range

问题 assigning grade on basis of range: def getGrade(size): grade ='' if size <= 32: grade = 'p4' elif size > 32 and size <=64: grade = 'p6' elif size > 64 and size <= 128: grade = 'p10' elif size > 128 and size <= 256: grade = 'p15' elif size > 256 and size <=512: grade = 'p20' elif size > 512 and size <= 1024: grade = 'p30' elif size > 1024 and size <= 2048: grade = 'p40' ...... Problem is need to add 20 more check so is there any way to do better than this approach. 回答1: Due do the ranges being

问题 I need to validate the length of a string. The allowed values for the character count are: 6 – 9 characters 12 characters 15 characters All strings with a different character count are invalid. Thus, I would like to create a Swift function that accepts a number of ranges and evaluates the string: extension String { func evaluateLength(validCharacterCounts: Range<Int>...) -> Bool { // Implementation } } Now I can call the function for a single Int range: "Live long and prosper".evaluateLength

问题 To access an instance of a User in a restful web-service the url is structured as shown in the curl request below: curl -v -X GET -s "$BASE_URL/User/${customer_id}.json" If I wanted to specify all User entities or page through a range of User entities, such as the first 50 Users in my database, how would I structure my request so that it is compliant with REST ??? 回答1: You should start by trying to de-emphasize the meaning of the characters in a URI. While nice, pretty and readable URIs are a

问题 The docs don't say how, and the tutorial completely ignores for loops. 回答1: As of 1.0, for loops work with values of types with the Iterator trait. The book describes this technique in chapter 3.5 and chapter 13.2. If you are interested in how for loops operate, see the described syntactic sugar here: http://doc.rust-lang.org/std/iter/index.html Example: fn main() { let strs = ["red", "green", "blue"]; for sptr in strs.iter() { println!("{}", sptr); } } (Playground) If you just want to

问题 I'd like to create a range slider that has a div element follow the range thumb. This div element would contain the current value of the range input. How would I go about doing something like this? I've looked into styling the slider but don't know how I could add an actual element onto the thumb. It would look something like this, excuse my terrible drawing abilities: Edit: The following div should update while slider is being dragged. UPDATE: I got a pretty good prototype going but cant

问题 at the moment I have some troubles writing an abstraction layer for Mozilla and Webkit based browsers for using the DOM-range object (getting and processing user selections). I have also tried to have a look at frameworks like Rangy but this seems far to complex for my task (I have no idea where exactly in the code to find the information I need. If someone could give me a hint, I would be grateful!). What I want is simply this: get back the reference to the text node the selection starts in

问题 So, uh, ok. This might get mathematical, so hope you brought your scientific calculator with you ;) This is my problem: Given an initial date (timestamp), time period period (seconds) and today's date (timestamp), I need to find the nearest date which coincides with the period*n plus the original/initial date. So far, I got some stuff working nicely, such as the amount of "periods" between the initial and final(today's) date, which would be "2" in the demo above: $initial=strtotime('2 April

问题 I'd like to know if there is a simple (or already created) way of doing the opposite of this: Generate List of Numbers from Hyphenated.... This link could be used to do: >> list(hyphen_range('1-9,12,15-20,23')) [1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15, 16, 17, 18, 19, 20, 23]: I'm looking to do the opposite (note that 10 and 21 are included so it would be compatible with the range function, where range(1,10)=[1,2,3,4,5,6,7,8,9]): >> list_to_ranges([1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15, 16, 17, 18, 19,

问题 I'm currently working on a pygame game and I need to place objects randomly on the screen, except they cannot be within a designated rectangle. Is there an easy way to do this rather than continuously generating a random pair of coordinates until it's outside of the rectangle? Here's a rough example of what the screen and the rectangle look like. ______________ | __ | | |__| | | | | | |______________| Where the screen size is 1000x800 and the rectangle is [x: 500, y: 250, width: 100, height:

问题 I have a list of decimal numbers as follows: [-23.5, -12.7, -20.6, -11.3, -9.2, -4.5, 2, 8, 11, 15, 17, 21] I need to normalize this list to fit into the range [-5,5] . How can I do it in python? 回答1: To get the range of input is very easy: old_min = min(input) old_range = max(input) - old_min Here's the tricky part. You can multiply by the new range and divide by the old range, but that almost guarantees that the top bucket will only get one value in it. You need to expand your output range