sorting

问题 I know how to use radix sort to sort integers. But how to use it to sort strings? or float numbers? 回答1: Radix sort or any other distribution sort may be used to sort floating point numbers if you ignore some peculiarities of them like infinity, not-a-number values and two different representations of zero. IEEE 754-2008 floating point numbers have binary representations, compatible in sorting order with integer numbers. So, if you exclude not-a-numbers and reinterpret float or double as

问题 If I call an xslt template like so: <xsl:template match="hist:Steps"> <dgml:Links> <xsl:apply-templates select="hist:Step"> <xsl:sort data-type="text" select="hist:End" order="ascending"/> </xsl:apply-templates> </dgml:Links> </xsl:template> Will the following-sibling axis in the template below interrogate the document order or the sorted order? <xsl:template match="hist:Step"> <xsl:if test="following-sibling::hist:Step"> <dgml:Link> <xsl:attribute name="Source"> <xsl:value-of select="hist

问题 I want to sort models by day first and then by score, meaning I'd like to see the the highest scoring Articles in each day. class Article(models.Model): date_modified = models.DateTimeField(blank=True, null=True) score = models.DecimalField(max_digits=5, decimal_places=3, blank=True, null=True) This answer Django Datetime Field Query - Order by Time/Hour suggests that I use '__day' with my date_modified as in: Article.objects.filter().order_by('-date_modified__day', '-score') FieldError:

问题 Timestamp format in logs Most log lines contain a timestamp and event description: [When] [What] e.g.: [23/Jul/2013:19:35:11 +0000] Processing started. [23/Jul/2013:19:36:11 +0000] Processed 1000 items. [23/Jul/2013:19:37:11 +0000] Processing finished successfully. I am trying to find a standard timestamp for my log lines. My criteria is: Human readable . I want to easily understand when did the event happen. Alphabetically sortable . When I grep events from a few files and sort them using

问题 Timestamp format in logs Most log lines contain a timestamp and event description: [When] [What] e.g.: [23/Jul/2013:19:35:11 +0000] Processing started. [23/Jul/2013:19:36:11 +0000] Processed 1000 items. [23/Jul/2013:19:37:11 +0000] Processing finished successfully. I am trying to find a standard timestamp for my log lines. My criteria is: Human readable . I want to easily understand when did the event happen. Alphabetically sortable . When I grep events from a few files and sort them using

问题 I have a perl array of to-do tasks that looks like this: @todos = ( "1 (A) Complete online final @evm4700 t:2010-06-02", "3 Write thank-you t:2010-06-10", "4 (B) Clean t:2010-05-30", "5 Donate to LSF t:2010-06-02", "6 (A) t:2010-05-30 Pick up dry cleaning", "2 (C) Call Chris Johnson t:2010-06-01" ); That first number is the task's ID. If a task has ([A-Z]) next to, that defines the task's priority. What I want to do is sort the tasks array in a way that places the prioritized items first (and

问题 I need to sort an array using dates, but the problem is that the first array stores that value in the key added_date while the second one uses the key date_added . How can I sort them according to date (newer elements first)? The array has the following structure: [0] => Array ( [data] => Array ( [0] => Array ( [media] => upcomingEvents_1214_1429325758.jpeg [reference] => upcomingEvents [added_date] => 2015-04-18 08:26:00 [type] => image/jpeg ) [1] => Array ( [media] => upcomingEvents_1214

问题 I have a problem with the auto-complete behaviour of comboboxes in VB.NET (with the .NET framework 2.0). I am using a combobox to type in numeric values, and its DropDown list to suggest possible numeric values. This list is sorted in ascending order, for example {"10","92", "9000", "9001"}. The combobox properties are set as follow: AutoCompleteMode: SuggestAppend AutoCompleteSource: ListItems DropDownStyle: DropDown Sorted: False The DropDown list is simply filled like this: myCombobox

问题 If I have this vector: x = [1 1 1 1 1 2 2 2 3 4 4 6 6 6 6] I would like to get the position of each unique number according to itself. y = [1 2 3 4 5 1 2 3 1 1 2 1 2 3 4] At the moment I'm using: y = sum(triu(x==x.')) % MATLAB 2016b and above It's compact but obviously not memory efficient. For the pure beauty of MATLAB programming I would avoid using a loop. Do you have a better simple implementation ? Context: My final goal is to sort the vector x but with the constraint that a number that

问题 In DataTable I could sorting with dataTable.DefaultView.Sort = "SortField DESC"; I'm getting a DataSet from database, I was wondering could I do a sorting on the DataSet like how I do it in DataTable . 回答1: you can still access the DataTable from the the data set as follows, ds.Tables[0].DefaultView.Sort =" criterian"; Hope this helps. 回答2: DataView view = ds.Tables[0].DefaultView; view.Sort = "SortField DESC"; http://msdn.microsoft.com/en-us/library/1ay5y4w0(v=vs.71).aspx http://social.msdn