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: I have seen many PHP function on how to generate a <ul><li> tag but my array input is quite complicated I guess. It is an array returned from a custom function called xml2assoc My question is how can I convert the returned xml2assoc array result to a <ul><li> formatted HTML code using PHP. Thanks. $tree = array( 0 => array( 'tag' => 'NavigationMode', 'value' => array( 0 => array( 'tag' => 'Title', 'value' => 'Introduction' ), 1 => array( 'tag' => 'NavigationNode', 'value' => array( 0 => array( 'tag' => 'Title', 'value' => 'Sub Intro' ) ) ) )

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 two models. Teacher and Subject joined by HABTM defined both ways. A teacher can teach many subjects and a subject can be taught by many teachers.my join table is subjects_teachers and have fields id,teacher_id and subject_id. Fetching Teacher data from its model, i expect all teachers and their respective subjects , Fetching Subject data from its model i expect to also see the teachers teaching that particular subject problem on both instances, the associated model returns the correct number of records but the data is absent. i see

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: This question already has an answer here: Fast replacement of values in a numpy array 10 answers I have a numpy array, which has hundreds of elements which are capital letters, in no particular order import numpy as np abc_array = np.array(['B', 'D', 'A', 'F', 'H', 'I', 'Z', 'J', ...]) Each element in this numpy.ndarray is a numpy.string_ . I also have a "translation dictionary", with key/value pairs such that the capital letter corresponds to a city transdict = {'A': 'Adelaide', 'B': 'Bombay', 'C': 'Cologne',...} There are only 26 pairs in

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: Similar to this , I am curious how to remove specific elements from every numpy array in a numpy array. My data is given in form of X below. I think this should work: X = [[x1 x2 ... xn] [x1 x2 ... xn] ... [x1 x2 ... xn]] X.shape (n,|x|) Y=numpy.delete(X[:],1) I would think that Y should now be: Y = [[x1 x3 ... xn] [x1 x3 ... xn] ... [x1 x3 ... xn]] where Y.shape should equal (n-1,|y|=|x|), but it is not . What am I failing to grasp? My intention is to be able to remove all x2's (low correlation variable) in every array in X in order to send

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: What would be a good way to generate 7 unique random numbers between 1 and 10. I can't have any duplicates. I could write a chunk of PHP to do this (using rand() and pushing used numbers onto an array) but there must be a quick way to do it. any advice would be great. 回答1: Simple one-liner: print_r(array_rand(array_fill(1, 10, true), 7)); 回答2: Create an array from 1 to 10 ( range ). Put it in random order ( shuffle ). Select 7 items from the array ( array_slice ) 回答3: Populate an array with ten elements (the numbers one through ten), shuffle

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: Dim arr() As String = {"one","two","three"} I want a new array, sub , containing {"one", "three"} only. What is the best method to do this? 回答1: For this particular case, the simplest option is just to list the two items you want to copy: Dim sub = {arr(0), arr(2)} In the general case, if you want to take the first item, skip one item, and then take all the rest, an easy option would be to use the LINQ extension methods: Dim sub = arr.Take(1).Concat(arr.Skip(2)).ToArray() It yields {"one"} ( arr.Take(1) ) concatenated with ( Concat )

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: Inspired by this post , I googled the worst case of heapsort and found this question on cs.stackexchange.com, but the only answer didn't really answer the question, so I decided to dig it out myself. After hours of reasoning and coding, I've solved it. and I think this question belongs better in SO, so I post it up here. The problem is to find a heapified array containing different numbers from 1 to n, such that when converting it to a sorted array, the total number of exchanges in all sifting operations is maximal possible. 回答1: Of course

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: My need is simple. I would like to delay calls to sendEmail by 100 milliseconds. The email service provider permits at most sending 10 emails per second. Note, however, though .map is synchronous, it immediately returns a Promise . I have tried setTimeout to no avail, such as setTimeout(() => resolve(x), 100) and setTimeout(() => {return new Promise....}, 100) . Thoughts? const promises = userEmailArray.map((userEmail) => { return new Promise((resolve, reject) => { .... mailer.sendEmail(userEmail); return resolve(); }); }); }); ... Promise

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 still coding a fingerprint image preprocessor on Python. I see in MATLAB there is a special function to remove H breaks and spurs: bwmorph(a , 'hbreak') bwmorph(a , 'spur') I have searched scikit, OpenCV and others but couldn't find an equivalent for these two use of bwmorph . Can anybody point me to right direction or do i have to implement my own? 回答1: You will have to implement those on your own since they aren't present in OpenCV or skimage as far as I know. However, it should be straightforward to check MATLAB's code on how it

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: There are no NaNs in my dataset, I have checked thoroughly. Any reason why I keep getting this error when trying to fit my classifier? Some of the numbers in the data set are rather large and some decimal places go out 10 decimal points but I wouldn't thing that should cause an error. I included some of my pandas DataFrame info below as well as the error itself. Any ideas? <class 'pandas.core.frame.DataFrame'> DatetimeIndex: 6244 entries, 1985-02-06 00:00:00 to 2009-11-05 00:00:00 Data columns (total 86 columns): dtypes: float64(86) clf =