add examples

Author: wenli.lw

examples.md

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+# FIRE LISt
+
+> node-fire just a runner for these node_modules without cli. 
+
+## Examples
+
+
+1. [mathjs](https://github.com/josdejong/mathjs)
+
+ ```
+ $ npm install mathjs
+ $ fire mathjs add 5.1 5.2
+ ```
+
+2. [node-open](https://github.com/pwnall/node-open)
+
+ ```
+ $ npm install open
+ $ fire open index.html
+ $ fire open http://127.0.0.1
+ ```
+
+
+## Support List
+
+* [shelljs](https://github.com/shelljs/shelljs) 
+* [mathjs](https://github.com/josdejong/mathjs)
+* [node-open](https://github.com/pwnall/node-open)
+* [public-ip](https://github.com/sindresorhus/public-ip) fire public-ip v4
+* [cpy](https://github.com/sindresorhus/cpy) fire cpy ...1.html,2.html
+* [find-up](https://github.com/sindresorhus/find-up) fire find-up 1.html
+* [md5] fire md5 test
+* [sha1] fire sha1 test
+* [uuid] fire uuid

test/pipe.js

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+const test = require('ava')
+const exec = require('./_exec')
+test('calc', (t) => {
+ t.is(exec('< examples/calc.js add 3 4'), '7')
+ t.is(exec('< examples/calc.js multiply 3 4'), '12')
+ t.is(exec('< examples/calc.js pow 3'), '9')
+ t.is(exec('< examples/calc.js div 8 0 --b 2'), '4')
+})