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I try to rewrite sass mixin for generation long text-shadow http://codepen.io/awesomephant/pen/mAxHz to less mixin .long-shadow(@type, @color, @length, @fadeout: true, @skew: false, @direction: right){ @shadow : ''; .if @skew == false or @type == text{ .if @direction == right {@ @for @i from 0 to @length - 1 { @shadow: @shadow + @i + 'px ' + @i + 'px 0 ' + @color + ','; } } .if @direction == left {@ @for @i from 0 to @length - 1 { @shadow: @shadow + @i * -1 + 'px ' + @i + 'px 0 ' + @color + ','; } } } .if @fadeout == true{ @for @i from 1 to @length - 1 { .if @type == text or @skew == false{

规范 1、定义变量时冒号（:）与变量值之间必须（MUST）保留一个空格，冒号前不得（MUST NOT）保留空格。如：错误color:@box_width; 正确color: @box_width; 2、变量命名必须采用 @foo-bar 形式，不得使用 @fooBar 形式。 定义变量 @box_width:100px; 注：100px不用双引号括起来 .box{ color: @box_width; } 变量的运算 在运算中只要变量写了单位，参与运算的值可以不写单位，如果写了其他单位，也会按变量定义的单位编译。 @test_width:200px; @test_height:200px; div{ width: @test_width+200; height: @test_height+200em; } 选择器的嵌套 1、嵌套写法 ul { width: 200px; } ul li{ width: 100px; } 写成： ul { width: 200px; li { widht:100px; } } 2、使用&来将伪类嵌套在对应选择器内 ul li:hover { color: red; } 写成： ul { &:hover{ color: red; } } 　　 来源： https://www.cnblogs.com/web-zqk/p/11382347.html

I'm trying to create an effect where I have a transparent arrow above any image in CSS3. See the following image. Any ideas how to do this effect? Using LESS if that comes to any help. To draw a transparent / inverted triangle in CSS3 you could use the CSS3 triangle technic , and make the inverted shape by combining the :before and :after pseudo objects, each to draw one part of the triangle. You could do something like this: .image { position:relative; height:200px; width:340px; background:orange; } .image:before, .image:after { content:''; position:absolute; width:0; border-left:20px solid

I'm in need of 8 different CSS3 animations which are way too similar, so I used LESS for it. Below is the code, that works perfectly, with one little glitch - the @name variable. .animation_top (@name, @pxFrom, @pxTo) { @-moz-keyframes @name { 0% { top: @pxFrom; opacity: 0; } 100% { top: @pxTo; opacity: 1; } } @-webkit-keyframes @name { 0% { top: @pxFrom; opacity: 0; } 100% { top: @pxTo; opacity: 1; } } @-ms-keyframes @name { 0% { top: @pxFrom; opacity: 0; } 100% { top: @pxTo; opacity: 1; } } } Because css keyframes are started by @ sign, LESS simply ignores the variable of @name. Is there any

When compiling Twitter's Bootstrap 2.3.2. with Less 2 i found to following error: NameError: #grid > .core > .span is undefined in /home/bootstrap-2.3.2/less/navbar.less on line 199, column 3: 198 .navbar-fixed-bottom .container { 199 #grid > .core > .span(@gridColumns); 200 } How can i fix this? I was able to avoid the error without modifying Bootstrap files by creating a new mixin that loaded after the Bootstrap mixins: #grid { .core { .span(@gridColumns) { width: (@gridColumnWidth * @gridColumns) + (@gridGutterWidth * (@gridColumns - 1)); } } }; This was better for us as we avoid patching

SQLi_Labs通关文档 先列举一下sql基础语句 show databases; //查看数据库use xxx; //使用某个数据库show tables; //查看该数据库的数据表desc xxx; //查看该数据表的结构select * from xxx; //查找某个数据表的所有内容select schema_name from information_schema.schemata; //猜数据库select table_name from information_schema.tables where table_schema='xxxxx'; //猜某数据库的数据表Select column_name from information_schema.columns where table_name='xxxxx'; //猜某表的所有列left(a,b) //从左侧截取 a 的前 b 位mid(column_name,start[,length]) //从位置start开始，截取column_name字符串的length位，与substr作用相同substr(string, start, length) //从位置start开始，截取字符串string的length长度，与mid作用相同ascii() //将某个字符转换成ascii码ord() /