Question

我有一个程序可以为我创建工作笔记，它有效，但是有一个我想摆脱的尾随短划线：

def prompt(input)
  print "[#{Time.now.strftime('%T')}] #{input}: "
  STDIN.gets.chomp
end

def work_performed
  count = 0
  notes = ''
  while true
    input = prompt("Enter work notes[#{count += 1}]")
    notes << "\n" + "#{input}\n"
    if input.empty?
      return notes
    else
      while input.empty? != true
        input = prompt('Enter work notes[*]')
        notes << "  - #{input}\n"
      end
    end
  end
end

运行时：

test
  - tset  
  -
test  
  - tset  
  - 
tset  
  - tset  
  -

如何重构这个以消除关卡末端的尾随破折号？

Answer 1

library(akima) x <- nest6$reLDM y <- nest6$yr y2 <- y^2 z <- nest6$TCL m <- lm(z ~ x*y+y2+x:y2) i <- 25 xtemp <- seq(min(x),max(x),length.out=i) xrange <- rep(xtemp,times=i) ytemp <- seq(min(y),max(y),length.out=i) yrange <- rep(ytemp,each=i) y2temp <- seq(min(y2),max(y2),length.out=i) y2range <- rep(y2temp,each=i) newdata <- data.frame(x=xrange,y=yrange,y2=y2range) zhat <- predict(m,newdata=newdata) xyz <- interp(xrange,yrange,zhat) jet.colors <- colorRampPalette( c("yellow", "red", "blue") ) nbcol <- 500 color <- jet.colors(nbcol) nrz <- length(xyz[[1]]) ncz <- length(xyz[[2]]) z<-xyz[[3]] zfacet <- z[-1, -1] + z[-1, -ncz] + z[-nrz, -1] + z[-nrz, -ncz] facetcol <- cut(zfacet, nbcol) quartz() persp(xyz,xlab="x",ylab="y",zlab="z", cex.lab = 1,cex.axis = 1, theta = 35, phi = 50,col=color[facetcol], border="grey40", ticktype = "detailed", zlim=c(1,7))将始终附加内容，即使<< " - #{input}\n"为空字符串，因此您可以检查它是否为空，以便有条件地附加。

input

Answer 2

我建议你这样写。

<强>代码

require 'time'

def prompt(input)
  print "[#{Time.now.strftime('%T')}] #{input}: "
  gets.chomp
end

def work_performed
  1.step.each_with_object([]) do |count, notes|
    loop do
      input = prompt "Enter work notes[#{count}]"
      return notes.join("\n") if input.empty?
      notes << input
      loop do
        input = prompt("Enter work notes[*]")
        break if input.empty?
        notes << "  - #{input}"
      end
    end
  end
end

示例

让我们使用以下提示和条目进行尝试：

[11:38:35] Enter work notes[1]: Pets [11:38:39] Enter work notes[*]: dog [11:38:40] Enter work notes[*]: cat [11:38:41] Enter work notes[*]: pig [11:38:42] Enter work notes[*]: [11:38:43] Enter work notes[1]: Friends [11:38:53] Enter work notes[*]: Lucy [11:38:55] Enter work notes[*]: Billy-Bo [11:39:04] Enter work notes[*]: [11:39:06] Enter work notes[1]: Colours [11:39:15] Enter work notes[*]: red [11:39:18] Enter work notes[*]: blue [11:39:20] Enter work notes[*]: [11:39:22] Enter work notes[1]:

我们获得：

puts work_performed Pets - dog - cat - pig Friends - Lucy - Billy-Bo Colours - red - blue

备注

我已将notes设为数组而非字符串，因此需要notes.join("\n")。

1.step返回一个枚举器，该枚举器生成以1开头的自然数字（请参阅Numeric#step）。

loop do（请参阅Kernel#loop）比while true更惯用。

如何摆脱尾随破折号

2 个答案: