arg

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: In many SO questions and bash tutorials I see that I can access command line args in bash scripts in two ways: $ ~ >cat testargs.sh #!/bin/bash echo "you passed me" $* echo "you passed me" $@ Which results in: $ ~> bash testargs.sh arg1 arg2 you passed me arg1 arg2 you passed me arg1 arg2 What is the difference between $* and $@ ? When should one use the former and when shall one use the latter? 回答1: The difference appears when the special parameters are quoted. Let me illustrate the differences: $ set -- "arg 1" "arg 2" "arg 3" $ for word

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 understanding problem with passing arguments to a function in R. In the following example, I retrieve a value from a named list by name. When I do it directly, it returns the value. But when I put the same code into a function, it returns NULL. What happens here? Thanks in advance, Mirko namedlist <- list(a=c("50", "80"), b=c("50")) namedlist$a # returns: [1] "50" "80" myfunction <- function(arg){ namedlist$arg } myfunction(a) # returns: NULL 回答1: You are requesting: namedlist$arg and of course there isn't a component with the name

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: When trying to calculate the exponential moving average (EMA) from financial data in a dataframe it seems that Pandas' ewm approach is incorrect. The basics are well explained in the following link: http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:moving_averages When going to Pandas explanation, the approach taken is as follows (using the "adjust" parameter as False): weighted_average[0] = arg[0]; weighted_average[i] = (1-alpha) * weighted_average[i-1] + alpha * arg[i] This in my view is incorrect. The "arg"

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: Short version: Is it enough to wrap the argument in quotes and escape \ and " ? Code version I want to pass the command line arguments string[] args to another process using ProcessInfo.Arguments. ProcessStartInfo info = new ProcessStartInfo(); info.FileName = Application.ExecutablePath; info.UseShellExecute = true; info.Verb = "runas"; // Provides Run as Administrator info.Arguments = EscapeCommandLineArguments(args); Process.Start(info); The problem is that I get the arguments as an array and must merge them into a single string. An