Created
January 16, 2023 16:56
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Write a function that takes two strings (a and b) as arguments. Return the number of times a occurs in b.
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/* | |
Write a function that takes two strings (a and b) as arguments. Return the number of times a occurs in b. | |
Test Cases: | |
myFunction('m', 'how many times does the character occur in this sentence?') | |
Expected 2 | |
myFunction('h', 'how many times does the character occur in this sentence?') | |
Expected 4 | |
myFunction('?', 'how many times does the character occur in this sentence?') | |
Expected 1 | |
myFunction('z', 'how many times does the character occur in this sentence?') | |
Expected 0 | |
Using JavaScript Search methods | |
*/ | |
function search(a,b){ | |
if(!a || !b){ | |
throw new Error("Missing arguements, Both arguements required."); | |
} | |
const subStr = a.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); | |
const re = new RegExp(subStr, "gi"); | |
return (b.match(re) || []).length | |
} | |
// Test cases | |
{ | |
// Test Case 1: Expected 2 | |
const expected = 2; | |
const result = search('m', 'how many times does the character occur in this sentence?'); | |
console.log('Test case 1:', result === expected ? 'Passed': 'Failed'); | |
} | |
{ | |
// Expected 4 | |
const expected = 4; | |
const result =search('h', 'how many times does the character occur in this sentence?') | |
console.log('Test case 2:', result === expected ? 'Passed': 'Failed'); | |
} | |
{ | |
// Expected 1 | |
const expected = 1; | |
const result =search('?', 'how many times does the character occur in this sentence?') | |
console.log('Test case 3:', result === expected ? 'Passed': 'Failed'); | |
} | |
{ | |
const expected = 0; | |
const result = search('z', 'how many times does the character occur in this sentence?'); | |
console.log('Test case 4:', result === expected ? 'Passed': 'Failed'); | |
} | |
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