Skip to content

Instantly share code, notes, and snippets.

@shravanipl
Created July 10, 2018 01:35
Show Gist options
  • Save shravanipl/00d1588da90dd5b70cea1fa55457eaac to your computer and use it in GitHub Desktop.
Save shravanipl/00d1588da90dd5b70cea1fa55457eaac to your computer and use it in GitHub Desktop.
arrays
function shortWords(array) {
const short = array.filter( x => x.length<5);
return short;
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
// tests
function testFunctionWorks(fn, input, expected) {
const result = fn(input);
if (
result &&
result.length === expected.length &&
result.every(function(item) {
return expected.indexOf(item) > -1;
})
) {
console.log('SUCCESS: `' + fn.name + '` works!');
return true;
} else {
console.error(
'FAILURE: `' +
fn.name +
'([' +
input +
'])` should be ' +
expected +
' but was ' +
fn(input)
);
return false;
}
}
function runTests() {
const input1 = ['cat', 'oblivion', 'dog', 'patriarchy', 'blue', 'house'];
const result1 = ['cat', 'dog', 'blue'];
const input2 = ['rainbow', 'the', 'big', 'broom'];
const result2 = ['the', 'big'];
const testResults = [
testFunctionWorks(shortWords, input1, result1),
testFunctionWorks(shortWords, input2, result2),
];
const numPassing = testResults.filter(function(result) {
return result;
}).length;
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}
runTests();
function divisibleBy5(array) {
const div = array.find(x=> x%5=== 0);
return div;
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
// tests
function testFunctionWorks(fn, input, expected) {
if (fn(input) === expected) {
console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
return true;
} else {
console.error(
'FAILURE: `' +
fn.name +
'([' +
input +
'])` should be ' +
expected +
' but was ' +
fn(input)
);
return false;
}
}
function runTests() {
const input1 = [13, 22, 4, 47, 15, 35, 82];
const result1 = 15;
const input2 = [25, 20, 15, 10, 5];
const result2 = 25;
const testResults = [
testFunctionWorks(divisibleBy5, input1, result1),
testFunctionWorks(divisibleBy5, input2, result2),
];
const numPassing = testResults.filter(function(result) {
return result;
}).length;
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}
runTests();
function minusLastItem(array) {
return array.slice(0,array.length-1);
}
function copyFirstHalf(array) {
return array.slice(0,array.length/2);
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
// tests
function testFunctionWorks(fn, input, expected) {
const result = fn(input);
if (
result &&
result.length === expected.length &&
result.every(function(item) {
return expected.indexOf(item) > -1;
})
) {
console.log('SUCCESS: `' + fn.name + '` works!');
return true;
} else {
console.error('FAILURE: `' + fn.name + '` is not working');
return false;
}
}
function runTests() {
const list = [
'red bull',
'monster',
'amp',
'rockstar',
'full throttle',
'kickstart',
];
const result1 = ['red bull', 'monster', 'amp', 'rockstar', 'full throttle'];
const result2 = ['red bull', 'monster', 'amp'];
const list2 = ['lions', 'tigers', 'bears'];
const result3 = ['lions'];
const testResults = [
testFunctionWorks(minusLastItem, list, result1),
testFunctionWorks(copyFirstHalf, list, result2),
testFunctionWorks(copyFirstHalf, list2, result3)
];
const numPassing = testResults.filter(function(result) {
return result;
}).length;
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}
runTests();
function greatestToLeast(array) {
return array.sort( (x,y) => y-x);
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
// tests
function testFunctionWorks(fn, input, expected) {
const result = fn(input);
if (
result &&
result.length === expected.length &&
result.every(function(item, index) {
return index === 0 || result[index] < result[index - 1];
}) &&
result.every(function(item) {
return expected.indexOf(item) > -1;
})
) {
console.log('SUCCESS: `' + fn.name + '` works!');
return true;
} else {
console.error(
'FAILURE: `' +
fn.name +
'([' +
input +
'])` should be ' +
expected +
' but was ' +
fn(input)
);
return false;
}
}
function runTests() {
const input1 = [10, 3, 5, 22, 19];
const result1 = [22, 19, 10, 5, 3];
const input2 = [2, 4, 6, 8];
const result2 = [8, 6, 4, 2];
const testResults = [
testFunctionWorks(greatestToLeast, input1, result1),
testFunctionWorks(greatestToLeast, input2, result2),
];
const numPassing = testResults.filter(function(result) {
return result;
}).length;
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}
runTests();
function squares(array) {
const square= array.map(x=>x*x);
return square;
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
// tests
function testFunctionWorks(fn, input, expected) {
const result = fn(input);
if (
result &&
result.length === expected.length &&
result.every(function(item) {
return expected.indexOf(item) > -1;
})
) {
console.log('SUCCESS: `' + fn.name + '` works!');
return true;
} else {
console.error(
'FAILURE: `' +
fn.name +
'([' +
input +
'])` should be ' +
expected +
' but was ' +
fn(input)
);
return false;
}
}
function runTests() {
const input1 = [1, 2, 3, 4, 5];
const result1 = [1, 4, 9, 16, 25];
const input2 = [2, 4, 6, 8];
const result2 = [4, 16, 36, 64];
const testResults = [
testFunctionWorks(squares, input1, result1),
testFunctionWorks(squares, input2, result2),
];
const numPassing = testResults.filter(function(result) {
return result;
}).length;
console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}
runTests();
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment