The following few threads on this site and StackOverflow were helpful for understanding how IFS works: What is IFS in context of for looping? How to loop over the lines of a file Bash, read line …

2016年7月20日 · The default value for IFS consists of whitespace characters (to be precise: space, tab and newline). Each character can be a word boundary. So, with the default value of …

2023年2月20日 · The default value of IFS is space, tab and newline, so if foo prints out two lines hello world and howdy then the loop body is executed with x=hello, then x=world and …

2015年6月12日 · IFS is the Input Field Separator, which means the string read will be split based on the characters in IFS. On a command line, IFS is normally any whitespace characters, …

2011年8月17日 · The IFS= read -r line sets the environment variable IFS (to an empty value) specifically for the execution of read. This is an instance of the general simple command …

Any character in IFS that is not IFS whitespace, along with any adjacent IFS whitespace characters, delimits a field. A sequence of IFS whitespace characters is also treated as a …

2017年10月10日 · In old versions of bash you had to quote variables after <<<.That was fixed in 4.4. In older versions, the variable would be split on IFS and the resulting words joined on …

2021年3月19日 · An alternative way of doing this, suggested by LL3 in comments (now deleted), relies on prefixing the unset command by :, a built-in utility that does nothing, effectively …

Note that you may set the IFS variable for only the read built-in utility by invoking read like. IFS=, read ... This avoids setting IFS to a non-default value for the rest of the script. Possibly also …

2008年3月27日 · Hi, I have modified the IFS variable in the K shell program and with in the program i want to reset to the default one. How do i reset the same. e.g in the begining of the …