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  • Python "callable" attribute (pseudo-property)

    - by mgilson
    In python, I can alter the state of an instance by directly assigning to attributes, or by making method calls which alter the state of the attributes: foo.thing = 'baz' or: foo.thing('baz') Is there a nice way to create a class which would accept both of the above forms which scales to large numbers of attributes that behave this way? (Shortly, I'll show an example of an implementation that I don't particularly like.) If you're thinking that this is a stupid API, let me know, but perhaps a more concrete example is in order. Say I have a Document class. Document could have an attribute title. However, title may want to have some state as well (font,fontsize,justification,...), but the average user might be happy enough just setting the title to a string and being done with it ... One way to accomplish this would be to: class Title(object): def __init__(self,text,font='times',size=12): self.text = text self.font = font self.size = size def __call__(self,*text,**kwargs): if(text): self.text = text[0] for k,v in kwargs.items(): setattr(self,k,v) def __str__(self): return '<title font={font}, size={size}>{text}</title>'.format(text=self.text,size=self.size,font=self.font) class Document(object): _special_attr = set(['title']) def __setattr__(self,k,v): if k in self._special_attr and hasattr(self,k): getattr(self,k)(v) else: object.__setattr__(self,k,v) def __init__(self,text="",title=""): self.title = Title(title) self.text = text def __str__(self): return str(self.title)+'<body>'+self.text+'</body>' Now I can use this as follows: doc = Document() doc.title = "Hello World" print (str(doc)) doc.title("Goodbye World",font="Helvetica") print (str(doc)) This implementation seems a little messy though (with __special_attr). Maybe that's because this is a messed up API. I'm not sure. Is there a better way to do this? Or did I leave the beaten path a little too far on this one? I realize I could use @property for this as well, but that wouldn't scale well at all if I had more than just one attribute which is to behave this way -- I'd need to write a getter and setter for each, yuck.

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  • Get element id on hover (or mouseover)

    - by Peter C
    Still getting to grips with jQuery and I am pleased to have got as far as I have, especially help from the posts in this forum. However, now got to a working function that does what I want, that is to create a radio group that looks like a button. It pulls data via json and loops through creating the radio buttons. I want to get the id of the radio buttons generated so that I can then parse through to the next step of the app but I can't get it to work. function FillDiv(groups, side) { var cnt = 1; var newClass = ''; var newType = ''; if (side == '#ck-button-left') { newClass = 'leftClass'; newType = 'radio' } else { newClass = 'rightClass'; newType = 'checkbox' } $.each(groups, function (index, groups) { $(side) .append( $(document.createElement('label')).attr({ id: cnt + 'lbl' }) ); $('#' + cnt + 'lbl') .append( $(document.createElement('input')).attr({ id: groups.GroupCode, type: newType, name: 'testGroup', class: newClass }) ); $('#' + groups.GroupCode).after ( $(document.createElement('span')).text(groups.GroupName).attr('class', 'leftSpan') ); $('#' + cnt + 'lbl').after($(document.createElement('br'))); cnt = cnt + 1; }); } Looking through various searched, it should work with something like... $('#leftSpan').mouseover(function () { $('#lblOutput').html(this.id); }); or, as I suspect, it is something to do with the nesting of the label/input that I need to reference the parent or child. Any pointers would be appreciated.

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  • Binding Javascript Event Handlers to a an Ajax HTML Response?

    - by John
    Let's say I have the following HTML code <div id="outer"> <div id="inner">Hello World</div> </div> At the end of my HTML page, I use javascript to attach event handlers like so, document.getElementById('inner').onclick = function() {alert(this.innerHTML);} document.getElementById('outer').onclick = function() { /* An Ajax Call where the response, which will be a string of HTML content, then goes into document.getElementById('outer').innerHTML */ document.getElementById('inner').onclick = function() {alert(this.innerHTML);} } In the above code, I am expecting <div id="inner">Hello World 2</div> to come back which requires me to re-attach the onclick event handler. This makes sense because the new response coming back is just a string, and I have to tell the browser that after converting to DOM, i also need some event handlers So my question is, is there a better way to manage event handlers on AJAX response that contains HTML content? I could use inline javascript within the html response, but then it prevents me from achieving non-intrusive javascript. So is there a way to achieve non-intrusive javascript and an efficient way to "maintain" event handlers of ajax html responses?

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  • javascript error handling

    - by pankaj
    I have a javascript function for checking errors which I am calling on OnClicentClick event of a button. Once it catch a error I want to stop execution of the click event. But in my case it always it always executes the onclick event. Following is my function: function DisplayError() { if (document.getElementById('<%=txtPassword.ClientID %>').value.length < 6 || document.getElementById('<%=txtPassword.ClientID %>').value.length > 12) { document.getElementById('<%=lblError.ClientID %>').innerText = "Password length must be between 6 to 12 characters"; return false; } var str = <%=PhoneNumber()%>; if(str.length <10) { alert('<%=phoneNum%>'.length); document.getElementById('<%=lblError.ClientID %>').innerText = "Phone Number not in correct format"; return false; } } button html code: <asp:Button runat="server" Text="Submit" ID="btnSubmit" ValidationGroup="submit" onclick="btnSubmit_Click" OnClientClick="DisplayError()"/> It should not execute the button click event once it satisfies any of the IF condition in the javascript function.

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  • Is nginx / node.js / postgres a very scalable architecture?

    - by Luc
    I have an app running with: one instance of nginx as the frontend (serving static file) a cluster of node.js application for the backend (using cluster and expressjs modules) one instance of Postgres as the DB Is this architecture sufficient if the application needs scalability (this is only for HTTP / REST requests) for: 500 request per seconds (each requests only fetches data from the DB, those data could be several ko, and with no big computation needed after the fetch). 20000 users connected at the same time Where could be the bottlenecks ?

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  • [DOM/JS] display table in IE

    - by budzor
    I have code like that: var xPola = 10, //how many cols yPola = 10, //how many cols bokPola = 30, //size of cell body = document.getElementsByTagName('body')[0]; var tablica = document.createElement('table'); body.appendChild(tablica); for( var y = 0; y < yPola; y++ ) { var rzad = document.createElement('tr'); tablica.appendChild(rzad); for( var x = 0; x < xPola; x++ ) { var pole = document.createElement('td'); pole.setAttribute('width', bokPola); pole.setAttribute('height', bokPola); rzad.appendChild(pole); } }; it works fine in FF, Chrome & Opera (it displays 10x10 table with 30px width&height rows). In IE nothing happens. I check in firebug lite and it is in HTML section, inside BODY tag but i see nothing. Whats wrong?

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  • Transfer values from one selection box to another

    - by Tonya Cash
    I need to populate the first box with the items from a db table. Users would choose from the first box, and either drag value(items) to the second for selection, or would select items, and then click a button to move them over to the 2nd box. After that I need to update the db with the selected values/items.

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  • 'Subquery returned more than 1 value' problem in EntityFramework

    - by plotnick
    I have one 'Transaction' entity object with 'Operations' navproperty with multiplicity of 'Many'. When I'm adding only one operation per transaction nothing happens, but when I'm trying to add more than one operation, db.SaveChanges() throws an exception like 'Subquery returned more than 1 value blah, blah, blah' How can I solve that? Help me guys please... BTW... Could you tell me how can I see the exact query string that EF passes to Sql Server on db.SaveChanges() method?

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  • Intersection() and Except() is too slow with large collections of custom objects

    - by Theo
    I am importing data from another database. My process is importing data from a remote DB into a List<DataModel> named remoteData and also importing data from the local DB into a List<DataModel> named localData. I am then using LINQ to create a list of records that are different so that I can update the local DB to match the data pulled from remote DB. Like this: var outdatedData = this.localData.Intersect(this.remoteData, new OutdatedDataComparer()).ToList(); I am then using LINQ to create a list of records that no longer exist in remoteData, but do exist in localData, so that I delete them from local database. Like this: var oldData = this.localData.Except(this.remoteData, new MatchingDataComparer()).ToList(); I am then using LINQ to do the opposite of the above to add the new data to the local database. Like this: var newData = this.remoteData.Except(this.localData, new MatchingDataComparer()).ToList(); Each collection imports about 70k records, and each of the 3 LINQ operation take between 5 - 10 minutes to complete. How can I make this faster? Here is the object the collections are using: internal class DataModel { public string Key1{ get; set; } public string Key2{ get; set; } public string Value1{ get; set; } public string Value2{ get; set; } public byte? Value3{ get; set; } } The comparer used to check for outdated records: class OutdatedDataComparer : IEqualityComparer<DataModel> { public bool Equals(DataModel x, DataModel y) { var e = string.Equals(x.Key1, y.Key1) && string.Equals(x.Key2, y.Key2) && ( !string.Equals(x.Value1, y.Value1) || !string.Equals(x.Value2, y.Value2) || x.Value3 != y.Value3 ); return e; } public int GetHashCode(DataModel obj) { return 0; } } The comparer used to find old and new records: internal class MatchingDataComparer : IEqualityComparer<DataModel> { public bool Equals(DataModel x, DataModel y) { return string.Equals(x.Key1, y.Key1) && string.Equals(x.Key2, y.Key2); } public int GetHashCode(DataModel obj) { return 0; } }

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  • Mysql Windows "mysqldump -t" restore

    - by Glide
    Yes it's Windows sorry. I'm using mysqldump with the option -T which creates a sql and a txt file per table. mysqldump -u user -ppass db -T path I use that option to be able to restore easily one table. Now I'd like to restore all the tables. mysql -u user -ppass db < path/*.sql Obvously doesn't work Also, I don't know where do my funcs/procs go. Thx

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  • How to store a captured image into MySQL database using JavaScript

    - by R J.
    I am capturing image using canvas and i want to store a captured image in MySQL Database using Javascript. This is my code: <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, maximum-scale=1.0"> <style> body {width: 100%;} canvas {display: none;} </style> <title>Instant Camera - Remote</title> <script> var video, canvas, msg; var load = function () { video = document.getElementById('video'); canvas = document.getElementById('canvas'); msg = document.getElementById('error'); if( navigator.getUserMedia ) { video.onclick = function () { var context = canvas.getContext("2d"); context.drawImage(video, 0, 0, 240, 320); var image1 = canvas.toDataURL("image/png"); document.write('<img src="' + image1 + '" />'); }; } else { msg.innerHTML = "Native web camera not supported :("; } }; window.addEventListener('DOMContentLoaded', load, false); </script> </head> <body> <video id="video" width="240" height="320" autoplay> </video> <p id="error">Click on the video to send a snapshot to the receiving screen</p> <canvas id="canvas" width="240" height="320"> </canvas> </body> </html>

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  • Rails: find_by, conserving leading whitespaces

    - by peppermonkey
    Hi, when I do the following def somefunction @texts = A.find_all_by_someid(someid) respond_to do |format| format.xml { render :xml => @texts } end end it gets the string from the db correctly, except if the string has leading whitespaces, it seems they are trimmed. Note: the whitespaces are there in the db correctly What can I do to conserve those whitespaces? Thanks

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  • How to return a variable from a javascript function into html body.

    - by anthr
    Hi there, I am still new to javascript, and I am trying to get a function to return a variable using html & javascript. Basically the function should just return whichever radio button that the user clicks on, although at the moment I don't see anything being returned at all. The function is here: <script type="text/javascript"> function GetSelectedItem() { var chosen = "" len = document.f1.r1.length for (i = 0; i <len; i++) { if (document.f1.r1[i].checked) { chosen = document.f1.r1[i].value } } } return chosen </script> And then in the html section I have these radio buttons, and my attempt to get the variable "chosen" output to the screen. <form name = f1><Input type = radio Name = r1 Value = "ON" onClick=GetSelectedItem()>On <Input type = radio Name = r1 Value = "OFF" onClick =GetSelectedItem()>Off</form> <script type ="text/javascript">document.write(chosen)</script> At the moment nothing seems to be getting returned from the function (although if I output the variable 'chosen' inside the function then it is working correctly. Thanks in advance!

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  • Determining when database zip is unpacked

    - by adehaas
    I am fetching a db zip on initial startup of an AIR app (after 1st install), which I then unpack via FZip. After this operation I immediately need to load data from the generated sqlite db, which fails since I seem not able to determine when the zip is completely unpacked and/or the sqlite has been created. Any suggestions? Thx!

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  • scaffold does not update view

    - by doemsche
    Hi there I have a question to the following procedure: script/generate scaffold product title:string description:text db:migrate #then I generate a migration which adds a column description to the table products and migrate the db again. My question is: why is the field description not added to the project-views? Is that normal rails scaffold behaviour? I think I saw in a video tutorial that the scaffold updates as well the views, which would be very convenient. Thanks in advance for any help!

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  • MySQL charset issue.

    - by Shagymoe
    I'm not sure exactly why this happened, but I'm assuming it was an dump and import. The db is full of characters like — for commas and such. I've tried various solutions on the web, but nothing seems to work. I've verified that the html header specifies utf8. Any ideas on how I can get the entire db back to normal characters?

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  • Zend_Registry - Do you need getInstance() ?

    - by Jesse
    Hey I'm wondering when accessing Zend_Registry in an application if you need to include getInstance() and if so, why? for example Zend_Registry::getInstance()-get('db'); vs. Zend_Registry::get('db'); they both seem to work with the later being less verbose. I vaguely understand that Zend_Registry is a singleton, which I think means there can only be one instance of it? so why would you need getInstance()?

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  • SQL 2000 xp_sendmail

    - by Steven
    Hi Guys, I have a trigger that sends an email once a value has been changed. It works when i make any amendments but when the users make the changes it fails. I have figured out the users havnt got permission to send mails in master.dbo.xp_sendmail The way the DB was originally setup wis shocking!! (each user has a network login rather than being part of a network group) Is there anyway i can allow a role in customerDb to access the xp_sendmail proc in the mater db? Thanks Sp

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  • How to avoid accidental deletions of databases in Lotus Notes?

    - by Saili
    I have always worried about users deleting lotus notes databases by accident. We had one such case last week and I want to know how we can lock the databases so that users cannot delete them. Is there a way in Lotus Notes - either at the Db level or server level where we can set up the database so that only the administer of the db or the user with Manager access can delete the database? Thanks!

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  • Check the value from DBand pass it to next page

    - by user554176
    I have a field ,if user enters data it should go and check db if it is present it should redirect to next page. But here i m not sure whether it is checking the db but mysql query is correct. $ThirdPartyCategoryName =$_POST['ThirdPartyCategoryName']; $activate = mysql_query("SELECT * FROM `thirdpartycategorymaster` WHERE `delete` = 'y' "); if($activate=='y') { header("location:catact.php"); } else { //$activate=='NULL'; header("location:tp_home.php"); }

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  • Setting class properties quickly

    - by uzay95
    class UserClass{ #region Class properties which are binding from DB . . . #endregion #region Constructor Methods public UserClass(int _iUser_id) { // of course this is wrong but how can i quickly set properties // which are coming from DB by extension method over context class? this = DAO.context.GetById<UserClass>(_iUser_id); } #endregion }

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  • Opera bug with JS autoselecting text (if more than 1 div)

    - by E L
    Here is HTML code. It supposed to select all text in "Container" div <B onclick="SelectText(document.getElementById('Container'));">select all text</B> <Div id="Container"> <Div>123456</Div> <Div>123456</Div> <Div onclick="SelectText();">123456</Div> </Div> here is JS code of the SelectText() function function SelectText(target){ if(target==null){ var e = window.event || e; if (!e) var e = window.event; var target=e.target || e.srcElement; } var rng, sel; if ( document.createRange ) { rng = document.createRange(); rng.selectNode( target ); sel = window.getSelection(); sel.removeAllRanges(); sel.addRange( rng ); } else { var rng = document.body.createTextRange(); rng.moveToElementText( target ); rng.select(); } } Problem is that in Opera 12.02 when "select all text" is clicked, all text seems like selected, but it's not selected (I can't rightclick it and copy). (terrific, but IE works fine with it) Why not in Opera?!!! And what can I do to make Opera 12.02 believe that all text in "Container" is selected?

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