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  • How do I detect a text input's value and set a class with jQuery?

    - by Zander
    I would like to make sure if a textbox has any content at all, that jQuery can show it's parent (an <li class="hidden_dedication") element and set add a class of 'shown'. I'm pretty sure that it should be something like this, but cannot get it to work: if ($('li.hidden_dedication input').val() !== null) { $(this).parent().show().addClass('shown'); } I cannot figure it out.. any ideas? Many thanks

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  • How to optimize perl code for directory exists or not ?

    - by SCNCN2010
    sub DirectoryExists { my $param = shift; # Remove first element of the array shift @{$param}; # Loop through each directory to see if it exists foreach my $directory (@{$param}) { unless (-e $directory && -d $directory) { return 0; } } # True return 1; } is there any way to optimize this code ? is there any good way to optimize this code

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  • What is the best approach in SQL to store multi-level descriptions?

    - by gime
    I need a new perspective on how to design a reliable and efficient SQL database to store multi-level arrays of data. This problem applies to many situations but I came up with this example: There are hundreds of products. Each product has an undefined number of parts. Each part is built from several elements. All products are described in the same way. All parts would require the same fields to describe them (let's say: price, weight, part name), all elements of all parts also have uniform design (for example: element code, manufacturer). Plain and simple. One element may be related to only part, and each part is related to one product only. I came up with idea of three tables: Products: -------------------------------------------- prod_id prod_name prod_price prod_desc 1 hoover 120 unused next Parts: ---------------------------------------------------- part_id part_name part_price part_weight prod_id 3 engine 10 20 1 and finally Elements: --------------------------------------- el_id el_code el_manufacturer part_id 1 BFG12 GE 3 Now, select a desired product, select all from PARTS where prod_id is the same, and then select all from ELEMENTS where part_id matches - after multiple queries you've got all data. I'm just not sure if this is the right approach. I've got also another idea, without ELEMENTS table. That would decrease queries but I'm a bit afraid it might be lame and bad practice. Instead of ELEMENTS table there are two more fields in the PARTS table, so it looks like this: part_id, part_name, part_price, part_weight, prod_id, part_el_code, part_el_manufacturer they would be text type, and for each part, information about elements would be stored as strings, this way: part_el_code | code_of_element1; code_of_element2; code_of_element3 part_el_manufacturer | manuf_of_element1; manuf_of_element2; manuf_of_element3 Then all we need is to explode() data from those fields, and we get arrays, easy to display. Of course this is not perfect and has some limitations, but is this idea ok? Or should I just go with the first idea? Or maybe there is a better approach to this problem? It's really hard to describe it in few words, and that means it's hard to search for answer. Also, understanding the principles of designing databases is not that easy as it seems.

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  • How can I find a URL called [link] inside a block of HTML containing other URLs?

    - by DrTwox
    I'm writing a script to rewrite Reddit's RSS feeds. The script needs to find a URL named [link] inside a block of HTML that contains other URLs. The HTML is contained in an XML element called <description>. Here are two examples of the <description> element from I need to parse and the [link] I would need to get. First example: <description>submitted by &lt;a href=&#34;http://www.reddit.com/user/wildlyinaccurate&#34;&gt; wildlyinaccurate &lt;/a&gt; &lt;br/&gt; &lt;a href=&#34;http://wildlyinaccurate.com/a-hackers-guide-to-git&#34;&gt;[link]&lt;/a&gt; &lt;a href="http://www.reddit.com/r/programming/comments/26jvl7/a_hackers_guide_to_git/"&gt;[66 comments]&lt;/a&gt;</description> The [link] is: http://wildlyinaccurate.com/a-hackers-guide-to-git Second example: <description>&lt;!-- SC_OFF --&gt;&lt;div class=&#34;md&#34;&gt;&lt;p&gt;I work a support role at a company where I primarily fix issues our customers our experiencing with our software, which is a browser based application written primarily in javascript. I&amp;#39;ve been doing this for 2 years, but I want to take it to the next level (with the long term goal being that I become proficient enough to call myself a developer). I&amp;#39;ve been reading &amp;quot;Javascript The Definitive Guide&amp;quot; by O&amp;#39;Reilly but I was wondering if any of you more experienced users out there had some tips on taking it to the next level. Should I start incorporating some PHP and Jquery into my learning? Side projects on my spare time? Any good online resources? Etc. &lt;/p&gt; &lt;p&gt;Thanks! &lt;/p&gt; &lt;/div&gt;&lt;!-- SC_ON --&gt; submitted by &lt;a href=&#34;http://www.reddit.com/user/56killa&#34;&gt; 56killa &lt;/a&gt; &lt;br/&gt; &lt;a href=&#34;http://www.reddit.com/r/javascript/comments/26nduc/i_want_to_become_more_experienced_with_javascript/&#34;&gt;[link]&lt;/a&gt; &lt;a href="http://www.reddit.com/r/javascript/comments/26nduc/i_want_to_become_more_experienced_with_javascript/"&gt;[4 comments]&lt;/a&gt;</description> The [link] is: http://www.reddit.com/r/javascript/comments/26nduc/i_want_to_become_more_experienced_with_javascript/

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  • Why this jquery plugin not working with 1.4.2

    - by metal-gear-solid
    http://plugins.jquery.com/project/semantictabs What is the means of this Status - Recommended for 1.0.x I'm using this plugin code as it is http://plugins.jquery.com/files/jquery.semantictabs.js_4.txt then this ( I'm also using prototype.js onsite) jQuery.noConflict(); jQuery(document).ready(function(){ $("#mytabset").semantictabs({ panel:'.mypanelclass', //-- Selector of individual panel body head:'headelement', //-- Selector of element containing panel header, i.e. h3 active:':first' //-- Which panel to activate by default }); });

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  • Create comma seperated values in perl

    - by Mike
    Let's say I have a list of elements @list=(1,2,3); #desired output 1,2,3 And I want to print them as comma seperated values. And most importantly, I do not want the last element to have a comma after it. What is the cleanest way to do this in Perl?

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  • Flexible array members in C - bad?

    - by Lionel
    I recently read that using flexible array members in C was poor software engineering practice. However, that statement was not backed by any argument. Is this an accepted fact? (Flexible array members are a C feature introduced in C99 whereby one can declare the last element to be an array of unspecified size. For example: ) struct header { size_t len; unsigned char data[]; };

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  • How to control placement of control in code behind

    - by teshio
    Is it possible to control the placement of a generated control in asp .net 2.0 (c#)? So for example in my page_load I create a new Panel() and then do Form.Controls.Add(pnl). However I'm finding it renders right at the end of the form. I would like it rendering as the first element in the form.

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  • jQuery bind method

    - by rajeeesh
    In one of my HTML page dynamically loading some file field while clicking a button like follows $('#add').click(function(){ $('#files').append('<input type="file" class="myfile" name="myfile" />'); }); My question is how to "bind" newly added element to HTML page so that I can access like $('.myfile').change(function(){ // Code Here }); I am asking this because $('.myfile').live('change',function(){ // Code here }); not working in all browsers , expecially IE Please help thanks

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  • jQuery: Scroll down page a set increment (in pixels) on click?

    - by bcWeb
    I'm trying to make a page scroll down 150px from the current position when an element is clicked. So lets say you're roughly halfway scrolled down a page. You click this link, and it will slide you down an additional 150 pixels. Is this possible with jQuery? I've been looking at scrollTop and the scrollTo plugin, but I can't seem to connect the dots.

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  • Is it bad to be semantic purist all the time, at work?

    - by metal-gear-solid
    Is it bad to be semantic purist all the time, at work? is it not achievable all the time ? when i saw code of any other person/interviewee. I know selection of element for a purpose is most important thing. what i should judge person ability from his code; from a good written, managed, optimized css or how he wrote class and id names? Or both every time.

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  • How can I find the boundaries of a subset of a sorted list?

    - by Alex
    I have the following dilemma: I have a list of strings, and I want to find the set of string which start with a certain prefix. The list is sorted, so the naive solution is this: Perform binary search on the prefixes of the set, and when you find an element that starts with the prefix, traverse up linearly until you hit the top of the subset. This runs in linear time, however, and I was wondering if anyone can suggest a more efficient way to do it.

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  • Append some HTML into the HEAD tag?

    - by Alex
    Hi! I want to add some style to head tag in html page using javascript. var h = document.getElementsByTagName('head').item(0); h.innerHTML += '<style>a{font-size:100px;}</style>'; But when I run this code in IE8 I see this error message: Could not set the innerHTML property. Invalid target element for this operation. Any ideas?

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  • I got the address of a large managed object in WinDbg, what next?

    - by Mahen
    I created a high memory utilization dump and using !dumpheap -stat and !dumpheap -mt I got the address of two large string generic list of 30 MB each. I want to know more about these lists. What they contain or which piece of code is using them. Is there a way to find them out? 0:000 !do 2b370038 Name: System.Object[] MethodTable: 71e240bc EEClass: 71c0da54 Size: 33554448(0x2000010) bytes Array: Rank 1, Number of elements 8388608, Type CLASS Element Type: System.Collections.Generic.List`1[[System.String, mscorlib]] Fields: None

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  • How make a loop using JQUERY?

    - by learner
    Hi I have a comma separated string. I split that string and assigned it to elements var. How can I loop that elements var? $(document).ready(function(){ var element = $('#imageIds').val().split(","); // how to loop this elements using jquery });

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