Refactor utils

Author: raharrison

build.gradle.kts

@@ -11,16 +11,14 @@ java {
         languageVersion = JavaLanguageVersion.of(25)
     }
     withSourcesJar()
-    withJavadocJar()
+//    withJavadocJar()
 }
 
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    implementation("org.apache.commons:commons-lang3:3.17.0")
-
     testImplementation(platform("org.junit:junit-bom:5.11.4"))
     testImplementation("org.junit.jupiter:junit-jupiter")
     testImplementation("org.assertj:assertj-core:3.27.6")
@@ -33,24 +31,13 @@ tasks.test {
 
     // Improved test output configuration for better feedback
     testLogging {
-        events("passed", "skipped", "failed", "standardOut", "standardError")
+        events("skipped", "failed")
 
         // Show exceptions and their causes
         exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
         showExceptions = true
         showCauses = true
         showStackTraces = true
-
-        // Display detailed test results
-        showStandardStreams = false // Set to true for debugging specific tests
-
-        // Summary after test run
-        displayGranularity = 2
-
-        // Show individual test results as they run
-        info {
-            events("passed", "skipped", "failed", "standardOut", "standardError")
-        }
     }
 
     // Generate detailed HTML reports for better analysis

src/main/java/uk/co/ryanharrison/mathengine/differential/symbolic/Differentiator.java

@@ -1,6 +1,5 @@
 package uk.co.ryanharrison.mathengine.differential.symbolic;
 
-import org.apache.commons.lang3.StringUtils;
 import uk.co.ryanharrison.mathengine.Function;
 import uk.co.ryanharrison.mathengine.utils.Utils;
 
@@ -180,7 +179,7 @@ private static String optimizeSign(String s) {
         // replace "--" with "" or "+"
         while ((index = str.indexOf("--", index)) != -1)
             if (index == 0
-                    || StringUtils.indexOfAny(str.substring(index - 1), '(', '+', '-', '/',
+                    || Utils.indexOfAny(str.substring(index - 1), '(', '+', '-', '/',
                     '*', '^') != -1) {
                 str = str.delete(index, index + 2);
             } else {
@@ -195,7 +194,7 @@ private static String optimizeSign(String s) {
     private static String trim(double d) {
         String str = Double.toString(d);
         if (str.indexOf('.') != -1)
-            str = StringUtils.stripEnd(str, "0");
-        return StringUtils.stripEnd(str, ".");
+            str = Utils.stripEnd(str, "0");
+        return Utils.stripEnd(str, ".");
     }
 }

src/main/java/uk/co/ryanharrison/mathengine/differential/symbolic/ExpressionItem.java

@@ -1,6 +1,5 @@
 package uk.co.ryanharrison.mathengine.differential.symbolic;
 
-import org.apache.commons.lang3.StringUtils;
 import uk.co.ryanharrison.mathengine.Function;
 import uk.co.ryanharrison.mathengine.utils.Utils;
 
@@ -20,7 +19,7 @@ public ExpressionItem(String input) {
     }
 
     public String getInput() {
-        if ((!Utils.isNumeric(input) && !input.equals("pi") && !input.equals("e")) && StringUtils.indexOfAny(input, operators) != -1)
+        if ((!Utils.isNumeric(input) && !input.equals("pi") && !input.equals("e")) && Utils.indexOfAny(input, operators) != -1)
             return '(' + input + ')';
         return input;
     }