each | 易学教程

什么是XSL

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什么是XSL XSL(EXtensible Stylesheet Language)它是指可扩展样式表语言。 XSL之于 XML 就像 CSS 之于 HTML。说白了就是将XML中的数据用指定的显示格式输出．XML不像HTML,它不包含任何显示格式的信息． XSL 包含两个部分： XSLT – 用于转换 XML 文档的语言. XSLT 是指 XSL 转换 (XSL Transformation) XPath – 用于在 XML 文档中导航的语言 XSL 语法任何 XSL 文档的第一行实际上都是 XML 声明： <?xml version="1.0" encoding="GB2312"?> XSL 与 XML ？遵循相同的语法规则在 XML 声明之后，就是 XSL 声明，例如： <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> ...... </xsl:stylesheet> XSL声明必须要有结束标签，上面的声明中还包含命名空间和 XSL 规范的版本。什么是命名空间它指定一组可以在特定文档中使用的元素名称和属性名称。命名空间的作用是避免命名冲突。由于 XML 和其它与 XML 相关的语言都是用户定义的，所以可能出现命名冲突。<table>可能是指一个布局或是一个座位

jQuery when each is completed, trigger function

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问题 how do start a function like redirecting to a new page when .each is done looping my elements? this is my current code: $(\'#tabCurrentFriends > .dragFriend\').each(function(){ var friendId = $(this).data(\'rowid\'); $.ajax({ type: \"POST\", url: \"../../page/newtab.php\", data: \"action=new&tabname=\" + tabname + \"&bid=\" + brugerid + \"&fid=\" + friendid, complete: function(data){ } }); }); 回答1: You can use $.when() / $.then() to redirect your users after all the AJAX requests are done: /

Ruby array access 2 consecutive(chained) elements at a time

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Now, This is the array, [1,2,3,4,5,6,7,8,9] I want, [1,2],[2,3],[3,4] upto [8,9] When I do, each_slice(2) I get, [[1,2],[3,4]..[8,9]] Im currently doing this, arr.each_with_index do |i,j| p [i,arr[j+1]].compact #During your arr.size is a odd number, remove nil. end Is there a better way?? Ruby reads your mind. You want cons ecutive elements? [1, 2, 3, 4, 5, 6, 7, 8, 9].each_cons(2).to_a # => [[1, 2], [2, 3], [3, 4], [4, 5], [5, 6], [6, 7], [7, 8], [8, 9]] .each_cons does exactly what you want. [1] pry(main)> a = [1,2,3,4,5,6,7,8,9] => [1, 2, 3, 4, 5, 6, 7, 8, 9] [2] pry(main)> a.each_cons(2)

javascript中for、each以及foreach的效率对比

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今天同事说js的前端中for的效率比较高，自己不信，因为我记得php中foreach的效率比for的效率高，然后自己做了一个测试，如下： <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>ceshi</title> <script type="text/javascript"> var result = createData(); function createData() { var result = []; for (var index = 0; index < 900000; index++) { result.push(index); } return result; } /** * 模拟jquery的each循环 */ function each(arr, fn) { for (var index = 0, len = arr.length; index < len; index++) { fn.call(null, arr[index],

cycling through a list of colors with sass

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问题 It is possible to have list of three colors: $color-list: x y z; And then apply these three colors by cycling through them and adding them to on an unordered list item. I want: <li>row 1</li> (gets color x) <li>row 2</li> (gets color y) <li>row 3</li> (gets color z) <li>row 4</li> (gets color x) and so on and so forth. I had tried to use the @each (http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#each-directive) function but then it just stops applying color after the first time

$().each vs $.each vs for loop in jQuery?

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问题 I Can\'t understand why it is happening. I read here that : The first $.each constitutes a single function call to start the iterator. The second $(foo.vals).each makes three function calls to start the iterator. The first is to the $() which produces a new jQuery wrapper set (Not sure how many other function calls are made during this process). Then the call to $().each. And finally it makes the internal call to jQuery.each to start the iterator. In your example, the difference would be

Jquery each - Stop loop and return object

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问题 Can anybody tell me why the loop did not stop after the 5 entry? http://jsbin.com/ucuqot/edit#preview $(document).ready(function() { someArray = new Array(); someArray[0] = \'t5\'; someArray[1] = \'z12\'; someArray[2] = \'b88\'; someArray[3] = \'s55\'; someArray[4] = \'e51\'; someArray[5] = \'o322\'; someArray[6] = \'i22\'; someArray[7] = \'k954\'; var test = findXX(\'o322\'); }); function findXX(word) { $.each(someArray, function(i) { $(\'body\').append(\'-> \'+i+\'<br />\'); if(someArray[i]

what's different between each and collect method in Ruby [duplicate]

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问题 This question already has answers here : Array#each vs. Array#map (6 answers) Closed 3 years ago . From this code I don\'t know the difference between the two methods, collect and each . a = [\"L\",\"Z\",\"J\"].collect{|x| puts x.succ} #=> M AA K print a.class #=> Array b = [\"L\",\"Z\",\"J\"].each{|x| puts x.succ} #=> M AA K print b.class #=> Array 回答1: Array#each takes an array and applies the given block over all items. It doesn't affect the array or creates a new object. It is just a way

“for” vs “each” in Ruby

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问题 I just had a quick question regarding loops in Ruby. Is there a difference between these two ways of iterating through a collection? # way 1 @collection.each do |item| # do whatever end # way 2 for item in @collection # do whatever end Just wondering if these are exactly the same or if maybe there\'s a subtle difference (possibly when @collection is nil). 回答1: This is the only difference: each: irb> [1,2,3].each { |x| } => [1, 2, 3] irb> x NameError: undefined local variable or method `x' for

jQuery之使用each方法遍历对象

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jquery的隐式迭代会对所有的DOM对象设置相同的值，但是如果我们需要给每一个对象设置不能的值得时候，就需要自己进行迭代了 each方法 $(selector).each(function(index,element){}) each()方法中可传入一个函数，函数中可以传两个参数参数1：表示当前元素在所有匹配元素中的索引号参数2：表示当前元素（DOM）案例：给不同的li设置不同的透明度 < div > < ul > < li > 1 < / li > < li > 2 < / li > < li > 3 < / li > < li > 4 < / li > < li > 5 < / li > < li > 6 < / li > < li > 7 < / li > < li > 8 < / li > < li > 9 < / li > < li > 10 < / li > < / ul > < / div > // 方法1： for ( let i = 0 ; i < $ ( 'li' ) . length ; i ++ ) { $ ( 'li' ) . eq ( i ) . css ( 'opacity' , ( i + 1 ) / 10 ) ; } // 方法2：（推荐） $ ( 'li' ) . each ( function ( index , element ) {