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Is there any valid reason radians are used as the inputs to trig function in many modern languages?

- by johnmortal

Is there any pressing reason trig functions should use radian inputs in modern programming languages? As far as I know radians are typically ugly to deal with except in three cases: (1) You want to compute an arc length and you know the angle of the arc and (2) You need to do symbolic calculus with trig functions (3) certain infinite series expansion look prettier if the input is in radians. None of these scenarios seem like a worthy justification for every programming language I am familiar with using radian inputs for Sin, Cos, Tangent, etc... The third one sounds good because it might mean one gets faster computations using radians (very slightly faster- the cost of one additional floating point multiplication ) , but I am dubious even of that because most commonly the developer had to take an extra step to put the angle in radians in the first place. The other two are ridiculous justifications for all the added obscurity.

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What's the role of the parentheses in the following piece of code?

- by Emanuil

This is the tracking code for Google Analytics: var _gaq = _gaq || []; _gaq.push(["_setAccount", "UA-256257-21"]); _gaq.push(["_trackPageview"]); (function() { var ga = document.createElement("script"); ga.type = "text/javascript"; ga.async = true; ga.src = ("https:" == document.location.protocol ? "https://ssl" : "http://www") + ".google-analytics.com/ga.js"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(ga, s); })(); You can see that the function is inside parentheses. Why do you think is that?

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Simple XML parsing with Google Picasa API and JQuery

- by zeedog

I'm starting to look into Google's Picasa API for photo data, which provides you with a big XML file with info about albums and photos. I'm doing some quick and dirty tests to parse the XML file (which is saved locally to my hard drive for now) with JQuery and pull out the album id's, which are stored as "gphoto:id" tags, and display them in a div: $(document).ready(function() { $.get( 'albums.xml', function(data) { $(data).find('entry').each(function() { var albumId = $(this).children('gphoto:id').text(); $('#photos').append(albumId + '<br />'); }) }) }) I'm getting the following error in the console: jquery.js:3321 - Uncaught Syntax error, unrecognized expression: Syntax error, unrecognized expression: id This will work with other tags in the XML file (such as title, author, updated, etc.), but I'm trying to understand what's going on here. Does it have to do with the colon in "gphoto:id", somehow?

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Does Google Analytics have peformance overhead?

- by Mohit Nanda

To what extent does Google Analytics impact performance? I'm looking for the following: Benchmarks (including response times/pageload times et al) Links or results to similar benchmarks One (possible) method of testing Google Analytics (GA) on your site: Serve ga.js (the Google Analytics JavaScript file) from your own server. Update from Google Daily (test 1) and Weekly (test 2). I would be interested to see how this reduces the communication between the client webserver and the GA server. Has anyone conducted any of these tests? If so, can you provide your results? If not, does anyone have a better method for testing the performance hit (or lack thereof) for using GA?

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How do I start a XUL Runner application maximized?

- by Anthony D

I've started developing my first app with XUL and I've run into a problem that I can't seem to solve. All I want to do is have my app start maximized. I've set the sizemode attribute to maximized on my top level window element but that has no effect. My prefs.js file has the following line: pref("toolkit.defaultChromeFeatures", "chrome,centerscreen,menubar,resizable,status,toolbar,scrollbars"); This also does not work. My window appears and it only has a close button (X) and does not have a minimize or maximize button. Any ideas???

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Get Janrain to work with Sproutcore?

- by weng

Since Sproutcore is not dependent on the backend server to render pages, I'm struggling on how to get it working with Janrain. In one of the login processes of Janrain a HTTP request is sent to a backend server that processes the information and render a logged in page to the user. Since I'm using Sproutcore and don't have a backend server but using CouchDB to serve Sproutcore I wonder how I am going to implement Janrain successfully. Even if I'm using a backend server like Node.js I'm still not sure how to implement Janrain. Has anyone implemented Janrain in a Sproutcore app?

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How to efficiently replace characters in XML document in Java?

- by Pregzt

I'm looking for a neat and efficient way to replace characters in XML document. There is a replacement table defined for almost 12.000 UTF-8 characters, most of them are to be replaced by single characters, but some must be replaced by two or even three characters (e.g. Greek theta should become TH). The documents can be bulky (100MB+). How to do it in Java? I came up with the idea of using XSLT, but I'm not too sure if this is the best option.

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MYSQL: How do I set a date (makedate?) with month, day, and year

- by chongman

Hi? I have three columns, y, m, and d (year, month, and day) and want to store this as a date. What function would I use on mySQL to do this? Apparently makedate uses year and day of year (see below), but I have month. I know I can use STR_TO_DATE(str,format), by constructing the string from (y,m,d), but I would guess there is an easier way to do it. REFERENCES MAKEDATE(year,dayofyear) Returns a date, given year and day-of-year values. dayofyear must be greater than 0 or the result is NULL.

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Counting divs for pagination in Jquery

- by Craig Ward

I want to create a nice pagination in Jquery for a number of divs I have. EG: <div class="container"> <div id="one">content</div> <div id="two">content</div> <div id="three">content</div> <div id="four">content</div> </div> The number will not always be the same so I need to count the divs, and display a pagination like the one below. 1|2|3|4 Clicking on the page number would display the relevant div. I know how to show and hide elements using Jquery and css and have figured out I can count the divs using var numPages = $('.container').size(); but I can't work out how I can display the pagination. Any pointers?

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wxpython: Updating a dict or other appropriate data type from wx.lib.sheet.CSheet object

- by bvmou

If I have a notebook with three spreadsheet widgets, what is the best way to have changes to the spreadsheet update a dictionary (or maybe an sqlite file?). Do all wx grid objects come with a built in dictionary related to the SetNumberRows and SetNumberCols? Basically I am looking for guidance on how to work with the user-input data from a spreadsheet widget, as in this example adapted from the tutorial on python.org: class ExSheet(wx.lib.sheet.CSheet): def __init__(self, parent): sheet.CSheet.__init__(self, parent) self.SetLabelBackgroundColour('#CCFF66') self.SetNumberRows(50) self.SetNumberCols(50) class Notebook(wx.Frame): def __init__(self, parent, id, title): wx.Frame.__init__(self, parent, id, title) nb = wx.Notebook(self, -1, style=wx.NB_BOTTOM) self.sheet1 = ExSheet(nb) self.sheet2 = ExSheet(nb) self.sheet3 = ExSheet(nb) nb.AddPage(self.sheet1, "Sheet1") nb.AddPage(self.sheet2, "Sheet2") nb.AddPage(self.sheet3, "Sheet3") self.sheet1.SetFocus() self.StatusBar()

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How to float all child divs to center inside a parent div?

- by Pandiya Chendur

i use a parent div with three child divs , <div id="parentDiv"> <div id="PagerUp" class="pager"> </div> <div id="ResultsDiv"> </div> <div id="PagerDown" class="pager"> </div> </div> But what i get is this http://img132.imageshack.us/img132/5923/floatingdivs.jpg How to float all those divs to center.... Hint:I dint apply any css...

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jCarousel not working properly within tabbed menu

- by user369292

Hi everybody, I'm riding three different jCarousel ul, one in each target of a tabbed menu designeb by Yetii. The problem issue is that the one in the first target works well, whereas the remaining two show just a slice of the first picture and slide soon onto a back frame. The jCarousel is initialized by a class as the behaviour required is the same for all targets: jQuery(document).ready(function() { jQuery('.jcarousel-skin-tango').jcarousel({ wrap: 'circular', //size:8, scroll:1, animation:.10, auto:5, }); }); The ul have different id. Tried also initializing the script by separate id but nothing changed. Any suggestion on it? Thanks in advance - Mauirizio

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Is it valid syntax to have ordered and unordered lists in sequence in markdown?

- by nfm

I just wrote some markdown and it doesn't seem to render correctly. Is it legal syntax to have an ordered list, followed by newlines, then followed by an unordered list? Or is this a bug in bluecloth? For example: 1. One 2. Two 3. Three * Apple * Banana * Carrot Bluecloth creates a single <ul> and nests apple, banana and carrot as <li>'s under it. Stackoverflow's markdown parser does this too. Am I just doing it wrong? Surely this is a common usage case...

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PhoneGap 1.5 (Cordova) + ChildBrowser Whitelist Issue

- by dSquared

I am creating an app using PhoneGap 1.5 (Cordova) and the ChildBrowser Plugin (newest version with naming for PG 1.5 / Cordova.) I use the ChildBrowser plugin to display webpages, PDFs etc. in the app. In previous versions of PG the Whitelist wasn't as restrictive and would load external resources (css/js etc.) located on remote servers / CDNs called from webpages displayed in the ChildBrowser as long as the main URL was Whitelisted. This appears to have changed and I cannot find a way around it. Is there a way to allow all URLs to be whitelisted as long as they are loaded through an already whitelisted URL, or is whitelisting every single possible URL the only way? Any help would be greatly appreciated!

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Which C++ graphics library should I use?

- by mspoerr

Hello, I found the following graphics libraries, but I am not sure which one I should use. Maybe there are some more... Graphviz (http://www.graphviz.org/) Boost Graph Library (http://www.boost.org/doc/libs/1_42_0/libs/graph/doc/index.html) Lemon (http://lemon.cs.elte.hu/trac/lemon) igraph (http://igraph.sourceforge.net/introduction.html) What it should do: draw a undirected network map come as header only or static lib for Windows the output format should be user editable Graphviz is the only one I tried so far, but I found no static lib for it, I failed to build it by my own and the documentation could be better. Therefore I looked around and found these other three libs. I would be glad to get some recommendations which lib to choose. Thanks, /mspoerr

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Google Analytics to track FireFox extension use

- by Swizec Teller

Hi all, I'm developing a Firefox extension and would like to track its use with google analytics, but I can't get it working. I've tried manually calling a funstion from ga.js, but that didn't work for some reason. No error was produced, but neither was any data collected. My last attempt was to have a website that just holds the tracking javascript and then loading it within the extension in an iframe with the URL configured so it contains meaningful data. This way the analytics are getting connected when I visit said webpage with a browser, but not in an extension. I've tried putting some visible javascript ont he site and have confirmed the site's javascript is executing. This method also works with other trackers, but I don't like their output and would prefer Google Analytics. Any ideas what else I could try to accomplish this?

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many to many tables linked to grid view

- by yousof

i have web page that save data for stores, these stores have activities i want to determine the activities for those stores. this reason i make three tables: first one is : tbOLActivity has fields: ActivityId int (pk), ActivityName nvarchar(50) second one is : tbOLStore has fields: StoreId int (pk), StoreName nvarchar(50), ActivityId int (fk), Address navrchar(50) therd one is: tbOLStoreActivty has fields : SerialNo int (pk), StoreId int (fk), ActivityId int (fk), Activity_Status int i make combobox in web page called "AcivityCombo" to display the data of tbOLActivity table If CtvAct.GetRecords("Fill_ActivityTb") = True Then AcivityCombo.DataSource = CtvAct.MainDataset.Tables("tbOLActivity").DefaultView AcivityCombo.DataTextField = "ActivityName" AcivityCombo.DataValueField = "ActivityId" AcivityCombo.DataBind() the problem is how to select item from this combo and insert it into gridview then save data into the tables

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Sifr Font last word get cut in IE8

- by Asif Kilwani

Sifr 3 font cut last word in IE8. Click here for snapshot Following is the js code <script type="text/javascript"> var cochin = { src: '<?=jsPath?>sifr/fonts/eurostile.swf' ,ratios: [7, 1.32, 11, 1.31, 13, 1.24, 14, 1.25, 19, 1.23, 27, 1.2, 34, 1.19, 42, 1.18, 47, 1.17, 48, 1.18, 69, 1.17, 74, 1.16, 75, 1.17, 1.16] }; sIFR.activate(cochin); sIFR.replace(cochin, { selector: 'h1' ,css: [ '.sIFR-root { font-weight: bold; font-size:31px; color:#848484; text-transform:uppercase; display:inline;}' ] ,wmode: 'transparent' }); sIFR.fitExactly = true; sIFR.forceWidth = true; </script>

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Lightweight PHP server to bundle with application?

- by munchybunch

Does there exist some sort of PHP server that can be bundled with a locally-deployed application? It sounds wonky, but the end result is I can't use a remote web server to do anything. Clients will be downloading a package, and the plan is to use a Java backend that reads from a flat file. The flat file contains settings and is modified through a GUI written in HTML/JS, and this is where the server would come in. The forms in HTML should be able to submit to the server, which does a simple file write to the flat file. Is there any simple, lightweight server that has that simple feature? When running the executable for the application, it would start the installation process for the server before moving the web GUI files to the appropriate locations. Note that I'm doing this for a client, so I can't quite change the reqs and would rather not discuss their effectiveness. I would be ever thankful if people had suggestions for the server though!

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Before after select event validation and results with jquery

- by richbyte

I am using a javascript function (F) (jquery )which uses 3 select values selected by the user to calculates a value - R(result) R is a number ranging from (1 through 9), (11) and (22); I need 2 extra steps one before the calculation and one after. a. Before calculation takes place: Make sure all three select values are changed before function(F) takes place. If not prompt the user with a notice ( create dom element/ I am using jquery) b. After the value R is calculated show an element corresponding to the result e.g. if R is 1 show an element ( a predetermined "link" element corresponding to each result value) thanks a lot.

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Acts as Tree with Multiple Models

- by Joe

I've got several models that I'd like to relate together hierarchically. For simplicity's sake, let's say I've got these three: class Group < ActiveRecord::Base acts_as_tree has_many :users end class User < ActiveRecord::Base acts_as_tree belongs_to :group has_many :posts end class Post < ActiveRecord::Base acts_as_tree belongs_to :user end Under the current acts_as_tree, each node can individually can relate hierarchically to other nodes provided they are of the same type. What I'd like is to remove this restriction on type identity, so that SomePost.parent could have a User or a Post as its' parent, and that SomeUser.parent could have another user or a group as its parent. Any thoughts?

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Is there a difference between Perl's shift versus assignment from @_ for subroutine parameters?

- by cowgod

Let us ignore for a moment Damian Conway's best practice of no more than three positional parameters for any given subroutine. Is there any difference between the two examples below in regards to performance or functionality? Using shift: sub do_something_fantastical { my $foo = shift; my $bar = shift; my $baz = shift; my $qux = shift; my $quux = shift; my $corge = shift; } Using @_: sub do_something_fantastical { my ($foo, $bar, $baz, $qux, $quux, $corge) = @_; } Provided that both examples are the same in terms of performance and functionality, what do people think about one format over the other? Obviously the example using @_ is fewer lines of code, but isn't it more legible to use shift as shown in the other example? Opinions with good reasoning are welcome.

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Jquery show() not working in FF

- by Andrea Zironda

I have issues with FF & Jquery .show(). my website shows an embedded map from google in clicking a link.i have got a javascript function that handle this, in safari it works great.FF won't show the map. this is the js. function: function mostraPagina(nome){ if (nome='mappa'){ $('#mappa').load('contenuti/mappe/mappa_thiene.html'); $('#dark_background').show(600); $('#mappa').show(600); } } the embedded code from google maps is: <iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Via+Murialdo,+4,+Thiene+italy&sll=45.710686,11.475665&sspn=0.002439,0.005676&ie=UTF8&hq=&hnear=Via+Murialdo,+4,+36016+Thiene+Vicenza,+Veneto,+Italy&ll=45.710222,11.475618&spn=0.001219,0.002838&t=h&z=14&output=embed"></iframe> thank you very much.

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jquery and codeigniter

- by rabidmachine9

Hello people, and sorry if that question is stupid I'm trying to use javascript with codeigniter and I can't get it right what I'm actually doing is placing jQuery inside the views folder and call it from one of my view files like that: <script type="text/javascript" src="jquery.js"></script> I get no response no errors it just doesn't work, I could also display more code but my first assumption is that there something wrong with the way I call it... maybe something with the paths? any workarounds? thanks in advance

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Does C# have an equivalent to JavaScript's encodeURIComponent()?

- by travis

In JavaScript: encodeURIComponent("©v") == "%C2%A9%E2%88%9A" Is there an equivalent for C# applications? For escaping HTML characters I used: txtOut.Text = Regex.Replace(txtIn.Text, @"[\u0080-\uFFFF]", m => @"&#" + ((int)m.Value[0]).ToString() + ";"); But I'm not sure how to convert the match to the correct hexadecimal format that JS uses. For example this code: txtOut.Text = Regex.Replace(txtIn.Text, @"[\u0080-\uFFFF]", m => @"%" + String.Format("{0:x}", ((int)m.Value[0]))); Returns "%a9%221a" for "©v" instead of "%C2%A9%E2%88%9A". It looks like I need to split the string up into bytes or something. Edit: This is for a windows app, the only items available in System.Web are: AspNetHostingPermission, AspNetHostingPermissionAttribute, and AspNetHostingPermissionLevel.

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