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  //pads n with zeros on the left,
	//digits is minimum length of output
	//zeroPad(3, 5); returns "005"
	//zeroPad(2, 500); returns "500"
	zeroPad: function(digits, n) {
		n = n.toString();
		while(n.length < digits)
		n = '0' + n;
		return n;
	},

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(function() {
    var supportOrientation = (typeof window.orientation === 'number' &&
        typeof window.onorientationchange === 'object');

    var init = function() {
        var htmlNode = document.body.parentNode,
            orientation;
        var updateOrientation = function() {
            if (supportOrientation) {
                orientation = window.orientation;

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function getElementTop(element) {
  if (document.documentElement.getBoundingClientRect !== 'undefined') {
    return element.getBoundingClientRect().top + document.body.scrollTop;
  } else {
    var actualTop = element.offsetTop;
    var current = element.offsetParent;
    while (current !== null) {
      actualTop += current.offsetTop;
      current = current.offsetParent;　
    }

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  function getElementViewTop(element) {
    if (document.documentElement.getBoundingClientRect !== 'undefined') {
      return element.getBoundingClientRect().top
    } else {
      var actualTop = element.offsetTop
      var current = element.offsetParent
      while (current !== null) {
        actualTop += current.offsetTop
        current = current.offsetParent
      }

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  function $extend() {
    var arr = arguments,
      result = {},
      i;

    var _isObject = function(o) {
      return Object.prototype.toString.call(o) === '[object Object]';
    }

    var _extend = function self(destination, source) {

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addEventListener("scroll",()=> document.title=`read ${(scrollY/document.body.scrollHeight*100).toFixed(2)}%`)

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#参考资料

• http://bbs.et8.net/bbs/showthread.php?t=568472
• http://www.ruanyifeng.com/blog/2011/09/curl.html

###下载单个文件，默认将输出打印到标准输出中(STDOUT)中

curl http://www.centos.org

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# This configuration file binds many vi- and vim-like bindings to the
# appropriate tmux key bindings.  Note that for many key bindings there is no
# tmux analogue.  This is intended for tmux 1.3, which handles pane selection
# differently from the previous versions

# split windows like vim
# vim's definition of a horizontal/vertical split is reversed from tmux's
bind s split-window -v
bind v split-window -h

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function toChineseNum (index) {
  let str = '' + index
  if (index > 99) return '一百'
  if (index < 10) {
    return str.replace(/1/g, '一')
      .replace(/2/g, '二')
      .replace(/3/g, '三')
      .replace(/4/g, '四')
      .replace(/5/g, '五')
      .replace(/6/g, '六')

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function autoTextarea (elem, extra, maxHeight) {
  extra = extra || 0
  var addEvent = function (type, callback) {
    elem.addEventListener ? elem.addEventListener(type, callback, false) : elem.attachEvent('on' + type, callback)
  }
  var getStyle = elem.currentStyle ? function (name) {
    var val = elem.currentStyle[name]
    if (name === 'height' && val.search(/px/i) !== 1) {
      var rect = elem.getBoundingClientRect()
      return rect.bottom - rect.top - parseFloat(getStyle('paddingTop')) - parseFloat(getStyle('paddingBottom')) + 'px'