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  • validate hostname in Python

    - by kostmo
    Following up to Regular expression to match hostname or IP Address? and using Restrictions on valid host names as a reference, what is the most readable, concise way to match/validate a hostname/fqdn (fully qualified domain name) in Python? I've answered with my attempt below, improvements welcome.

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  • validation in javascript - remove the error msg on focus

    - by fusion
    i'm not very well-versed with javascript, so please bear with me. i've a form in which i validate the controls with javascript. the error is displayed when the fields are empty via a div, but when i focus and type something in the textbox, the div should go away. but the error div doesn't and even if i type something valid, it still displays the div. i'd like to know where am i going wrong with this script: <script type="text/javascript"> var err = document.getElementById("errmsg"); function checkInput(inPut) { if (inPut.getValue() == "") { err.setStyle('display', 'block'); err.setTextValue("Field cannot be empty!"); inPut.focus(); return false; } else { return true; } } function checkTextBox(textBox) { if (textBox.getValue() == "") { err.setStyle('display', 'block'); err.setTextValue("Field cannot be empty!"); textBox.focus(); return false; } else if (!checkValidity(textBox.getValue())) { err.setStyle('display', 'block'); err.setTextValue("Please enter a valid email address!"); textBox.focus(); return false; } else { return true; } } . . . <div id="errmsg" class="invalid" style="display:none;"></div> <br /> . . . <input type="text" tabindex="1" name="name" id="name" class="input_contact" onblur="checkInput(this);"/> <br /> . . . <input type="text" tabindex="2" name="email" id="email" class="input_contact" onblur="checkTextBox(this);"/> <br /> it's a form in facebook app but while the fbjs works, i assume there's a problem with my basic javascript.

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  • optional arguments in haskell

    - by snorlaks
    Hello, I have declared my own type: data Book = Bookinfo { bookId :: Int, title :: String } deriving(Show) and now: x = Bookinfo it is all ok, valid statement but making bookId x throws an error. If I would be able to handle errors in Haskell that would be ok but right now I cant do this So Im curious how to make not specified values of fields take default value, and what exactly value is there when I'm not giving vcalues of fields in construcotr ? thanks for help

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  • Rails escape_javascript creates invalid JSON by escaping single quotes

    - by Arrel
    The escape_javascript method in ActionView escapes the apostrophe ' as backslash apostrophe \', which gives errors when parsing as JSON. For example, the message "I'm here" is valid JSON when printed as: {"message": "I'm here"} But, <%= escape_javascript("I'm here") %> outputs "I\'m here", resulting in invalid JSON: {"message": "I\'m here"} Is there a patch to fix this, or an alternate way to escape strings when printing to JSON?

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  • Regular Expression for Decimal or Blank

    - by Phil P
    Sorry for the potentially dumb question but I am trying to pull together a regular expression that will allow: A number with 1 or 2 numbers before a decimal point, and 0-6 numbers after the decimal point. However I also need to allow the field to be blank if so required. Valid Examples 0.952321 1.20394 12.12 25 Blank Invalid Examples 123.45678 1.1234567 Please can anyone help?

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  • Is there any reason to prefer UTF-16 over UTF-8?

    - by Oak
    Examining the attributes of UTF-16 and UTF-8, I can't find any reason to prefer UTF-16. However, checking out Java and C#, it looks like strings and chars there default to UTF-16. I was thinking that it might be for historic reasons, or perhaps for performance reasons, but couldn't find any information. Anyone knows why these languages chose UTF-16? And is there any valid reason for me to do that as well?

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  • validate hostname string in Python

    - by kostmo
    Following up to Regular expression to match hostname or IP Address? and using Restrictions on valid host names as a reference, what is the most readable, concise way to match/validate a hostname/fqdn (fully qualified domain name) in Python? I've answered with my attempt below, improvements welcome.

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  • Simple question about WinForms and ListView

    - by Alex
    Hello I have a ListView in my WinForms application. ListWiew has 4 columns. So i want to write string in fourth column on every LisViewItem. When i try it. foreach (ListViewItem item in lvData.Items) { item.SubItems[3].Text ="something"; } i get an exception InvalidArgument=Value of '4' is not valid for 'index'. Parameter name: index What's wrong?

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  • XML in the csproj file

    - by pm_2
    Can anyone point me to a schema or a list of properties valid inside the C# csproj file? I've looked, but don't appear to be able to find any documentation on it.

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  • C# .NET Email Regular Expression Validation

    - by Pino
    Can anyone correct the expression below to also not allow blank field? <asp:RegularExpressionValidator ID="expEmail" runat="server" ControlToValidate="txtEmail" ErrorMessage="valid email address required" ValidationExpression="^([a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]){1,70}$"></asp:RegularExpressionValidator>

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  • Regex validate dates like "Sun, 20 Jun 10"

    - by Trindaz
    Hi, I'm working on a regular expression that will only return true when a date string is in a format something like 'ddd, dd mmm yy'. Valid matches would be values like "Sun, 20 Jun 10" or "Mon, 21 Jun 10" but not "Sunday, 20 Jun 10" or "20 Jun 10". This will be used with mb_ereg in PHP. My attempts so far have only got me half way there. Any help appreciated! Thanks, Dave

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  • Python try...except comma vs 'as' in except

    - by peter
    What is the difference between ',' and 'as' in except statements, eg: try: pass except Exception, exception: pass and: try: pass except Exception as exception: pass Is the second syntax legal in 2.6? It works in CPython 2.6 on Windows but the 2.5 interpreter in cygwin complains that it is invalid. If they are both valid in 2.6 which should I use?

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  • How to handle input and parameter validation between layers?

    - by developr
    If I have a 3 layer web forms application that takes user input, I know I can validate that input using validation controls in the presentation layer. Should I also validate in the business and data layers as well to protect against SQL injection and also issues? What validations should go in each layer? Another example would be passing a ID to return a record. Should the data layer ensure that the id is valid or should that happen in BLL / UI?

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  • How to Compare Dates in php?

    - by Ramakrishnan
    i need code to compare date in php Input date should be a valid date input date should not be less than the current date. i need to give time zones EST,PST,etc.. We need to make the time to GMT and compare with Current Time. can anyone help on this. Thanks Ramakrishnan.p

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  • MPIexec.exe Access denide

    - by shake
    I have installed microsoft compute cluster and MPI.net, now i have trouble to run program using mpiexec.exe on cluster. When i try to run it on console i get message: "Access Denied", and pop up: "mpiexec.exe is not valid win32 application". I tried google it, but found nothing. Pls help. :)

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  • Unfamiliar notation found in a computer science book

    - by cornjuliox
    I'm reading through this computer science book and throughout the book I see a number of things written like so: and then there's this: and then this: What kind of notation is the "Boolean Expression" in example 1 written in? I've never seen anything like it before and I'm tempted to assume that whoever wrote and/or scanned this book in fell asleep at the keyboard, and assuming that it's even valid, what about the 3rd example? I'm pretty sure that's not C++ or VB.NET they're showing there.

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  • App.config vs. .ini files

    - by Jakob Gade
    I'm reviewing a .NET project, and I came across some pretty heavy usage of .ini files for configuration. I would much prefer to use app.config files instead, but before I jump in and make an issue out of this with the devs, I wonder if there are any valid reasons to favor .ini files over app.config?

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  • Get values of textareas generated dynamically

    - by Hulk
    In the below code,the textaraes are generated dynamically ,now how to get these values for validations in valid() function.. <script> function valid() { //get all textarea vales for validation } function add(col_det) { var row = '<tr>'; row += '<td>'; row += '<textarea rows = "8" cols = "8" class = "input" WRAP id="row_details'+r_count+'" name ="row_details'+r_count+'"></textarea>'; row += '</td>'; for (var i=0;i<col_det.length;i++) { row += '<td> <div id = "div_content_bold"> <textarea rows = "2" cols = "8" class = "input" id="c_details'+c_count+'" name="col_details'+l_count+'" WRAP ></textarea> </div> </td>'; } row += '<td></td>'; row += '</tr>'; return row; } $(document).ready(function() { var cnt = '<input type="text" name="title" id="title" ><br><br>'; cnt += '<table cellspacing="0" cellpadding="0" border="1" width="100%" id="l_table">'; cnt += '<tr>'; cnt += '<th width="30%">Category</th>'; cnt += headers(col_data); cnt += '<th width="10%">Grade obtained</th>'; cnt += '</tr>'; for(var i=0;i<criteria;i++) { cnt += add(col_data,i); } cnt += '</table>'; $('#content').append(cnt); }); </script> <form action="create/" method="post" name="aa"> <div id="content"></div> <table> <tr><td> <input type="submit" value="Save" id="Save" onclick="javascript:var ret=validate(row_c,c_count);return ret;"/></td></tr> Thanks....

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  • Network Connection NSNotification for OSX?

    - by Andrew
    I simply need to have a notification post when a valid IP address is assigned. I have tried polling via SCReachability, but that seems to be inefficient. Any suggestions? This seems like it should be simple, but I've been struggling for several hours to get anything working.

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  • Regular expression for a phone number

    - by Zerobu
    Hello, I would like a regular expression in this format. It Must match one of the following formats: * (###)###-#### * ###-###-#### * ###.###.#### * ########## Strip all whitespace. Make sure it's a valid phone number, then (if necessary) translate it to the first format listed above.

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