  5 Dec 2019 15:32:51 -0800

Add functionality to the simultaneous equation calculator

This update implements a function to check, on change of input values, if the calculator should solve the equation. If it detects that the necessary values have been provided, it passes a deep copy to the solve function which calculates the output using the Gaussian theorem.

The READEME has been updated to reflect the calculator's completion.

Diffstat:
M
README.md
 | 
5
++---
M
src/components/highLevel/simultaneousEquation.js
 | 
34
++++++++++++++++++++++++++++++++--

2 files changed, 34 insertions(+), 5 deletions(-)
diff --git a/README.md b/README.md
@@ -5,8 +5,8 @@ A calculator for miscellaneous formulas I encounter that can, and thus shall, be
 * Simple Calculator
 * Angular/Real Size Calculator
 * Consecutive Number Calculator
+* Simultaneous Equation Calculator
 * Polygon Angle Calculator
 
 ## Planned
-* Simultaneous Equation Calculator
-* Forces and Energy Calculator
-\ No newline at end of file
+* Forces and Energy Calculator
diff --git a/src/components/highLevel/simultaneousEquation.js b/src/components/highLevel/simultaneousEquation.js
@@ -13,6 +13,7 @@ export class SimultaneousEquation extends React.Component {
             coefficients: [['', ''], ['', '']],
             sums: ['', '']
         };
+        this.checkSolve = this.checkSolve.bind(this);
         this.modifyMatrix = this.modifyMatrix.bind(this);
         this.solveMatrix = this.solveMatrix.bind(this);
         this.onChange = this.onChange.bind(this);
@@ -28,11 +29,15 @@ export class SimultaneousEquation extends React.Component {
             k = Number(name.split('_')[1]);
             this.setState({
                 coefficients: update(this.state.coefficients, {[i]: {[k]: {$set: value}}})
+            }, () => {
+                this.checkSolve()
             });
         } else if (name.indexOf('s') > -1) {
             i = Number(name.substr(1));
             this.setState({
                 sums: update(this.state.sums, {[i]: {$set: value}})
+            }, () => {
+                this.checkSolve()
             });
         } else {
             this.setState({
@@ -41,6 +46,32 @@ export class SimultaneousEquation extends React.Component {
         }
     }
 
+    checkSolve() {
+        const coefficients = JSON.parse(JSON.stringify(this.state.coefficients)),
+            sums = JSON.parse(JSON.stringify(this.state.sums));
+        let truth = true;
+        for (let i = 0; i < coefficients.length; i++) {
+            for (let k = 0; k < coefficients[i].length; k ++) {
+                if (coefficients[i][k] === '') {
+                    truth = false;
+                } else {
+                    coefficients[i][k] = Number(coefficients[i][k]);
+                }
+            }
+        }
+        if (truth) {
+            for (let i = 0; i < sums.length; i++) {
+                if (sums[i] === '') {
+                    truth = false;
+                } else {
+                    sums[i] = Number(sums[i]);
+                }
+            }
+        }
+        if (truth) {
+            this.solveMatrix(coefficients, sums)
+        }
+    }
 
     modifyMatrix(object) {
         const value = object.target.value;
@@ -153,4 +184,4 @@ export class SimultaneousEquation extends React.Component {
 SimultaneousEquation.propTypes = {
     mode: PropTypes.string.isRequired,
     onModeChange: PropTypes.func.isRequired
-};
-\ No newline at end of file
+};