How do I convert a long to a byte[] and back in Java? I’m trying convert a long to a byte[] so that I will be able to send the byte[] over a TCP connection. On the other side I want to take that byte[] and convert it back into a double. 16 Answers 16
This question already has answers here: How to convert an int to string in C? (11 answers) Closed 9 years ago. I tried this example: /* itoa example */ #include <stdio.h> #include <stdlib.h> int main () { int i; char buffer [33]; printf (“Enter a number: “); scanf (“%d”,&i); itoa (i,buffer,10); printf (“decimal: %s\n”,buffer); itoa … Read more
I have a dataframe such as: a1 = c(1, 2, 3, 4, 5) a2 = c(6, 7, 8, 9, 10) a3 = c(11, 12, 13, 14, 15) aframe = data.frame(a1, a2, a3) I tried the following to convert one of the columns to a vector, but it doesn’t work: avector <- as.vector(aframe[‘a2’]) class(avector) [1] “data.frame” … Read more
What is the best way to convert a double to a long without casting? For example: double d = 394.000; long l = (new Double(d)).longValue(); System.out.println(“double=” + d + “, long=” + l); 8 Answers 8
Is there a preferred way to keep the data type of a numpy array fixed as int (or int64 or whatever), while still having an element inside listed as numpy.NaN? In particular, I am converting an in-house data structure to a Pandas DataFrame. In our structure, we have integer-type columns that still have NaN’s (but … Read more
I have a list with numeric strings, like so: numbers = [‘1’, ‘5’, ’10’, ‘8’]; I would like to convert every list element to integer, so it would look like this: numbers = [1, 5, 10, 8]; I could do it using a loop, like so: new_numbers = []; for n in numbers: new_numbers.append(int(n)); numbers … Read more
I want to convert a Float to an Int in Swift. Basic casting like this does not work because these types are not primitives, unlike floats and ints in Objective-C var float: Float = 2.2 var integer: Int = float as Float But this produces the following error message: ‘Float’ is not convertible to ‘Int’ … Read more
How can I convert a string to a date time object in javascript by specifying a format string? I am looking for something like: var dateTime = convertToDateTime(“23.11.2009 12:34:56”, “dd.MM.yyyy HH:mm:ss”); 15 Answers 15
How could I convert from float to string or string to float? In my case I need to make the assertion between 2 values string (value that I have got from table) and float value that I have calculated. String valueFromTable = “25”; Float valueCalculated =25.0; I tried from float to string: String sSelectivityRate = … Read more
I wonder what’s the correct way of converting (deserializing) a string to a Python’s Enum class. Seems like getattr(YourEnumType, str) does the job, but I’m not sure if it’s safe enough. Just to be more specific, I would like to convert a ‘debug’string to an Enum object like this: class BuildType(Enum): debug = 200 release … Read more
