D
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2020 June 16
p
так не правильная же
почему? в консоль выводит
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
L
persona x grata
почему? в консоль выводит
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
const makeObject = (a1, a2) => a1.map((id, i) => ({id, name: a2[i]}))L
persona x grata
почему? в консоль выводит
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
```Надо сделать чтобы функция вернула
[{id:2, name:'Alice'}, {id:5, name:'Bob'}, {id:16, name:'John'}, {id:63, name:'Mary'}, {id:74, name:'Max'}]```L
persona x grata
почему? в консоль выводит
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
[ { '2': 'Alice', '5': 'Bob', '16': 'John', '63': 'Mary', '74': 'Max' } ]
разобрался7
p
разобрался7
да, не внимательно прочитал
L
p
Create a function getRemainder that takes two numbers and returns the remainder (value left over from division) of dividing the larger number by the smaller one.
Hint- You have no guarantee which number will be the bigger number, how can you determine which is which?
Hint- You have no guarantee which number will be the bigger number, how can you determine which is which?
function getRemainder(num1, num2) {
return Math.max(num1, num2) % Math.min(num1, num2)
}
console.log(getRemainder(17, 5)); //=> 2
console.log(getRemainder(20, 5)); //=> 0
console.log(getRemainder(8, 22)); //=> 6
console.log(getRemainder(7, 42)); //=> 0p
как еще можно?
L
persona x grata
Create a function getRemainder that takes two numbers and returns the remainder (value left over from division) of dividing the larger number by the smaller one.
Hint- You have no guarantee which number will be the bigger number, how can you determine which is which?
Hint- You have no guarantee which number will be the bigger number, how can you determine which is which?
function getRemainder(num1, num2) {
return Math.max(num1, num2) % Math.min(num1, num2)
}
console.log(getRemainder(17, 5)); //=> 2
console.log(getRemainder(20, 5)); //=> 0
console.log(getRemainder(8, 22)); //=> 6
console.log(getRemainder(7, 42)); //=> 0а чем этот вариант не нравится?
p
а чем этот вариант не нравится?
Интересно как еще можно сделать
JB
persona x grata
Интересно как еще можно сделать
Короче вариант не будет.
JB
Короче вариант не будет.
Максим вместо этого сделать if/else или тернарный if/else с той же логикой
p
А этот код как улучшить?
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
function gradeCalculator(grade) {
if (grade >= 90) {return 'A'};
if (grade === 89 || grade >= 80) {return 'B'};
if (grade === 79 || grade >= 70) {return 'C'};
if (grade === 69 || grade >= 60) {return 'D'};
if (grade <= 59) {return 'F'};
}
console.log(gradeCalculator(92)); //=> "A"
console.log(gradeCalculator(84)); //=> "B"
console.log(gradeCalculator(70)); //=> "C"
console.log(gradeCalculator(61)); //=> "D"
console.log(gradeCalculator(43)); //=> "F"p
Почему здесь свитч возвращает undefined?
function gradeCalculator(grade) {
switch (grade) {
case grade >= 90: 'A';
break;
case grade === 89 || grade >= 80: 'B';
break;
default: 'default';
}
}
function gradeCalculator(grade) {
switch (grade) {
case grade >= 90: 'A';
break;
case grade === 89 || grade >= 80: 'B';
break;
default: 'default';
}
}
p
но ифы полегче читаются.
я пробую разные решения одной задачи
я пробую разные решения одной задачи
L
persona x grata
А этот код как улучшить?
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
function gradeCalculator(grade) {
if (grade >= 90) {return 'A'};
if (grade === 89 || grade >= 80) {return 'B'};
if (grade === 79 || grade >= 70) {return 'C'};
if (grade === 69 || grade >= 60) {return 'D'};
if (grade <= 59) {return 'F'};
}
console.log(gradeCalculator(92)); //=> "A"
console.log(gradeCalculator(84)); //=> "B"
console.log(gradeCalculator(70)); //=> "C"
console.log(gradeCalculator(61)); //=> "D"
console.log(gradeCalculator(43)); //=> "F"function gradeCalculator(grade) {
if (grade >= 90) {return 'A'};
if (grade >= 80) {return 'B'};
if (grade >= 70) {return 'C'};
if (grade >= 60) {return 'D'};
if (grade <= 59) {return 'F'};
}L
persona x grata
А этот код как улучшить?
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
..
Create a function gradeCalculator which takes a grade (number) and returns its letter grade.
grades 90 and above should return "A"
grades 80 to 89 should return "B"
grades 70 to 79 should return "C"
grades 60 to 69 should return "D"
59 and below should return "F"
//
function gradeCalculator(grade) {
if (grade >= 90) {return 'A'};
if (grade === 89 || grade >= 80) {return 'B'};
if (grade === 79 || grade >= 70) {return 'C'};
if (grade === 69 || grade >= 60) {return 'D'};
if (grade <= 59) {return 'F'};
}
console.log(gradeCalculator(92)); //=> "A"
console.log(gradeCalculator(84)); //=> "B"
console.log(gradeCalculator(70)); //=> "C"
console.log(gradeCalculator(61)); //=> "D"
console.log(gradeCalculator(43)); //=> "F"const gradeCalculator = (
grade,
gradeMap = [ [90, "A"], [80, "B"], [70, "C"], [60, "D"] ],
defaultGrade = "F"
) =>
gradeMap.find(([lv]) => grade >= lv)?.[1] || defaultGrade