# How do you sort vectors by vectors?

## How do you sort vectors by vectors?

For example, you could use a lambda function: std::vector vec; // Fill it std::sort(vec. begin(), vec. end(), [](const std::vector& a, const std::vector& b) { return a[2] < b[2]; });

## Can you sort vectors?

Sorting a vector in C++ can be done by using std::sort(). ... To get a stable sort std::stable_sort is used. It is exactly like sort() but maintains the relative order of equal elements. Quicksort(), mergesort() can also be used, as per requirement.

## How do you sort a vector string?

sort a vector of strings according to their length c++” Code Answer

1. std::vector v;
2. std::sort(v. begin(), v. end(), []
3. (const std::string& first, const std::string& second){
4. return first. size() < second. size();

## What are the types of sorting?

Types of Sorting Algorithms:

• Quick Sort.
• Bubble Sort.
• Merge Sort.
• Insertion Sort.
• Selection Sort.
• Heap Sort.
• Bucket Sort.

## What is internal and external sorting techniques?

Internal sorting: If the input data is such that it can be adjusted in the main memory at once, it is called internal sorting. External sorting: If the input data is such that it cannot be adjusted in the memory entirely at once, it needs to be stored in a hard disk, floppy disk, or any other storage device.

## How many types of sorting are there in C?

Types of Sorting in C

• Bubble Sort. Bubble sort may be defined as the sorting algorithm that follows the approach of replacing the value in the first index with the smallest value in the array and keep it repeating until the list is sorted. ...
• Selection Sort. ...
• Quick Sort. ...
• Merge Sort. ...
• Heapsort. ...
• Insertion Sort.

## What is array in C?

An array is defined as the collection of similar type of data items stored at contiguous memory locations. Arrays are the derived data type in C programming language which can store the primitive type of data such as int, char, double, float, etc.

## What is sorting array in C?

This is a C Program to sort an array in ascending order. This program will implement a one-dimentional array of some fixed size, filled with some random numbers, then will sort all the filled elements of the array. ... The array elements are in unsorted fashion, to sort them, make a nested loop.

Yes

## Where is bubble sort used?

In computer graphics bubble sort is popular for its capability to detect a very small error (like swap of just two elements) in almost-sorted arrays and fix it with just linear complexity (2n).

## What is the best time complexity for bubble sort?

Note: O ( n ) O(n) O(n) is the best-case running time for bubble sort. It is possible to modify bubble sort to keep track of the number of swaps it performs. If an array is already in sorted order, and bubble sort makes no swaps, the algorithm can terminate after one pass.

## What is the best time complexity?

Sorting algorithms
AlgorithmData structureTime complexity:Best
Merge sortArrayO(n log(n))
Heap sortArrayO(n log(n))
Smooth sortArrayO(n)
Bubble sortArrayO(n)