shell指令碼echo輸出不換行功能增強執行個體_linux shell

這是第8/101個指令碼

There are as many ways to solve this quirky echo problem as there are pages in this book. One of my favorites is very succinct:

function echon{ echo "$*" | awk '{ printf "%s" $0 }'}

You may prefer to avoid the overhead incurred when calling the awk command, however, and if you have a user-level command called printf you can use it instead:

echon(){ printf "%s" "$*"}

But what if you don't have printf and you don't want to call awk? Then use the tr command:

echon(){ echo "$*" | tr -d '\n'}

This method of simply chopping out the carriage return with tr is a simple and efficient solution that should be quite portable.
這個指令碼很簡單，就是可以用3種不同的函數（方法）來實現，輸出後不換行。