Is there a way to convert an integer to a string in PHP? 16 s 16 You can use the strval() function to convert a number to a string. From a maintenance perspective its obvious what you are trying to do rather than some of the other more esoteric answers. Of course, it depends on … Read more
I’m trying to work out how to cast an Int into a String in Swift. I figure out a workaround, using NSNumber but I’d love to figure out how to do it all in Swift. let x : Int = 45 let xNSNumber = x as NSNumber let xString : String = xNSNumber.stringValue 23 s … Read more
When I convert a factor to a numeric or integer, I get the underlying level codes, not the values as numbers. f <- factor(sample(runif(5), 20, replace = TRUE)) ## [1] 0.0248644019011408 0.0248644019011408 0.179684827337041 ## [4] 0.0284090070053935 0.363644931698218 0.363644931698218 ## [7] 0.179684827337041 0.249704354675487 0.249704354675487 ## [10] 0.0248644019011408 0.249704354675487 0.0284090070053935 ## [13] 0.179684827337041 0.0248644019011408 0.179684827337041 ## [16] … Read more
Consider the following code: void Handler(object o, EventArgs e) { // I swear o is a string string s = (string)o; // 1 //-OR- string s = o as string; // 2 // -OR- string s = o.ToString(); // 3 } What is the difference between the three types of casting (okay, the 3rd one … Read more
I want to convert these types of values, ‘3’, ‘2.34’, ‘0.234343’, etc. to a number. In JavaScript we can use Number(), but is there any similar method available in PHP? Input Output ‘2’ 2 ‘2.34’ 2.34 ‘0.3454545’ 0.3454545 33 s 33
I want to convert a table, represented as a list of lists, into a pandas DataFrame. As an extremely simplified example: a = [[‘a’, ‘1.2’, ‘4.2’], [‘b’, ’70’, ‘0.03’], [‘x’, ‘5’, ‘0’]] df = pd.DataFrame(a) What is the best way to convert the columns to the appropriate types, in this case columns 2 and 3 … Read more
This question already has answers here: When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used? (9 answers) Closed 7 years ago. I’ve been writing C and C++ code for almost twenty years, but there’s one aspect of these languages that I’ve never really understood. I’ve obviously used regular casts i.e. MyClass *m = (MyClass *)ptr; … Read more
I have a class called Questions (plural). In this class there is an enum called Question (singular) which looks like this. public enum Question { Role = 2, ProjectFunding = 3, TotalEmployee = 4, NumberOfServers = 5, TopBusinessConcern = 6 } In the Questions class I have a get(int foo) function that returns a Questions … Read more
In this question, someone suggested in a comment that I should not cast the result of malloc. i.e., I should do this: int *sieve = malloc(sizeof(*sieve) * length); rather than: int *sieve = (int *) malloc(sizeof(*sieve) * length); Why would this be the case? 2 29 TL;DR int *sieve = (int *) malloc(sizeof(int) * length); … Read more
What are the proper uses of: static_cast dynamic_cast const_cast reinterpret_cast C-style cast (type)value Function-style cast type(value) How does one decide which to use in which specific cases? 9 static_cast is the first cast you should attempt to use. It does things like implicit conversions between types (such as int to float, or pointer to void*), … Read more
