string-comparison

问题 I tried to find entries in an Array containing a substring with np.where and an in condition: import numpy as np foo = "aa" bar = np.array(["aaa", "aab", "aca"]) np.where(foo in bar) this only returns an empty Array. Why is that so? And is there a good alternative solution? 回答1: We can use np.core.defchararray.find to find the position of foo string in each element of bar , which would return -1 if not found. Thus, it could be used to detect whether foo is present in each element or not by

问题 Following is the code snippet from a console application - class MyClass { public int GetDay(string data22) { int returnValue = 0; if (string.Compare(data22,"THURSDAY") == 0) // true { returnValue = (int)DayOfWeek.Thursday; } if (data22 == "THURSDAY") //false { returnValue = (int)DayOfWeek.Thursday; } if (string.Equals(data22, "THURSDAY"))//false { returnValue = (int)DayOfWeek.Thursday; } return returnValue; } } class Program { static void Main(string[] args) { string ExecutionDay = "

问题 I wish to compare two strings in javascript. I am using localeCompare method but the output is not as expected 116457 < 3085 false "116457" < "3085" true "116457".localeCompare("3085") -1 Output in second and third case is not as expected. I know it sorts in Lexicographical order but still I am having trouble understanding why is it so and how should I overcome this. Any help would be appreciated. 回答1: If you want to compare them without converting them to numbers, you can set numeric: true

问题 I know that in java there is a compareTo method that you can write in a class that will compare two variables and return a value -1, 1, or 0 signifing greater than, less than, and equal to operations. Is there a way to do this in C++? Background: Im creating a modified string class in which it takes a string and an arraylist. I want to be able to compare the string in a traditional fashion where if its lower in the alphabet it will be less than, than higher it would be greater than. Than i

问题 Consider this code snippet: bool foo(const std::string& s) { return s == "hello"; // comparing against a const char* literal } bool bar(const std::string& s) { return s == "hello"s; // comparing against a std::string literal } At first sight, it looks like comparing against a const char* needs less assembly instructions 1 , as using a string literal will lead to an in-place construction of the std::string . ( EDIT: As pointed out in the answers, I forgot about the fact that effectively s

问题 Consider this code snippet: bool foo(const std::string& s) { return s == "hello"; // comparing against a const char* literal } bool bar(const std::string& s) { return s == "hello"s; // comparing against a std::string literal } At first sight, it looks like comparing against a const char* needs less assembly instructions 1 , as using a string literal will lead to an in-place construction of the std::string . ( EDIT: As pointed out in the answers, I forgot about the fact that effectively s

问题 Consider this code snippet: bool foo(const std::string& s) { return s == "hello"; // comparing against a const char* literal } bool bar(const std::string& s) { return s == "hello"s; // comparing against a std::string literal } At first sight, it looks like comparing against a const char* needs less assembly instructions 1 , as using a string literal will lead to an in-place construction of the std::string . ( EDIT: As pointed out in the answers, I forgot about the fact that effectively s

问题 Is there any solution to have a string comparison function in PHP identical to JavaScript's string.localeCompare() ? My goal is to make a hasher that can be applied over simple objects in PHP and in JS as well. The property ordering can be solved based on this question: Sorting JavaScript Object by property value I make a list of property key and value tuplets and I order the list by the keys. (Note that this can work recursively too.) But I'm a bit afraid of string representations and

问题 Is there any solution to have a string comparison function in PHP identical to JavaScript's string.localeCompare() ? My goal is to make a hasher that can be applied over simple objects in PHP and in JS as well. The property ordering can be solved based on this question: Sorting JavaScript Object by property value I make a list of property key and value tuplets and I order the list by the keys. (Note that this can work recursively too.) But I'm a bit afraid of string representations and

问题 I want to compare 2 strings which have some non English character in them String1 = debarquer String2 = débárquér On comparing above 2 strings, they should say equal. 回答1: Use the Collator class. It allows you to set a strength and locale and it will compare characters appropriately. It should be something similar to this (NOTE: I have not tested the program) import java.text.Collator; import java.util.Locale; public class CollatorExp { public static void main(String[] args) { Collator