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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: Hi I am writing a program that counts the number of times each word occurs in a file. Then it prints a list of words with counts between 800 and 1000, sorted in the order of count. I am stuck on keeping a counter to see if the first word matches the next until a new word appears. In the main I am trying to open the file, read each word by word and call sort in the while loop to sort the vector. Then, in the for loop go through all the words and if the first word equals the second count++. I don't think that is how you keep a counter. Here is

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: update 2: hi, sorry I forgot to mention about the api call in my question earlier I making an api call in redux way. so in my actions/index.js file I am calling my api in getSports method. but the problem is when I try to retrieve the values I am getting an error. A cross-origin error was thrown. React doesn't have access to the actual error object in development. See b.me/react-crossorigin-error for more information. so I debugged the props in the class AsyncValidationForm console.log("AsyncValidationForm this.props---->", this.props);

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 using Ruby 1.9.2, Rails 3.0.4/3.0.5 and Phusion Passenger 3.0.3/3.0.4. My templates are written in HAML and I am using the MySQL2 gem. I have a controller action that when passed a parameter that has a special character, like an umlaut, gives me the following error: ActionView::Template::Error (incompatible character encodings: UTF-8 and ASCII-8BIT) The error points to the first line of my HAML template, which has the following code on it: My understanding is that this is caused because I have a UTF-8 string that is being concatenated

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'm a bit confused about the dplyr verb mutate_each. It's pretty straightforward to use the basic mutate to transform a column of data into, say, z-scores, and create a new column in your data.frame (here with the name z_score_data ): newDF % select(one_column) %>% mutate(z_score_data = one_column - (mean(one_column) / sd(one_column)) However, since I have many columns of data I'd like to transform, it appears I should probably use the mutate_each verb. newDF % mutate_each(funs(scale)) So far so good. But as of yet I haven't been able to

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: #include all .cpp files into a single compilation unit? 5 answers The benefits / disadvantages of unity builds? [duplicate] 3 answers I come from a scripting background and the preprocessor in C has always seemed ugly to me. None the less I have embraced it as I learn to write small C programs. I am only really using the preprocessor for including the standard libraries and header files I have written for my own functions. My question is why don't C programmers just skip all the includes and simply

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 need to extract one element from each column of a matrix according to an index vector. Say: index = [0,1,1] matrix = [[1,4,7],[2,5,8],[3,6,9]] Index vector tells me I need the first element from column 1, second element from column 2, and third element from column 3. The output should be [1,5,8] . How can I write it out without explicit loop? Thanks 回答1: You can use advanced indexing : index = np.array([0,1,2]) matrix = np.array([[1,4,7],[2,5,8],[3,6,9]]) res = matrix[np.arange(matrix.shape[0]), index] # array([1, 5, 9]) For your second

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: Excel VBA, getting range from an inactive sheet 3 answers Any thoughts on why the below code would not be looping through the worksheets? I'm trying to set a column in each sheet based on what the sheet name is. It's getting stuck on the active worksheet, and ignoring the If ws.Name <> "Default" . This is built as a module: Sub LangID_update() Dim wb As Workbook: Set wb = ThisWorkbook Dim ws As Worksheet Dim LastCol As Integer Dim LastRow As Integer Dim rng As Range Application.ScreenUpdating = False

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 data.frames each with three columns: chrom, start & stop, let's call them rangesA and rangesB. For each row of rangesA, I'm looking to find which (if any) row in rangesB fully contains the rangesA row - by which I mean rangesAChrom == rangesBChrom, rangesAStart >= rangesBStart and rangesAStop . Right now I'm doing the following, which I just don't like very much. Note that I'm looping over the rows of rangesA for other reasons, but none of those reasons are likely to be a big deal, it just ends up making things more readable given

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): 由 翻译 强力驱动 问题: I am wondering what is the best way to extract a first item of each sublist in a list of lists and append it to a new list. So if i have: lst = [[ a , b , c ], [ 1 , 2 , 3 ], [ x , y , z ]] and i want to pull out a, 1 and x and create a seperate list from those. I tried: lst2 . append ( x [ 0 ] for x in lst ) 回答1: Using list comprehension : >>> lst = [[ 'a' , 'b' , 'c' ], [ 1 , 2 , 3 ], [ 'x' , 'y' , 'z' ]] >>> lst2 = [ item [ 0 ] for item in lst ] >>> lst2 [ 'a' , 1 , 'x' ] 回答2: You could use zip: >>> lst =[[ 1 , 2 , 3 ],[ 11 , 12

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): 由 翻译 强力驱动 问题: I have the code below: var request = require ( 'request' ); var cheerio = require ( "cheerio" ); var async = require ( "async" ); var MyLink = "www.mylink.com" ; async . series ([ function ( callback ){ request ( Mylink , function ( error , response , body ) { if ( error ) return callback ( error ); var $ = cheerio . load ( body ); //Some calculations where I get NewUrl variable... TheUrl = NewUrl ; callback (); }); }, function ( callback ){ for ( var i = 0 ; i <= TheUrl . length - 1 ; i ++) { var url = 'www.myurl.com=' + TheUrl [