| export default const getUnflatten = (arr, idFieldName, parentFieldName) => (arr, parentid) => arr.reduce((all, item) => item[parentFieldName] === parentid ? all.concat({...item, children: getUnflatten(arr, item[idFieldName])}): all, [] ) |
The git command-line utility has plenty of inconsistencies http://steveko.wordpress.com/2012/02/24/10-things-i-hate-about-git/
A GUI like http://sourcetreeapp.com is often helpful, but staying on the command line usually quicker. This is a list of the commands I use most frequently, listed by funcional category:
git status list which (unstaged) files have changed
##Create a new repository on the command line
touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin git@github.com:/.git
| git fetch --all | |
| git reset --hard origin/master | |
| git pull origin master |
众所周知,js中复制包括浅复制（Shallow Clone）和深复制（Deep Clone）两种,深复制的出现主要针对复杂数据结构，如数组和对象，其中浅复制就是运用赋值运算方式（“=”）,为新对象引用所有的源对象属性,这不会产生新的对象，只是一个对象引用（reference）。而深复制则相对复杂一些,它是将所有的原始数据类型，机器所有的对象引用复制到新的对象中,这种复制最终会形成两个对象.关于两种复制的方法的论述已经有许多了,无外乎有以下三种:
第三方库，如underscore.js,jquery, loadsh
JSON大法
js原生方法
关于第三方库的复制方法
| //This is a complete guide for centering a div with CSS. | |
| //见过许多方法来居中div，当然有些方法因情况不同而不同 | |
| //详细可参考： | |
| //1.Centering in CSS: A Complete Guide（https://css-tricks.com/centering-css-complete-guide/） | |
| //2.How To Center Anything With CSS（https://codemyviews.com/blog/how-to-center-anything-with-css） | |
| //3.CSS layout: tricks and layout techniques in ‘Learn CSS Layout’（http://book.mixu.net/css/5-tricks.html） | |
| //4.Absolute Centering（http://codepen.io/shshaw/full/gEiDt） |
| /* | |
| A (very) WIP collection of optimized/recommended jQuery plugin patterns | |
| from @addyosmani, @cowboy, @ajpiano and others. | |
| Disclaimer: | |
| ----------------------- | |
| Whilst the end-goal of this gist is to provide a list of recommended patterns, this | |
| is still very much a work-in-progress. I am not advocating the use of anything here | |
| until we've had sufficient time to tweak and weed out what the most useful patterns |