array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Normally numpy forces the left and right side of an assignment to match, so for example if I do a[:] = b , b must be the same shape or broadcast to the same shape as a . But there seems to be an exception to that rule: >>> a = np.arange(10) >>> a array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]) >>> b = a.copy() >>> a[[0,1,2]] = b[::2] >>> a array([0, 2, 4, 3, 4, 5, 6, 7, 8, 9]) >>> a[np.arange(10)] = b[:2] >>> a array([0, 1, 0, 1, 0, 1, 0, 1, 0, 1]) It seems to only work with 1d arrays and only if there is fancy indexing on the left side of the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is there a way to specify getting all but the first element in an array? I generally use foreach() to loop through my arrays. say array(1,2,3,4,5), i would only want 2, 3, 4 ,5 to show and for it to skip 1. 回答1: There are multiple ways of approaching this problem. The first solution is to use a flag boolean to indicate the first element and proceed in your foreach $firstElement = true; foreach($array as $key => $val) { if($firstElement) { $firstElement = false; } else { echo "$key => $val\n"; } } If your elements are naturally numerically

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to convert an array to string in hive. I want to collect_set array values to convert to string without [[""]] . select actor, collect_set(date) as grpdate from actor_table group by actor; so that [["2016-07-01", "2016-07-02"]] would become 2016-07-01, 2016-07-02 回答1: Use concat_ws(string delimiter, array<string>) function to concatenate array: select actor, concat_ws(',',collect_set(date)) as grpdate from actor_table group by actor; If the date field is not string, then convert it to string: concat_ws(',',collect_set(cast(date as

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: is it possible to iteratively fill a twig array with values? {% for question in questions %} {% set multipleChoiceArray = [] %} {% for multipleChoice in question.multipleChoiceAnswers %} {% set multipleChoiceArray = multipleChoiceArray|merge( multipleChoice.answerText ) %} {% endfor %} {% endfor %} the problem is here multipleChoiceArray|merge(multipleChoice.answerText) when i try to pass an array for example with key = loop.index like {% set multipleChoiceArray = multipleChoiceArray|merge({"loop['index']":"multipleChoice['answerText']"}) %}

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is there any difference between new char[n] and new (char[n]) ? I have the second case in a generated code, g++ (4.8.0) gives me ISO C++ does not support variable-length array types [-Wvla] This makes me think if these two are the same or not. new char[n] means "allocate n objects of type char . does new (char[n]) mean "allocate 1 object of type array of n chars "? deleting the first is clear. should I delete the second with delete or delete[] ? are there any other differences I should be aware of? may I safely remove the parentheses and

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am a beginner for AngularJS. I am trying to display "No Tag Found" during filter process with the help of " ng-show ". JS: function simpleController($scope) { $scope.tags = ['HTML','CSS','Jquery','Bootstrap','AngularJS']; } HTML: <div ng-controller="simpleController"> <input class="txt" type="text" ng-model="nameText" /> <div> <ul> <li ng-repeat="myKeys in tags| filter:nameText">{{myKeys}}</li> </ul> <div ng-show="!tags.length">No Tag Found</div> </div> </div> When I type any value other than array vales, I am not able to get "No Tag Found

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have an array: arr = [(1,1,1), (1,1,2), (1,1,3), (1,1,4)...(35,1,22),(35,1,23)] I want to split my array according to the third value in each ordered pair. I want each third value of 1 to be the start of a new array. The results should be: [(1,1,1), (1,1,2),...(1,1,35)][(1,2,1), (1,2,2),...(1,2,46)] and so on. I know numpy.split should do the trick but I'm lost as to how to write the condition for the split. 回答1: I cannot think of any numpy functions or tricks to do this . A simple solution using for loop would be - In [48]: arr = [(1,1,1)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: If I have two different threads via GCD accessing an NSMutableArray and one is merely creating a new array based off the mutable array while the other thread is deleting records from the array, should I expect this to be a problem? That is, shouldn't the copy, which I presume is merely "reading" the array, just get whatever happens to be in the array at that moment? I am not enumerating the array in either thread, but it is still crashing. As soon as I remove the read routine, it works fine. Here is the "read" : dispatch_async(saveQueue, ^{

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a n*m cell array Cell_In: a b * * * * c * * d * * * f * --> represents empty string (''). Here is what I need: a b a b a b c b c d c d c f For a particular column I need to fill the empty cell with the previous non-empty cell until another non-empty cell is found. Following is the code what I wrote. b = ~cellfun(@isempty,a); c = [find(b(:,1) == 1);size(a,1)+1]; e = diff(c); d = [find(b(:,2) == 1);size(a,1)+1]; f = diff(d); s1 = ''; s2 = ''; for i = 1:length(e) s1 = [s1,repmat(a(c(i),1),1,e(i))]; end for i = 1:length(f) s2 = [s2,repmat

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is it possible to filter a Slickgrid without using the DataView? In case it isn't possible, how should the data array be structured in order to display correctly? I don't have a working example atm. Thanks Later edit: After doing some more homework, a filterable datagrid is all about getting matching indexes in a nested array... to get a live sorted result-set that gets updated with grid.setData(filterData);grid render; one should do the following function intersect(a, b) // find an intersection of 2 arrays (google result on SO { var ai=0,