Found a total of 10000 related content
Are null and empty string equivalent in Oracle?
Article Introduction：In Oracle, NULL and empty string are not equal. NULL represents an unknown value and is not equal to any value; an empty string is a string of length 0 that can be equal to other empty strings. The difference between NULL and the empty string is that NULL cannot be used in arithmetic operations or concatenation operations, while the empty string can.
2024-05-03
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544
has a character equal to the sum of the frequencies of other characters in the given string
Article Introduction：Introduction A C++ string is a stream of alphanumeric characters. Strings have the following properties - A string consists of a fixed set of characters String position Default starts from 0th index The frequency of any character is the number of times it appears in the string. The frequency of any character can range from 0 (if it does not occur) to the length of the string. In this article, we will develop a code that takes a string as input and checks if the frequency of any character is equal to the sum of the frequencies of all other characters in the string. Let us look at the following example to better understand this topic Example Example 1 - str - "@!ab@!" Output - True For example, the following example string also contains special characters, where the corresponding frequency of each character is as follows - @=4! =2a=1b=1 cause
2023-09-11
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580
The lexicographically largest string whose sum of characters equals N
Article Introduction：Problem Statement We are given a positive integer num. We need to find a string consisting of lowercase letters such that the sum of all characters in the string is equal to num, and the string is the largest in lexicographic order. Here, ‘a’=1, ‘b’=2, ‘c’=3, ‘d’=4,…, ‘z’=26. We need to use "z" character at the beginning of the string to create the largest dictionary string. Finally, we need to use the last character based on the num%26 value. Example input num=30 and output ‘zd’ Explanation’s Chinese translation is: Explanation ‘zd’ is the largest lexicographic string with a character sum of 30 (z=26+d=4). Input 3 output ‘c’ Explanation
2023-09-17
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1394
How to determine string equality in Golang?
Article Introduction：How to determine string equality in Golang? In Golang, determining whether two strings are equal is a common operation. In this article, we will introduce several commonly used methods to determine whether two strings are equal and give corresponding code examples. Method 1: Use the == operator The simplest way is to use the == operator to determine whether two strings are equal. An example is as follows: packagemainimport "fmt"func
2024-03-13
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1054
Java String Equals
Article Introduction：This is a guide to Java String Equals. Here we discuss how does Java String Equals work and the examples along with the sample code.
2024-08-30
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663
Checks whether a string can form a palindrome string by swapping character pairs at indices with unequal characters in a binary string
Article Introduction：Problem Statement We have a string str and a binary string B. The length of both strings is equal to N. We need to check if we can make string str a palindrome string by swapping its characters multiple times on any pair of indexes containing unequal characters in string B. Example Example Input str=‘AAS’ B=‘101’ Output ‘YES’ The Chinese translation of Explanation is: Explanation We can exchange str[1] and str[2] because B[1] and B[2] are not equal. The final string can be 'ASA'. Input str=‘AASS’ B=‘1111’ and output ‘No’. The Chinese translation of Explanation is: Explanation that we cannot make the string palindrome,
2023-09-02
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1198
The length of the longest substring that needs to be removed to make one string equal to another string
Article Introduction：In this article, we will discuss the problem of finding the length of the longest substring that needs to be removed to make one string equal to another. We will first understand the problem statement and then explore simple and efficient ways to solve the problem, along with their respective algorithmic and time complexities. Finally, we will implement the solution in C++. Problem Statement Given two strings A and B, determine the length of the longest substring that needs to be removed from string A to make it equal to string B. The naive approach The simplest way is to generate all possible substrings of string A, remove them one by one, and then check if the resulting string is equal to string B. If it is, we store the length of the removed substring. Finally, we will return all removed substrings in
2023-09-16
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821
How to determine whether two strings are equal in php
Article Introduction：Methods to determine string equality in PHP include: 1. Strict equality operator (===) compares content and type; 2. Loose equality operator (==) compares content and tolerates type differences; 3. strcmp() function Character comparison returns an integer representation of the result; 4. The mb_strcmp() function supports multi-byte string comparison; 5. The hash_equals() function safely compares hash strings.
2024-04-29
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443
Python program to divide a string into N equal length parts
Article Introduction：In Python, you can use the slicing method to divide a string into N equal parts. Substrings of equal length can be extracted by specifying the starting and ending indices of the substring. In this article, we will see how to split a string into N equal parts using Python slicing method. To split a string into N equal parts, we need to create a function that takes as input the original string and the number of parts to split the string into and returns the result as N equal strings. If the string contains some extra characters that cannot be assigned to N equal parts, they are added to the last substring. The Chinese translation of Example1 is: Example 1 In the example code below, we create a div named
2023-08-24
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1331
Checks whether all characters in a string can be made equal by increasing or decreasing
Article Introduction：In this problem, we need to check if we can make all characters of a string equal by increasing and decreasing operations. We can get the weight of each character based on its ASCII value and check if the total weight can be used to make all characters equal. Problem Statement – We are given a string str of length N containing lowercase alphabetic characters. We need to check if we can make all characters in the string equal by selecting either of the two characters, increasing one character, and then decrementing the other character by 1. Prints "yes" if possible, otherwise prints "no". Example Example Input –str=‘aedb Output –str=‘aedb Explanation – ‘a’ can be increased by 2 and ‘e’ can be decreased by 2. At the same time, ‘b’
2023-09-11
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878
Minimize the number of rearrangements of characters that make all given strings equal
Article Introduction：The goal here is to determine if it is possible to make all strings identical given an arbitrary number of operations on a string array Str of size n. Any element can be taken out of a string and put back anywhere in the same or another string, all in one action. Returns "Yes" if the strings can be made equal, "No" otherwise, giving the minimum number of operations required. Problem Statement Implement a program to minimize the number of times the characters are rearranged so that all given strings are equal Example Example 1 LetustaketheInput:n=3,Theinputarray,Str={mmm,nnn,oo
2023-08-31
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893
