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Use of ifelse to assign values to a new dataframe column in R

做~自己de王妃 提交于 2021-02-20 18:52:08
问题 I have a time series dataframe and would like to create a new numeric column with values which are a function of an existing numeric column and which are assigned according to the day of the week column. For example, I would require something like the following code: Day <- c("Mo", "Mo", "Mo", "Tu", "Tu", "We", "We", "We", "We", "Th") Val <- c(1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000) df <- data.frame(cbind(Day,Val)) df$Adj <- ifelse(df$Day == "Mo" || df$Day == "Tu", as

Is it possible in C++11 to combine functions into a new function?

痴心易碎 提交于 2021-02-20 18:51:54
问题 This is more a kind of theoretical question. Is it possible in C++11 to combine functions into a new function? For example : auto f = [](int i){return i * 2;}; auto g = [](int i){return i + 10;}; So this works: auto c = f(g(20)); // = 60 But I want an object that stores the combination, like auto c = f(g); std::cout << c(20) << std::endl; //prints 60 Edit: Additionally what i want to create is a function a, which you can give a function b and an int n , and which returns the n'th combination

dplyr Update a cell in a data.frame

风流意气都作罢 提交于 2021-02-20 18:51:46
问题 df <-data.frame(x=c(1:5),y=c(letters[1:5])) Let's say I want to modify the last row, update.row<-filter(df,x==5) %>% mutate(y="R") How do I update this row into the data.frame ? The only way, I found albeit a strange way is to do an anti-join and append the results. df <-anti_join(df,update.row,by="x") %>% bind_rows(update.row) However, it seems like a very inelegant way to achieve a simple task. Any ideas are much appreciated... 回答1: If you are insistant on dplyr , perhaps df <-data.frame(x

How to upload IPA file to App Store from Mac OS X Catalina

半腔热情 提交于 2021-02-20 18:51:43
问题 I just created an app in Apple Developer portal and now I want to upload an IPA file created from Phonegap to App Store. How can I do it? In Mac OS X Catalina there is no iTunes app and I don't find in XCode > Open Developer Tool > Application loader. UPDATE: I can open Archives window in XCode but my app does not appear in the list. 回答1: Try xcrun altool command line: xcrun altool --upload-app --type ios --file <Path-to-ipa> --username <Username> --password <One-time-pass> Remember to use

How to create horizontal forms with twitter bootstrap and rails simple form

烂漫一生 提交于 2021-02-20 18:51:26
问题 I am trying to create horizontal forms with simple-form and bootstrap. I have already installed bootstrap using "rails generate simple_form:install". This is what i have in html.erb <%= simple_form_for(@company, :html => { :class => "form-horizontal" }) do |f| %> <div class="form-group"> <label class="col-md-4 control-label"></label> <div class="col-md-4"> <%= f.input :name %> </div> </div> But the form still appears vertically. 回答1: simple_form is a really great gem for generating bootstrap

why cant I redirect the output from sed to a file

隐身守侯 提交于 2021-02-20 18:51:12
问题 I am trying to run the following command ./someprogram | tee /dev/tty | sed 's/^.\{2\}//' > output_file But the file is always blank when I go to check it. If I remove > output_file from the end of the command, I am able to see the output from sed without any issues. Is there any way that I can redirect the output from sed in this command to a file? 回答1: Remove output-buffering from sed command using the -u flag and make sure what you want to log isn't on stderr -u, --unbuffered load minimal

How to upload IPA file to App Store from Mac OS X Catalina

孤人 提交于 2021-02-20 18:51:11
问题 I just created an app in Apple Developer portal and now I want to upload an IPA file created from Phonegap to App Store. How can I do it? In Mac OS X Catalina there is no iTunes app and I don't find in XCode > Open Developer Tool > Application loader. UPDATE: I can open Archives window in XCode but my app does not appear in the list. 回答1: Try xcrun altool command line: xcrun altool --upload-app --type ios --file <Path-to-ipa> --username <Username> --password <One-time-pass> Remember to use

child_added gets triggered after remove

两盒软妹~` 提交于 2021-02-20 18:50:48
问题 I've created this handler to watch for new children being created. This little trick stops the child_added event from triggering my code on each page load. Instead it only gets triggered when something is actually added. // Listen for new rooms being created var first_room_added_after_load = true; this._roomRef.endAt().limit(1).on('child_added', function(snapshot){ if (first_room_added_after_load) { // we want to skip the first room, because it will already exist first_room_added_after_load =

Unable to override django-allauth templates

删除回忆录丶 提交于 2021-02-20 18:50:46
问题 I'm trying to override the default django-allauth templates. I've copied the templates from the allauth folder in my site-packages to my applications template directory. The structure is as follows myapp --templates ----account ----admin ----socialaccount ----www ----base.html My settings.py has the TEMPLATE_DIRS set TEMPLATE_DIRS = ( os.path.join(BASE_DIR, "templates"), ) As per this answer I'm loading my application before allauth. Making any changes to the templates in my directory doesn't

How does max.poll.records affect the consumer poll

ぃ、小莉子 提交于 2021-02-20 18:50:29
问题 max.poll.records has been recently changed to 500 in kafka consumer config, but I am wondering how does this affect the consumer poll. Is it just an upper bound of the maximum number of records that could be fetched or the consumer waits till it gets 500 records. 回答1: max.poll.records : Yes from new consumer this property is changed to 500 by default which means consumer can poll minimum 1 to max 500 records for each poll, and which means consumer will not wait when partition did not have