minimum

Requiring at least one element in java variable argument list

由 假如想象 提交于 2019-12-09 02:09:01
问题 In this code construct: public MyClass(Integer... numbers) { do_something_with(numbers[]); } is it possible to require that numbers contains at least one entry in such a way, that this is checked at compile-time? (At run-time, of course, I can just check numbers.length.) Clearly I could do this: public MyClass(Integer number, Integer... more_numbers) { do_something_with(number, more_numbers[]); } but this isn't going to be very elegant. The reason I would like to do this is to make sure that

Algorithm for checking if an Array with n-elements is a minimum heap

由 柔情痞子 提交于 2019-12-08 01:24:18
问题 I'm trying to outline an algorithm to determine if my array is a minimum heap. Is there any documentation out there that could help me with this? I found a function for it on Apache's website, but it doesn't show exactly how the function works; just that there exists a function (BinaryHeap(boolean isMinHeap)). 回答1: The Wikipedia article should help you. Here are some questions to get you thinking about the solution: What must be true about the root of a heap, assuming the heap is a min heap?

given 5 numbers, what is the minimum number of comparisons needed to find the median?

由 六月ゝ 毕业季﹏ 提交于 2019-12-07 21:50:35
问题 how do you setup minimum number of comparisons in general? 回答1: To cite Donald Knuth (by way of Wikipedia, since I don't have my copy of TAOCP at the moment), the lower bound for the number of comparisons is six: http://en.wikipedia.org/wiki/Selection_algorithm (scroll down to the section entitled "Lower Bounds"). Your goal is, effectively, to find the k lowest values where k is half the size of the list, rounded up, (so, k = 3; n = 5) and then take the max of those. Plugging that into the

How to restrict the minimum size of the window for Eclipse e4

由 僤鯓⒐⒋嵵緔 提交于 2019-12-07 18:14:24
问题 I am making an application based on Eclipse e4 framework. I was wondering how the minimal size of the application window can be controlled. There seems no properties can be defined in e4xmi file for this purpose. Does anyone know how to do it? I found a thread in Eclipse Community Forum (http://www.eclipse.org/forums/index.php/t/244875/) saying it can be achieved by creating my own renderer. How can I do that exactly? Thank you very much :) 回答1: Assuming you are using the built-in SWT

Better way to find a minimum value that fits a condition?

由 泪湿孤枕 提交于 2019-12-07 17:21:57
问题 I can't get past the feeling that I am missing something obvious. Is there a clearer or more idiomatic way to do what the following function does? closest.preceding <- function(candidates, limit) { # return the value in candidates that is closest to but less than the limit return(limit - min(limit-candidates[candidates < limit])) } Thanks for any insight. 回答1: You could do: max(candidates[candidates<limit]) Which first filters out just those candidates that are (strictly) less than the limit,

How to get all the minimum elements according to its first element of the inside list in a nested list?

由 白昼怎懂夜的黑 提交于 2019-12-07 16:36:15
问题 Simply put! there is this list say LST = [[12,1],[23,2],[16,3],[12,4],[14,5]] and i want to get all the minimum elements of this list according to its first element of the inside list. So for the above example the answer would be [12,1] and [12,4] . Is there any typical way in python of doing this? Thanking you in advance. 回答1: A compact single-pass solution requires sorting the list -- that's technically O(N log N) for an N -long list, but Python's sort is so good, and so many sequences

Angular ng-repeat filter with greater than

由 天大地大妈咪最大 提交于 2019-12-06 17:01:03
问题 I'm using angular to create a search property form, and I've got a select box with amount of bedrooms, how can I create a greater then filter? (for example: when 2 bedrooms selected, display all properties with 2 bedrooms or more) The select box: <select class="form-control" name="bedrooms" ng-model="Bedrooms" ng-options="property.data.SubType as (property.data.Bedrooms + ' Bedrooms ('+ property.count +')') for property in properties | unique:'Bedrooms' | orderBy:'data.Bedrooms'"> <option

Algorithm for checking if an Array with n-elements is a minimum heap

由 匆匆过客 提交于 2019-12-06 06:03:52
I'm trying to outline an algorithm to determine if my array is a minimum heap. Is there any documentation out there that could help me with this? I found a function for it on Apache's website, but it doesn't show exactly how the function works; just that there exists a function (BinaryHeap(boolean isMinHeap)). The Wikipedia article should help you. Here are some questions to get you thinking about the solution: What must be true about the root of a heap, assuming the heap is a min heap? If the root of the heap satisfies the min heap property, how do you ensure that the subtrees of the root

Get minimum unused value in MySQL column

由 社会主义新天地 提交于 2019-12-06 04:54:38
问题 I have a table with integer ID column. I would like to get the minimum unused value for this column. The query should find the first hole in table IDs and get the minimum value inside it. I'll try to explain it with some examples. Example 1: no-holes table In this case, I have a table without holes and query should simply get the minimum unused value: should get: 4 |id| |1 | |2 | |3 | Example 2: table with hole on top In this case, we have a hole on top (missing value: 1). The query finds the

find max or min in excel, with conditions

由 馋奶兔 提交于 2019-12-06 04:39:16
问题 In my spreadsheet I have a column with negative and positive values. I need to get the minimum among all positive values and the maximum among all negative ones. How can I do so? 回答1: Use array formulas. In the following examples, the values you're checking are in A2:A10 . Maximum negative: =MAX(IF(A2:A10<0,A2:A10)) Press Ctrl + Shift + Enter when entering the formula. Formula will then appear bracketed by {...}. Minimum positive: =MIN(IF(A2:A10>=0,A2:A10)) Also enter as an array formula by
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