range

问题 I have objects of different types derived from a single super-type. I wonder if there are any disadvantages in using std::initializer list in a range for loop like this: for(auto object: std::initializer_list<Object *>{object1, object2, object3}) { } Is it completely OK and efficient or would it be better to use an array? To me the std::array solution seems to be more restrictive for the compiler and there is a disadvantage of explicitly stating the size: for(auto object: std::array<Object*,

问题 If I have two ranges that overlap: x = 1..10 y = 5..15 When I say: puts x.include? y the output is: false because the two ranges only overlap partially. But if I want it to be "true" when there is partial overlap between two ranges, how would I write that? In other words I need a way to know when one range contains a subset of another range. I assume there's an elegant way to write this in Ruby but the only solutions I can think of are verbose. 回答1: Be careful using this with large ranges but

问题 I am designing a web application for iPad which makes use of HTML5 in mobile safari. I am transmitting the file manually through an ASP.NET .ashx file hosted on IIS 7 running .NET Framework v2.0. The essential code looks partly like this: // If we receive range header only transmit partial file if (context.Request.Headers["Range"] != null) { var fi = new FileInfo(filePath); long fileSize = fi.Length; // Read start/end index string headerRange = context.Request.Headers["Range"].Replace("bytes=

问题 Hey having a little trouble jquery and the hmtl5 range. I'm try to get the values as they changed but the event listener is not capturing it. Currently my code is: HTML html += '<li>Apply Credits: <input type="range" min="0" max="'+credits+'" name="discount_credits" id="discount_credits" /> <span>'+credits+'</span></li>' And the JS is: $('#discount_credits').mousewheel( function() { alert('it changed!'); alert('new value = ' + $(this).val()); }); I've also tried $('#discount_credits').change(

问题 Let an array: a =np.array([[1,2],[3,-5],[6,-15],[10,7]]) to get lines with elements of the second column above -6 it' s possible to do >>> a[a[:,1]>-6] array([[ 1, 2], [ 3, -5], [10, 7]]) but how to get lines with the second element between -6;3? I tried: >>> a[3>a[:,1]>-6] and also (which raises an error): >>> np.ma.masked_inside(a,-6,3) which gives: masked_array(data = [[-- --] [-- --] [6 -15] [10 7]], mask = [[ True True] [ True True] [False False] [False False]], fill_value = 999999) but

问题 I have a list of randomly ordered unique closed-end ranges R 0 ...R n-1 where R i = [r1 i , r2 i ] (r1 i <= r2 i ) Subsequently some of the ranges overlap (partially or completely) and hence require merging. My question is, what are the best-of-breed algorithms or techniques used for merging such ranges. Examples of such algorithms or links to libraries that perform such a merging operation would be great. 回答1: What you need to do is: Sort items lexicographically where range key is [r_start,r

问题 I'm using this code: set /a alg=!random!*!activecount!/32768+1 For the most part, it works. HOWEVER, the !random! variable isn't generating a completely random number. instead, it's constantly counting up at a slow pace. Now, assuming the variable !activecount! is equal to 2, it would constantly generate either 1 or 2, without changing, for a VERY long time. Why isn't the random variable randomizing? I tried echoing !random! after the fact, and it generates a random number then. What gives?

问题 >>> k = 8 >>> for i in range(k): print i k -= 3 print k Above the is the code which prints numbers from 0-7 if I use just print i in the for loop. I want to understand the above code how it is working, and is there any way we can update the value of variable used in range(variable) so it iterates differently. Also why it always iterates up to the initial k value, why the value doesn't updated. I know it's a silly question, but all ideas and comments are welcome. 回答1: You can't change the

问题 I have been trying to place two timestamps on a row corresponding to two different cell ranges on that row. I have been successfully using this script to timestamp any changes on the row (after the 5th column). What I would like is to place a timestamp in column E if any change happen in cell ranges F to L, and then, another timestamp in column M, if any other changes are made from column N to Z: function onEdit(e) { if (e.range.columnStart < 6 || e.range.rowStart < 2) return; e.source

问题 This is my first post so please "Go" easy on me. :) ... I am quite familiar with many traditional programming languages but I am new to Go and having trouble understanding the use of slices and ranges. The program code and comments below illustrate my consternation. Thank you! package main import ( "fmt" "time" ) type myStruct struct { Name string Count int } Wrote my own Mod function because I could not find on in the Go libraries. func modMe(mod int, value int) int { var m int var ret int m