To figure something out in JavaScript, the following steps can be helpful:
Define the problem: Identify the requirements and constraints of the problem. Break the big problem into smaller, more manageable sub-problems.
index.tsx
// Defining a problem// Create a function to check if a given number is even or oddfunctionisEven(num) {
// code to check if the number is even}
isEven(5); // Should return false
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Plan the solution: Develop a plan to solve the sub-problems. This may involve writing pseudocode or drawing diagrams.
index.tsx
// Plan the solution// Create a function to check if a given number is even or odd// 1. Define a function to take in a number as a parameterfunctionisEven(num) {
// 2. Check if the number is even by using the modulo operatorif (num % 2 === 0) {
returntrue; // 3a. If the number is even, return true } else {
returnfalse; // 3b. If the number is odd, return false }
}
isEven(5); // Should return false
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Code the solution: Write the code based on the plan. Test the code to see if it works as expected.
index.tsx
// Code the solution// Create a function to check if a given number is even or oddfunctionisEven(num) {
if (num % 2 === 0) {
returntrue;
} else {
returnfalse;
}
}
isEven(5); // falseisEven(2); // true
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Test the solution: Test the code with different inputs and edge cases to ensure it works as expected. Debug and refine the solution as necessary.
index.tsx
// Test the solution// Create a function to check if a given number is even or oddfunctionisEven(num) {
if (num % 2 === 0) {
returntrue;
} else {
returnfalse;
}
}
console.log(isEven(5)); // falseconsole.log(isEven(2)); // trueconsole.log(isEven("hello")); // false (edge case)
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Maintain the solution: Maintain the code by updating it as the requirements and constraints change. Refactor the code to make it more efficient or readable as necessary.
index.tsx
// Maintain the solution// Create a function to check if a given number is even or oddfunctionisEven(num) {
if (typeof num === "number") { // Edge case: check if the input is a numberreturn num % 2 === 0;
} else {
returnfalse;
}
}
console.log(isEven(5)); // falseconsole.log(isEven(2)); // trueconsole.log(isEven("hello")); // false (edge case)