jscli

Write and run simple Javascript code in common line

Introduction

Write javascript code in command line, read data from stdin, and show the result you expect! The tools is like awk. But it let you write in Javascript.

Why use jscli?

You don't learn awk if you are good at Javascript.
It's easy to add help function using any programming language.
Only one executable. There are not many dependences.

Install

$ go get github.com/kjelly/jscli

Example

json pretty-printing

$ cat content.json |jscli "JSON.stringify(json, null, 2)"

list listening address and port

sudo netstat -tulnp|grep LISTEN|jscli "for(i=0;i<lines.length;i+=1){print(lines[i].split(/\s+/)[3])}"

sudo netstat -tulnp|grep LISTEN|jscli "function f(i){return i[3];}" "matrix.map(f).join('\n')"

sudo netstat -tulnp|grep LISTEN|jscli "printC(matrix, 3)"

list listening address and port and process

sudo netstat -tulnp|grep LISTEN|go run jscli.go "function f(i){printf('%s -> %s\n', i[3], i[6]);}" "matrix.map(f)" "null"

show the same out as netstat -tulnp

sudo jscli.go -f netstat --nostdin "print(netstat('-tulnp'))"

Javascript Builtin Function

Name	Explain
printArray	printArray
printA	printArray
printColumn	printColumn
mapIf	printColumn
mapIf	printColumn