append | 易学教程

Jquery - Perform callback after append

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问题 I am appending content to a list using: $('a.ui-icon-cart').click(function(){ $(this).closest('li').clone().appendTo('#cart ul'); }); I want to perform further functions to the appended content (change class, apply animations etc) How can I perform a callback on this function that will allow me to perform functions on the appended data? 回答1: jQuery's .each() takes a callback function and applies it to each element in the jQuery object. Imagine something like this: $('a.ui-icon-cart').click

jQuery appending to AJAX loaded SVG problem

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问题 I am successfully loading via AJAX some svg from external file: $("#svg").load(svgUrl + " svg", function() { // do stuff }); My HTML looks like that: <div id="svg" ...> <svg ...> ... </svg> </div> I can see the graphics just fine. Now I want to add some additional svg elements to the loaded svg. I changed my script to: $("#svg").load(svgUrl + " svg", function() { $("svg").append("<g id='compass'></g>"); // do stuff }); For some reasons the added element appears as hidden in firebug and no

Python: Create a new list from a list when a certain condition is met

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问题 I want to make a new list from another list of words; when a certain condition of the word is met. In this case I want to add all words that have the length of 9 to a new list. I have used : resultReal = [y for y in resultVital if not len(y) < 4] to remove all entries that are under the length of 4. However, I do not want to remove the entries now. I want to create a new list with the words, but keeping them in the old list. Perhaps something like this: if len(word) == 9: newlist.append()

Easier way to get a jQuery object from appended element

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问题 Is there an easier/quicker way to get the element added using jQuery append: How to get the $selectors element: $container.append('<div class="selectors"></div>'); var $selectors = $('.selectors', $container); I tried: var $selectors = $container.append('<div class="selectors"></div>'); but that makes $selectors = $container Maybe that's the quickest/best way. Just checking. 回答1: Why not just: var el = $('<div class="selectors"></div>'); $container.append(el); ? Then you have access to 'el'.

如何在Python中附加文件？

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您如何附加到文件而不是覆盖文件？有附加到文件的特殊功能吗？ #1楼我总是这样做 f = open(' file name.txt', 'a') f.write("stuff") f.close() 这很简单，但是非常有用。 #2楼这是我的脚本，该脚本主要计算行数，然后追加，然后再对它们进行计数，这样您就可以证明它起作用了。 shortPath = "../file_to_be_ append ed" short = open(shortPath, 'r') ## this counts how many line are originally in the file: long_path = "../file_to_be_appended_to" long = open(long_path, 'r') for i,l in enumerate(long): pass print "%s has %i lines initially" %(long_path,i) long.close() long = open(long_path, 'a') ## now open long file to append l = True ## will be a line c = 0 ## count the number of lines you write while l: try:

Wait until previous .append() is complete

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问题 How can we make append wait until the previous append is complete. I am appending huge amount of data so the present append should check if the previous append is complete. I am able to do this by giving all the append's independently with some time delay. But practically according to my code I may have 'n' number of appends so I want to do this dynamically. I tried using for or while loop but the script is getting corrupted and the browser is crashing because the next append is starting

Wait until previous .append() is complete

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jQuery textarea append newline behavior

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问题 I'm trying to append a strings which end in newlines to a textarea using jQuery. However, different newline tokens show different behavior in Firefox3.5 and IE8, and I can't seem to find a way to use something that works for both browsers. \n works in FF but not in IE <br/> and \r\n work in IE but not in FF No luck using <pre></pre> tags either I've seen info on the IE innerHTML issue but I'm not exactly sure how to best approach this problem in jQuery. Thanks for any help! 回答1: Not sure how

Appending to the end of a file with NSMutableString

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问题 I have a log file that I'm trying to append data to the end of. I have an NSMutableString textToWrite variable, and I am doing the following: [textToWrite writeToFile:filepath atomically:YES encoding: NSUnicodeStringEncoding error:&err]; However, when I do this all the text inside the file is replaced with the text in textToWrite. How can I instead append to the end of the file? (Or even better, how can I append to the end of the file on a new line?) 回答1: I guess you could do a couple of

如何有效地连接字符串

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在 Go 中， string 是基本类型，这意味着它是只读的，并且对它的每次操作都将创建一个新字符串。因此，如果我想在不知道结果字符串长度的情况下多次连接字符串，那么最好的方法是什么？天真的方式是： s := "" for i := 0; i < 1000; i++ { s += getShortStringFromSomewhere() } return s 但这似乎不是很有效。 #1楼我只是在我自己的代码（递归树遍历）中对上面发布的最佳答案进行了基准测试，而简单的concat运算符实际上比 BufferString 更快。 func (r *record) String() string { buffer := bytes.NewBufferString(""); fmt.Fprint(buffer,"(",r.name,"[") for i := 0; i < len(r.subs); i++ { fmt.Fprint(buffer,"\t",r.subs[i]) } fmt.Fprint(buffer,"]",r.size,")\n") return buffer.String() } 这需要0.81秒，而以下代码： func (r *record) String() string { s := "(\"" + r.name + "\" [" for i := 0;