Detailed explanation of sort function usage

The sort function is a sorting algorithm commonly used in programming. It is used to sort the elements in a sequence or list in a certain order. The usage of the sort function varies by programming language. The following introduces the usage of the sort function in several common programming languages:

The sort function in Python:

Python The sort function in is the built-in sorted function, which can sort lists or tuples. The usage of the sorted function is as follows:

sorted(iterable, key=None, reverse=False)

Parameter description:

iterable: the sequence or list that needs to be sorted.

key: Optional parameter, used to specify the sorting keyword. If the key parameter is not specified, the elements will be sorted by themselves by default.

reverse: Optional parameter, used to specify the sorting order. If reverse is True, the sorting result is in descending order; if reverse is False (default), the sorting result is in ascending order.

Example:

# 对列表进行升序排序 l = [3, 1, 4, 1, 5, 9] sorted_l = sorted(l) print(sorted_l) # 输出：[1, 1, 3, 4, 5, 9] # 对列表进行降序排序 l = [3, 1, 4, 1, 5, 9] sorted_l = sorted(l, reverse=True) print(sorted_l) # 输出：[9, 5, 4, 3, 1, 1] # 对元组进行排序，按照元组的第二个元素进行升序排序 t = [(1, 3), (1, 1), (2, 2), (3, 1)] sorted_t = sorted(t, key=lambda x: x[1]) print(sorted_t) # 输出：[(1, 1), (1, 3), (3, 1), (2, 2)]

Sort function in JavaScript:

The sort function in JavaScript can sort an array. The usage of the sort function is as follows:

array.sort(compareFunction)

Parameter description:

array: the array to be sorted.

compareFunction: Optional parameter, used to specify the sorting rules. If the compareFunction parameter is not specified, it defaults to the Unicode string Code point order is sorted.

Example:

// 对数组进行升序排序 var arr = [5, 2, 8, 1, 3]; arr.sort(); console.log(arr); // 输出：[1, 2, 3, 5, 8] // 对数组进行降序排序 var arr = [5, 2, 8, 1, 3]; arr.sort(function(a, b) { return b - a; }); console.log(arr); // 输出：[8, 5, 3, 2, 1] // 对数组进行排序，按照数组的第二个元素进行升序排序 var arr = [(1, 3), (1, 1), (2, 2), (3, 1)]; arr.sort(function(a, b) { return a[1] - b[1]; }); console.log(arr); // 输出：[(1, 1), (1, 3), (3, 1), (2, 2)]

The sort function in C:

The sort function in C can sort vectors. The usage of sort function is as follows:

#include #include // 对 vector 进行升序排序 std::vector vec = {5, 2, 8, 1, 3}; std::sort(vec.begin(), vec.end()); for (int i : vec) { std::cout << i << ' '; } // 输出：1 2 3 5 8 // 对 vector 进行降序排序 std::vector vec = {5, 2, 8, 1, 3}; std

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