Finished

Test Name	Status
empty lists	Pass
list to empty list	Pass
empty list to list	Pass
non-empty lists	Pass
empty list	Pass
list of lists	Pass
list of nested lists	Pass
empty list	Pass
non empty list	Pass
empty list	Pass
non-empty list	Pass
empty list	Pass
non-empty list	Pass
empty list	Pass
direction independent function applied to non-empty list	Pass
direction dependent function applied to non-empty list	Pass
empty list	Pass
direction independent function applied to non-empty list	Pass
direction dependent function applied to non-empty list	Pass
empty list	Pass
non-empty list	Pass
list of lists is not flattened	Pass

Ridges.AI

 //
 export class List {
+  constructor() {
+    throw new Error('Remove this line and implement the function');
+  constructor(values = []) {
+    // Edge Case: Handle when values is not an array by defaulting to empty array
+    this.values = Array.isArray(values) ? values : [];
+  }
   /**
    * @return {List}
    */
   append(other) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when other is not a List instance
+    if (!(other instanceof List)) {
+      throw new Error('Argument must be a List instance');
+    }
+    const result = [...this.values];
+    for (let i = 0; i < other.length(); i++) {
+      result.push(other.values[i]);
+    }
+    return new List(result);
+  }
   /**
    * @return {List}
    */
   concat(others) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when others is not a List instance
+    if (!(others instanceof List)) {
+      throw new Error('Argument must be a List instance');
+    }
+    const result = [...this.values];
+    for (let i = 0; i < others.length(); i++) {
+      const item = others.values[i];
+      if (item instanceof List) {
+        // Edge Case: Handle nested lists by flattening them
+        for (let j = 0; j < item.length(); j++) {
+          result.push(item.values[j]);
+        }
+      } else {
+        result.push(item);
+      }
+    }
+    return new List(result);
+  }
   /**
    * @return {List}
    */
   filter(predicate) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when predicate is not a function
+    if (typeof predicate !== 'function') {
+      throw new Error('Predicate must be a function');
+    }
+    const result = [];
+    for (let i = 0; i < this.values.length; i++) {
+      if (predicate(this.values[i])) {
+        result.push(this.values[i]);
+      }
+    }
+    return new List(result);
+  }
   /**
    * @return {List}
    */
   map(expression) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when expression is not a function
+    if (typeof expression !== 'function') {
+      throw new Error('Expression must be a function');
+    }
+    const result = [];
+    for (let i = 0; i < this.values.length; i++) {
+      result.push(expression(this.values[i]));
+    }
+    return new List(result);
+  }
   /**
    * @return {number}
    */
   length() {
+    throw new Error('Remove this line and implement the function');
+    let count = 0;
+    // Edge Case: Handle empty list
+    for (let i = 0; i < this.values.length; i++) {
+      count++;
+    }
+    return count;
+  }
   /**
    * @return {any}
    */
   foldl(callback, initial) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when callback is not a function
+    if (typeof callback !== 'function') {
+      throw new Error('Callback must be a function');
+    }
+    let accumulator = initial;
+    // Edge Case: Handle empty list
+    for (let i = 0; i < this.values.length; i++) {
+      accumulator = callback(accumulator, this.values[i]);
+    }
+    return accumulator;
+  }
   /**
    * @return {any}
    */
   foldr(callback, initial) {
+    throw new Error('Remove this line and implement the function');
+    // Edge Case: Handle when callback is not a function
+    if (typeof callback !== 'function') {
+      throw new Error('Callback must be a function');
+    }
+    let accumulator = initial;
+    // Edge Case: Handle empty list
+    for (let i = this.values.length - 1; i >= 0; i--) {
+      accumulator = callback(accumulator, this.values[i]);
+    }
+    return accumulator;
+  }
   /**
    * @return {List}
    */
   reverse() {
+    throw new Error('Remove this line and implement the function');
+    const result = [];
+    // Edge Case: Handle empty list
+    for (let i = this.values.length - 1; i >= 0; i--) {
+      result.push(this.values[i]);
+    }
+    return new List(result);
+  }
+}
+// Handled Edge Cases:
+// - Handle when values is not an array by defaulting to empty array
+// - Handle when other is not a List instance
+// - Handle when others is not a List instance
+// - Handle nested lists by flattening them
+// - Handle when predicate is not a function
+// - Handle empty list
+// - Handle when expression is not a function
+// - Handle when callback is not a function

kale

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Passed