parameter-passing

问题 I got a bit of a newbie question. I'm trying to pass a variable from my view to my controller. Is there anyway my method in my controller can receive variables from my view? Post view: show.html.erb: .... <%=link_to "Add relationship", :method => :add_relationship(@rela) %> Controller: post.controller.rb: def add_relationship(rela) @post = Post.find(params[:id]) if current_user.id == @post.user_id @post.rel_current_id = rela.id @post.save redirect_to relationships_url else redirect_to posts

问题 <s:url action="someAction" var="act"> <s:param name="param1">value1</s:param> </s:url> <s:a href="%{act}">Go Action</s:a> By clicking Go Action link, the address will be www.example.com/someAction?param1=value1 I want to hide passed parameters (param1=value1) like method="POST" in submitting of form. Is there anyway I can do it? Thanks. 回答1: To hide passed parameter actually you need to submit the form. You should prevent the default behavior of the click event and replace it with the form

问题 <s:url action="someAction" var="act"> <s:param name="param1">value1</s:param> </s:url> <s:a href="%{act}">Go Action</s:a> By clicking Go Action link, the address will be www.example.com/someAction?param1=value1 I want to hide passed parameters (param1=value1) like method="POST" in submitting of form. Is there anyway I can do it? Thanks. 回答1: To hide passed parameter actually you need to submit the form. You should prevent the default behavior of the click event and replace it with the form

问题 I have done a a bash script which run php script. It works fine without parameters but when I add parameters (id and url), there are some errors: PHP Deprecated: Comments starting with '#' are deprecated in /etc/php5/cli/conf .d/mcrypt.ini on line 1 in Unknown on line 0 Could not open input file: /var/www/dev/dbinsert/script/automatisation.php? id=1 I run php script from the bash like this: php /var/www/dev/dbinsert/script/automatisation.php?id=19&url=http://bkjbezjnkelnkz.com 回答1: Call it as

问题 We have a requirement to run python scripts from Javascript. We have to pass an input String to the python script as an argument, and display the python output onto our web page. Here is the Python code, this code works fine when I run this in my linux box: ./sample.py 12345 , gives the output 12345 and ./sample.py would display no argument found #!/usr/bin/env python import os import sys if len(sys.argv) > 1: output = sys.argv[1] else: output = "no argument found" print "Hello World!!!"

问题 I'm currently reading the book: "Computer Systems - A Programmers Perspective". I've found out that, on the x86-64 architecture, we are limited to 6 integral parameters which will be passed to a function in registers. The next parameters will be passed on the stack. And also, the first up-to-8 FP or vector args are passed in xmm0..7. Why not use float registers in order to store the next parameters, even when the parameters are not single/double precision variables? It would be much more

问题 I'm currently reading the book: "Computer Systems - A Programmers Perspective". I've found out that, on the x86-64 architecture, we are limited to 6 integral parameters which will be passed to a function in registers. The next parameters will be passed on the stack. And also, the first up-to-8 FP or vector args are passed in xmm0..7. Why not use float registers in order to store the next parameters, even when the parameters are not single/double precision variables? It would be much more

问题 The following works: def spam(): print "spam" exec(spam.__code__) spam But what if spam takes arguments? def spam(eggs): print "spam and", eggs exec(spam.__code__) TypeError: spam() takes exactly 1 argument (0 given) Given, that I don't have access to the function itself but only to a code object, how can I pass arguments to the code object when executing it? Is it possible with eval? Edit: Since most readers tend not to believe in the usefulness of this, see the following use case: I want to

问题 In a Windows Phone 7 Silverlight application I call a new page using NavigationService.Navigate(new Uri("/View/SecondPage.xaml", UriKind.Relative)); Now I want to pass parameters to the new page. I understand a simple parameter can be passed using: NavigationService.Navigate(new Uri("/View/TilgungsratePage.xaml?id=4711", UriKind.Relative)); and read in the new page using protected override void OnNavigatedTo(Microsoft.Phone.Navigation.PhoneNavigationEventArgs e) { base.OnNavigatedTo(e);

问题 I am trying to run a shell command from within awk for each line of a file, and the shell command needs one input argument. I tried to use system() , but it didn't recognize the input argument. Each line of this file is an address of a file, and I want to run a command to process that file. So, for a simple example I want to use 'wc' command for each line and pass $1 to wc. awk '{system("wc $1")}' myfile 回答1: you are close. you have to concatenate the command line with awk variables: awk '