小编Nat*_* L.的帖子

我刚刚进入LessCSS,我遇到了我认为是主要的限制,我想知道是否有办法做到这一点？我想说我在某处读到Sass允许用户定义的函数,但LessCSS会做同样的事情吗？

我想做什么:

@fs: 16;

// either return the value
.s(@t,@s,@u) {
    // return @t/@s*@u;
}
#elem {
    margin-top: .s(30,@fs,1em);
    width: .s(900,@fs,1em);
    .child {
        width: .s(100,900,100%);
    }
}

// or have a property argument
.s(@t,@s,@u,@p) {
    @{p}: @t/@s*@u;
}
#elem {
    .s(30,@fs,1em,margin-top);
    .s(900,@fs,1em,width);
    .child {
        .s(100,900,100%,width);
    }
}

我能想出来的唯一方法,但它非常有限,因为我必须有多个mixin:

.s(@t,@s,@u,@p) when (@p = margin-top) { margin-top: @t/@s*@u; }
// margin[-top|-right|-bottom|-left]
// padding[-top|-right|-bottom|-left]
.s(@t,@s,@u,@p) when (@p = width) { width: @t/@s*@u; }
.s(@t,@s,@u,@p) when (@p = height) { height: @t/@s*@u; }

我知道我总是可以修改less.js文件来添加一个像内置函数 …

我有一个问题,并想知道是否有人可以给我一些关于原因的见解.以下代码正在向一个日期添加一周:

while (c.getStamp() < b.getStamp()) {
    var f = this.getWeek(c);
    e.push(f);
    c = (c.getStamp() + 604800).toDate();
}

...

Date.prototype.getStamp = function() {
    return Math.round(this.getTime() / 1e3);
};

Number.prototype.toDate = function() {
    return new Date(this * 1e3);
};

我试图让以下工作,但它创建一个连续循环:

while (c.getStamp() < b.getStamp()) {
    var f = this.getWeek(c);
    e.push(f);
    c = new Date(c.getFullYear(), c.getMonth(), c.getDate + 7, 0, 0, 0);
}

哪里c = JS Date, ie 05/01/12和b = JS Date, ie 05/31/12

我收到以下错误,我似乎无法弄清楚为什么或如何触发它.

Fatal error: Cannot access empty property in /home/content/p/l/a/plai1870/html/com/php/Bone/Compiler.php on line 18

第18行是

throw new LogicException($this->$compilers[$language]." is not a supported compiler.");

这是Compiler.php

<?php
namespace Bone;
use LogicException;

class Compiler implements \Bone\Interfaces\Compiler {

    protected $compiler;

    protected $compilers = array(
        "php"           => "PHP",
        "as3"           => "ActionScript3",
        "javascript"    => "Javascript"
    );

    public function __construct($language) {
        $language = strtolower($language);
        if (!isset($this->$compilers[$language])) {
            throw new LogicException($this->$compilers[$language]." is not a supported compiler.");
        }
        $compiler = "\Bone\Compilers\\".$this->$compilers[$language]."\Compiler";
        $this->compiler = new $compiler();
    }

    public function buildDefinition($object, $path = …