92hackers

schema	type	description
id	number	id of current instance
created_at	date	when instance created?
updated_at	date	when instance updated?
status	[1,2,3]	life status of instance

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const value = Number(amount)

this.validateFaield = !isNaN(value) ? value > balance : true
  ||
  ||
this.validateFailed = !(value <= balance)

// compare NaN value always return false.

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const binary = 0b1111
//=> 15

const oct = 0o1111
//=> 585

const decimal = 1111
// => 1111

const hex = 0x1111

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const random = require('lodash/random')

const swap = (arr, a, b) => {
  const c = arr[a]
  arr[a] = arr[b]
  arr[b] = c
}

/**

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with open('file') as f:
    data = f.read()
    print(data)
# with expression construct a context

# class method，最关键的是，context 本质上就是 __enter__, __exit__ 这两个方法，with 会自动的运行这两个方法。
class CustomOpen(object):
    def __init__(self, filename):
        self.file = open('filename')
        

92hackers

# python built-in data types.

Boolean bool 值  True  or  Flase
String
Bytes  / bytes array
Number
dict  key/value pairs
tuple  immutable unorder data
list   ordered mutable data 
set  unorder mutable data, values is unique,

92hackers

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

var Article = require('../../../models/article');

Those suck for maintenance and they're ugly.

Possible solutions

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#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which

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# 1: sort a list
data = [{'cid': 32, 'haha': 'nice'},
 {'cid': 31, 'haha': 'nice'},
 {'cid': 30, 'haha': 'nice'},
 {'cid': 29, 'haha': 'nice'},
 {'cid': 28, 'haha': 'nice'},
 {'cid': 27, 'haha': 'nice'},
 {'cid': 26, 'haha': 'nice'},
 {'cid': 25, 'haha': 'nice'},
 {'cid': 24, 'haha': 'nice'},

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This text now lives at https://github.com/MarcDiethelm/contributing/blob/master/README.md. I turned it into a Github repo so you can, you know, contribute to it by making pull requests.

---

Contributing

If you want to contribute to a project and make it better, your help is very welcome. Contributing is also a great way to learn more about social coding on Github, new technologies and and their ecosystems and how to make constructive, helpful bug reports, feature requests and the noblest of all contributions: a good, clean pull request.