integer

问题 I have been searching long and hard for an answer regarding the processes full-text index uses to index the full text catalogs assigned to a document, where the document primary key is included in the indexing. I have not been able to find the MSDN article that describes this in depth. Why can't I use it for searching int-only strings in the full text search columns? SEE HERE: (WELL, I'm a new user so I remade the columns myself since I can't post an image) ID FIRSTNAME LASTNAME ADDRESS

问题 I apologise if this has already been asked before, but I was unable to find a conclusive answer after some extensive searching, so I thought I would ask here. I am a beginner to Java (to coding, in general) and was tasked with writing a program that takes a user-inputted 3 digit number, and adds those three digits. Note: I cannot use loops for this task, and the three digits must all be inputted at once. String myInput; myInput = JOptionPane.showInputDialog(null,"Hello, and welcome to the

问题 I am getting a variable from $_GET['category'] . This is always supposed to be a integer. So when I set the variable I use: $category=settype($_GET['category'], "int"); // Also tried $category=settype($_GET['category'], "integer"); However, this always returns 1. They are numbers in the query string for example: http://domain.com/example.php?category=57 When I echo $category it always returns 1. No mater what ?category= has behind it for a number. Any help would be appreciated! Thank you! 回答1

问题 I want a math function y = f(x) where x and y are 32 bit integers, such that it is reversible by some function x = g(y) the sequence f(1), f(2), f(3), ... looks random I thought about XOR with some constant key, but that fails to look random. Also I could use DES or AES. But those seem like overkill. Is there something simpler? 回答1: Try a block cipher such as Skip32. But note that this does always encrypt one value to another value, so you need to remember that repetition of the input leads

问题 I'd like to calculate the mathematical logarithm "by hand"... ... where stands for the logarithmBase and stands for the value. Some examples (See Log calculator): The base 2 logarithm of 10 is 3.3219280949 The base 5 logarithm of 15 is 1.6826061945 ... Hoever - I do not want to use a already implemented function call like Math.ceil, Math.log, Math.abs, ... , because I want a clean native solution that just deals with +-*/ and some loops. This is the code I got so far: function myLog(base, x)

问题 I have a list of 185 data frames called WaFramesNumeric . Each dataframe has several hundred columns and thousands of rows. I want to edit every data frame, so that it leaves all numeric columns as well as any non-numeric columns that I specify. Using: for(i in seq_along(WaFramesNumeric)) { WaFramesNumeric[[i]] <- WaFramesNumeric[[i]][,sapply(WaFramesNumeric[[i]],is.numeric)] } successfully makes each dataframe contain only its numeric columns. I've tried to amend this with lines to add

问题 I have a list of 185 data frames called WaFramesNumeric . Each dataframe has several hundred columns and thousands of rows. I want to edit every data frame, so that it leaves all numeric columns as well as any non-numeric columns that I specify. Using: for(i in seq_along(WaFramesNumeric)) { WaFramesNumeric[[i]] <- WaFramesNumeric[[i]][,sapply(WaFramesNumeric[[i]],is.numeric)] } successfully makes each dataframe contain only its numeric columns. I've tried to amend this with lines to add

问题 Swift offers so called "Overflow Operators" &*, *+, &- for integer arithmetics (Swift Advanced Operators). They are designed to truncate the number of available bits when performing an operation that would lead to an overflow. For example: var unsignedOverflow = UInt8.max // --> 255 unsignedOverflow = unsignedOverflow &+ 1 // --> 0, instead of overflow Since Java doesn't support unsigned integers, there is probably not a real equivalent. In Java 8, there are functions like Integer

问题 How is an integer converted to a string in objective c and how is each character of the string reached? The equivalent to the java charAt() method. 回答1: NSString *myString = [NSString stringWithFormat:@"%i", 36]; [myString characterAtIndex:0]; //"3" [myString characterAtIndex:1]; //"6" Update : Note that characterAtIndex returns a unichar not a c char. Thanks @Chuck. 来源： https://stackoverflow.com/questions/4541616/convert-integer-to-string-and-use-each-character

问题 Is it possible to make Jackson FasterXML library to serialize a given sequence of Integer values as an array of Hex values? That is, simply put, I would like that the code: public class SampleJson { private final ObjectMapper mapper = new ObjectMapper(); JsonNode toJson(int[] values) { ArrayNode jsonArray = mapper.createArrayNode(); for(int i: values) jsonArray.add(i); return jsonArray; } String toJsonString(JsonNode node) throws JsonProcessingException { return mapper.writeValueAsString(node