digits

问题 How can we find the number of numbers less than a given number with no repeating digits in it? For example the number of such numbers less than 100 is 90. (11, 22, 33,44, 55,66,77,88,99 have repeating digits so are excluded). Similarly for less than 1000, digits like 101, 110, 122, 202 etc have to be excluded. 回答1: Here is a way to make it quicker. Notice that there is a correlation between the number of digits in the max number and the solution (number of numbers which I will call NON ) 100

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Is JavaScript’s Math broken? I'm using Math.round to round the number and for some reason it adds weird number of 0s at the end which should not be there. Here is my code: return Math.round($digit * 1000) / 1000; i want numbers to have 3 decimal points example: Math.round(29.469 * 1000) / 1000 = returns this value: 29.469000000000023 cant seem to figure out why. is there a different way of rounding decimals to

问题 So I have to strings s1 and s2 and I have two obtain the string d that contains the maximum numbers for each of the positions of s1 and s2. For example: S1: 1, 3, 6, 2, 3, 10 S2: 6, 3, 11, 1, 2, 5 D: 6, 3, 11, 2, 3, 10 So this is the code bits 32 global start extern exit,printf import exit msvcrt.dll import printf msvcrt.dll segment data use32 class=data format db "%s",0 s1 db "1","3","6","2","3","10" l equ $-s1 s2 db "6","3" ,"11","1","2", "5" d times l db 0 segment code use32 class=code

问题 Hi, I want to know how many number of digits are allowed after decimal point for primitive double datatype in java, without actually getting rounded off. 回答1: It depends on the number; read up on floating point representations for more information. Use the BigDecimal class for fixed-scale arithmetic. 回答2: Taken literally, the number is 0. Most decimal fractions with at least one digit after the decimal point get rounded on conversion to double. For example, the decimal fraction 0.1 is rounded

问题 I am trying to run .py script in Java, but when I run the java code it doesn't show any output. What I am doing wrong? I tried with: ArrayList<String> command = new ArrayList<String>(); //xterm will be launched, if platform is Linux. command.add("xterm"); command.add("-c"); command.add("python"); command.add("/home/clef/Escritorio/use_archive.py"); command.add("/home/clef/classification/STOP_WORDS.tar.gz"); command.add("/home/clef/Escritorio/Prueba_linea/000006/6.jpg"); command.add(" > ~

问题 The below code is used to count number of digit in a given decimal. The problem is that it doesn't count digits more than 10. int NumDigits(int n) { int digits = 0; if (n <= 0) { n = -n; ++digits; } while (n) { n /= 10; ++digits; } return digits; } 回答1: It seems like your toolchain has a 32-bit int type. The maximum value representable in such a type is 2 31 -1 , or 2,147,483,647. As you can see, that's a 10-digit number. You'll need to use a different type that supports larger numbers if you

问题 I have to add trailing zeros to a decimal value. Not only for displaying (so Format is not an option), but in the actual underlying data, because the decimal precision is important in our application. I tried: decimal value = 1M decimal withPrecision = value + 0.000M; Which works well in many cases ... strangely not in all. I debugged into a case where the value in withPrecision was still 1M, by not seeing any difference in the value at runtime and the same hardcoded value in the immediate

问题 I have the data: transaction <- c(1,2,3); date <- c("2010-01-31","2010-02-28","2010-03-31"); type <- c("debit", "debit", "credit"); amount <- c(-500, -1000.97, 12500.81); oldbalance <- c(5000, 4500, 17000.81) evolution <- data.frame(transaction, date, type, amount, oldbalance, row.names=transaction, stringsAsFactors=FALSE); evolution$date <- as.Date(evolution$date, "%Y-%m-%d"); evolution <- transform(evolution, newbalance = oldbalance + amount); evolution If I want to create a table with the

问题 I saw someone not set the length in a tutorial but it was specifically for counting the total number of users and just set to auto-increment. I've been of the habit of always specifying a length because I thought it was mandatory, but I wanted to ask if I can leave it blank unless it specifically a date or pin number etc where the length is always set. (I used to set it as 11 digits or more if I wasn't sure) 回答1: Every integer field defaults to 11 when left blank so you can leave it. 回答2: No,

问题 I saw someone not set the length in a tutorial but it was specifically for counting the total number of users and just set to auto-increment. I've been of the habit of always specifying a length because I thought it was mandatory, but I wanted to ask if I can leave it blank unless it specifically a date or pin number etc where the length is always set. (I used to set it as 11 digits or more if I wasn't sure) 回答1: Every integer field defaults to 11 when left blank so you can leave it. 回答2: No,