numbers

问题 The code successfully crops a large file of many numbers to several smaller text files with number, but it produces an interesting quirk. All numbers should be to four decimal points like 2.7400 but instead they print as 2.74. Here is a snippet from a file 0.96 0.53 0.70 0.53 0.88 0.97 Why does this happen? Is there a way to fix this or this just a quirk of float()? from itertools import islice def number_difference(iterable): return float(iterable[-1].strip('\n')) - float(iterable[0].strip('

问题 I have been futzing about learning bash tonight and I have been trying to create a random number sequence that uses all the numbers of a range and uses each digit just once. So something like inputting the range of 1-5 will output something like 4-3-5-2-1 or 2-5-1-3-4 and so on. I am as stuck as can be on this one. Thanks! 回答1: the following command is not specific to bash, but it worked seq 1 5 | shuf a more bash specific with substrings x=12345 for((i=5;i>0;i--));do ((r=RANDOM%i+1)) echo $

问题 So basically, I have this function that is supposed to generate two random integers between a high and a low number, to make a point on the form. I know that Random can handle this, but Random has consistency, whereas I need the numbers to be completely random on the form. For example, most of my generated points appear in a diagonal line. This is what I want to avoid. It should go all over the form between the high and low numbers. Here is my current function: Function GetNewLocation() As

问题 In DOS/Batch, if 08 lss 1 echo true echoes "true". The same applies to 09. Both 08 and 09 are less than 1. However, if 07 lss 1 echo true does not echo anything. 01 to 07 are not less than 1. Why? What is special about 08 and 09? 回答1: Typically, a leading 0 indicates you'd like the number to be parsed in octal. I'd expect 08 or 09 to actually be an error condition ; perhaps the batch language does not have a good mechanism to signify that the input was incorrect? 回答2: Extending the answers

问题 This could be basic question but I could not find something useful. Question is: How to convert double or int value to Number type ( to be more specific oracle.jbo.domain.Number ) I tried the following: for integer values int i=9; Integer y=new Integer(i); oracle.jbo.domain.Number num=(oracle.jbo.domain.Number)y; for float values double i=9.5; Double y=new Double(i); oracle.jbo.domain.Number num=(oracle.jbo.domain.Number)y; But I always get incompatible types error in both cases: Type 'oracle

问题 I was just curious because 65 is the same as the letter A If this is the wrong stack sorry. 回答1: Short answer. They don't. Longer answer, every binary combination between 00000000 and 11111111 has a character representation in the ASCII character set. 01000001 just happens to be the first capital letter in the Latin alphabet that was designated over 30 years ago. There are other character sets, and code pages that represent different letter, numbers, non-printable and accented letters. It's

问题 the problem is : "Write a function to find out if a number is a prime or perfect number." so far i have worked on the perfect part first and this is what i have: #include <iostream> using namespace std; bool perfectNumber(int); int main() { int number; cout<<"Please enter number:\n"; cin>>number; bool perfectNumber(number); return 0; } bool perfectNumber(int number) { int i; int sum=0; for(i=1;i<=number/2;i++) { if(number%i==0) { sum+=i; } } if (sum==number) return i; else return 0; } HOWEVER

问题 I'll like to format 1000 to 10.00 The PHP number_format function does not seem to be working for this. I have tried: $amount2 = number_format("$cost",2,"",","); echo "$cost"; Any ideas? Is there a way I can manupulate number_format to display the results (i.e just inserting a decimal before the last two digits? 回答1: Number format will change the "." to a "," but you telling it to format ONE THOUSAND. $cost=1000; echo number_format($cost,2,'.',','); //1,000.00 What you want is simply: $cost

问题 If I wanted to make an add method that adds values of two different types like: add[T,S](op1: T, op2: S): ? = ... The most notable example I can think of are the basic number types. If I add a Byte and an Int then it would return an Int. If two Bytes are added it could return an Int depending on if the -127 to 128 limit for the Byte is broken. Further more if I wanted to create classes that had the same characteristics I would like it to do the same. One possible solution is to have classes

问题 Quick question: I am trying to fill in empty spaces with a specific number of zeroes in an NSString stringWithFormat formatting string. For example, I want: @"The number is %d", 5 // I want this to output 'the number is 05' @"the number is %d", 10 // I want this to output 'the number is 10' I know how to do this in Java, but I cant seem to find the same function in objective-c. Any help would be great. 回答1: If in Java you use System.out.printf() , then it's the same format syntax in Objective