//Higher-Order Functions
Functions that operate on other functions, either by taking them as arguments or by returning them, are called higher-order functionsfunction (n) => {
unless(n%2 == 1, () => {
console.log(`${n} is even`);
});function evenNumberFilter(number) {
return number %2 == 0
}
function oddNumberFilter(number) {
return !evenNumberFilter(number)
}
function filter(predicate) {
const result = []
for(number=0; number<10; number++) {
if (predicate(number)) {
result.push(number)
}
}
return result
}
filter(evenNumberFilter); //[0,2,4,6,8]
filter(oddNumberFilter); //[1,3,5,7,9]function evenNumberFilter(number) {
return number %2 == 0
}
function oddNumberFilter(number) {
return !evenNumberFilter(number)
}
function evenNumberBeforeTen() {
const result = []
for(number=0; number<10; number++) {
if (evenNumberFilter(number)) {
result.push(number)
}
}
return result
}
function oddNumberBeforeTen() {
const result = []
for(number=0; number<10; number++) {
if (oddNumberFilter(number)) {
result.push(number)
}
}
return result
}
evenNumberBeforeTen(); //[0,2,4,6,8]
oddNumberBeforeTen(); //[1,3,5,7,9]function() => {
console.log(`${n} is even`);
});repeat(3, n => {
unless(n%2 == 1, () => {
console.log(`${n} is even`);
});
});