1 views collected around this technical thread.
This article explains JavaScript objects, various ways to create them, the role of prototypes and the hidden __proto__ property, and how the prototype chain enables inheritance, illustrated with clear code examples and diagrams for front‑end developers.
This article provides an in‑depth overview of JavaScript's Object methods—including defineProperty, defineProperties, assign, create, freeze, seal, preventExtensions, fromEntries, hasOwnProperty, hasOwn, getOwnPropertyNames, getOwnPropertySymbols, getPrototypeOf, setPrototypeOf, isPrototypeOf, getOwnPropertyDescriptor, getOwnPropertyDescriptors, propertyIsEnumerable, keys, values, entries, is, and groupBy—explaining their purpose, parameters, behavior, and offering practical code examples for each.
This article explains the PHP count() function, covering its syntax, required and optional parameters, return values, practical examples for arrays, objects, and multidimensional structures, as well as common pitfalls and best practices for accurate length calculations.
This article explains why Java developers must override both hashCode() and equals() methods for proper object comparison in hash-based collections, outlines the scenarios requiring such overrides, and provides detailed example code demonstrating correct implementations.
The article explains PHP's count() function (alias sizeof()), its syntax, parameters—including the optional COUNT_RECURSIVE mode—and demonstrates how to count array elements and object properties with practical code examples, highlighting return values and behavior with null or non‑countable inputs.
The PHP count() function returns the number of elements in an array or the number of properties in an object, with an optional recursive mode for multidimensional arrays, and includes details on its signature, parameters, return values, and practical code examples.
This article explains how Java's hashCode() and equals() methods interact, illustrates their behavior with and without hash‑based collections through multiple code examples, and outlines the essential principles developers must follow when overriding these methods to ensure correct functionality in hash tables.
This article reviews the 13 methods of Java's java.lang.Object class, explaining their purpose, typical usage in interviews, and related follow‑up questions such as equals vs ==, hashCode relationship, thread communication, and garbage collection.
This article explains Java object cloning, detailing why cloning is needed, how to implement shallow and deep copies using the Cloneable interface and serialization, and provides comprehensive code examples illustrating the differences and pitfalls of reference copying.
This article explains the default implementations of Java's Object.equals() and Object.hashCode(), the required contracts for overriding them, demonstrates their behavior in the String class, and provides practical guidelines and example code for correctly overriding these methods in custom classes.