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bb:tldr:cee23
bb: Bind input to a sequence of EDN(Extensible Data Notation) values from stdin.
$ echo "{:key 'val}" | bb -I "(:key (first *input*))"
try on your machine
The command echo "{:key 'val}" | bb -I "(:key (first *input*))"
consists of two parts connected by a pipe |
.
-
echo "{:key 'val}"
:- The
echo
command is used to print the given string or value. - In this case, the string being echoed is
"{:key 'val}"
, which represents a Clojure map with a single key-value pair. The key is:key
, and the value is the symbol'val
.
- The
-
bb -I "(:key (first *input*))"
:bb
is a command-line utility for working with Clojure code from the command line.- The
-I
flag specifies an expression to evaluate usingbb
. - In this case, the expression being evaluated is
(:key (first *input*))
. This expression takes the first element of the input provided tobb
, and then accesses the value associated with the:key
key in that element. - The input is obtained from the
echo
command through the pipe|
. So, the output fromecho
(i.e.,"{:key 'val}"
) is used as the input forbb
. - The output of
bb
will be the value associated with the:key
key in the input map. In this case, it will be the symbol'val
.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.