函数学习 有些事，记下来是不错的选择...

CentOS7安装FFmpeg

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CentOS7安装python3和pip3

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Linux让脚本在任意路径可执行

环境：centos7.4

将对应的程序所在路径加到 Path 环境变量里，可以实现在任意地方执行脚本的效果。Bash 运行后会先加载 .bashrc 文件，所以可以把脚本路径添加到 .bashrc 文件。

假设，脚本放在 /home/opc/scripts 目录下，脚本名称是 aliyundrive-cli_linux_amd64。
运行下面代码将其加到 .bashrc：

export PATH="/home/opc/scripts:$PATH"

再使用 source 命令使修改生效：

$ source ~/.bashrc

完事

为你的网页添加可爱的小猫咪吧~ 调用JS返回顶部

页眉(header)或者页脚(footer)引入js文件，（可将go-top.js其中的图片地址改成你自己自定义的）：

<script src="https://cdn.jsdelivr.net/gh/jquery/jquery@3.2.1/dist/jquery.min.js"></script>
<script src="<?php $this->options->themeUrl('go-top.js');?>"></script>
<a href="#" class="cd-top faa-float animated animate-bounce-up" style="top: -900px;"></a>

go-top.js代码如下：

var scrolltotop={
    //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
    //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top).
    setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
    controlHTML: '<img src="/go-top.png" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
    controlattrs: {offsetx:50, offsety:30}, //offset of control relative to right/ bottom of window corner
    anchorkeyword: 'javascript:scroll(0,0)', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links
 state: {isvisible:false, shouldvisible:false},
    scrollup:function(){
        if (!this.cssfixedsupport) //if control is positioned using JavaScript
            this.$control.css({opacity:0}) //hide control immediately after clicking it
        var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
        if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
            dest=jQuery('#'+dest).offset().top
        else
            dest=0
        this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
    },
    keepfixed:function(){
        var $window=jQuery(window)
        var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
        var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
        this.$control.css({left:controlx+'px', top:controly+'px'})
    },
    togglecontrol:function(){
        var scrolltop=jQuery(window).scrollTop()
        if (!this.cssfixedsupport)
            this.keepfixed()
        this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false
        if (this.state.shouldvisible && !this.state.isvisible){
            this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0])
            this.state.isvisible=true
        }
        else if (this.state.shouldvisible==false && this.state.isvisible){
            this.$control.stop().animate({opacity:0}, this.setting.fadeduration[1])
            this.state.isvisible=false
        }
    },
   
    init:function(){
        jQuery(document).ready(function($){
            var mainobj=scrolltotop
            var iebrws=document.all
            mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
            mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body')
            mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
                .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'})
                .attr({title:'Scroll to Top'})
                .click(function(){mainobj.scrollup(); return false})
                .appendTo('body')
            if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
                mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
            mainobj.togglecontrol()

$('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
                mainobj.scrollup()
                return false
            })
            $(window).bind('scroll resize', function(e){
                mainobj.togglecontrol()
            })
        })
    }
}
scrolltotop.init()

效果嘛~~就是右边拉你上去的小猫猫呀！

JW Player 插入视频测试

JW Player is the most powerful & flexible video platform powered by the fastest, most-used HTML5 online video player.

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