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Exercises/2-for-of.js
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| // to calculate sum of all given arguments | ||
| // For example sum(1, 2, 3) should return 6 | ||
| let sum = 0; | ||
| for (const i of args) sum += i; |
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i is not a good naming for array element, it means index in array but here is i isn't an index
Exercises/4-do-while.js
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| } | ||
| while (i < args.length); |
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Better put it in a single line: } while (i < args.length);
Exercises/4-do-while.js
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| // For example sum(1, 2, 3) should return 6 | ||
| if (args.length < 1) return 0; | ||
| let sum = 0; | ||
| let i = 0; |
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Having counter and not using pop/shift is much better for performance 👍
Exercises/6-matrix.js
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| for (let i = 0; i < matrix.length; i++) { | ||
| for (let j = 0; j < matrix[i].length; j++) { | ||
| //max = max < matrix[i][j] ? matrix[i][j] : max; | ||
| if (max < matrix[i][j]) max = matrix[i][j]; |
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Expression matrix[i][j] repeated twice, and we have additional matrix[i] in line 6. See my solution to optimize code.
Exercises/6-matrix.js
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| // Use nested for loop to find max value in 2d matrix | ||
| // For example max([[1, 2, 3], [4, 5, 6], [7, 8, 9]]) | ||
| // should return 9 | ||
| let max = 0; |
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You can name variable as a function but it will be better to use different name.
Exercises/7-ages.js
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| // } | ||
| const ages = {}; | ||
| for (const element in persons) { | ||
| ages[element] = persons[element]['died'] - persons[element]['born']; |
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Suggested change
| ages[element] = persons[element]['died'] - persons[element]['born']; | |
| const person = persons[element]; | |
| ages[element] = person.died - persons.born; |
Exercises/7-ages.js
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| // gandhi: 79, | ||
| // hirohito: 88, | ||
| // } | ||
| const ages = {}; |
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Use different variable name
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