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  • Rails fields_for parameters for a has_many relation don't yield an Array in params

    - by user1289061
    I have a model Sensor with has_many and accepts_nested_attributes_for relationships to another model Watch. In a form to update a Sensor, I have something like the following <%= sensor_form.fields_for :watches do |watches_form| %> <%= watches_form.label :label %><br /> <%= watches_form.text_field :label %> <% end %> This is indended to allow editting of the already-created Watches belonging to a Sensor. This call spits form inputs as so: <input name="sensor[watches_attributes][0][label]" ... /> <input name="sensor[watches_attributes][0][id]" ... /> When this gets submitted, the params object in the Sensor controller gets an assoc like "sensor" => { "id"=>"1", "watches_attributes"=> { "0"=>{"id" => "1", "label" => "foo"}, "1"=>{"id" => "2", "label" => "bar"} } } For a has_many, accepts_nested_attributes_for update to work upon the @sensor.update_attributes call, it seems that that attributes key really must map to an Array. From what I've seen in the examples, the combination of has_many, accepts_nested_attributes_for, and sensor_form.fields_for should allow me to pass the resulting params object directly to @sensor.update_attributes and update each related object as intended. Instead the Sensor takes place, with no errors, but the Watch objects are not updated (since "watches_attributes" maps to a Hash instead of an Array?) Have I missed something?

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  • How to apply global filter on Entity Framework?

    - by Hernan
    I have a table in my model named Customers with a field IsActive. Whenever I run a query on Customers, only the active customers should be retrieved. I can include the filter in every query, but that doesn't look very. I would like to be able to override the Customers property at the Object Context lever, but I am not sure if this is possible. Any help would be very appreciated! Thanks

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  • MS Surface Tag Visualizer steals contact events

    - by Isak Savo
    I'm struggling with the TagVisualizer control on an MS Surface project. In theory the control seems great, allowing you to respond to input from real world physical objects The problem is that the control will cover the entire screen (since I want to capture tags on the entire screen) and as such, no other controls in my app will receive the touch events. (Unless, they are direct ascendants in the visual tree). In my app, I want to have a "layer" type of a approach, where each layer can respond to (contact) input: Window `- Grid `- LayersPanel `- TagVisualizer `- Layer 1 `- Layer 2 `- Layer 3 `- Layer 4 Now it doesn't matter where I put the tag visualizer, it's always going to steal contact events from all or some of the other layers. (due to the nature of RoutedEvents) To me, it seems like the control is completely useless in practice as it will always interfere with your application's other controls. What am I missing here? So my questions are: Any suggestions on how to work around this? Has anyone used TagVisualizers in a similar scenario? If so, how did you solve this? By the way, the layers all work fine, since they will only steal events that are directly on top of their sub elements (the rest of the layer is invisible to hit testing)

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  • Turing Machine & Modern Computer

    - by smwikipedia
    I heard a lot that modern computers are based on Turing machine. I'd like to share my understanding and hear your comments. I think the computer is a big general-purpose Turing machine. Each program we write is a small specific-purpose Turing machine. The classical Turing machine do its job based on the input and its current state inside and so do our programs. Let's take a running program (a process) as an example. We know that in the process's address space, there's areas for stack, heap, and code. A classical Turing machine doesn't have the ability to remember many things, so we borrow the concept of stack from the push-down automaton. The heap and stack areas contains the state of our specific-purpose Turing machine (our program). The code area represents the logic of this small Turing machine. And various I/O devices supply input to this Turing machine. The above is my naive understanding about the working paradigm of modern computer. I couln't wait to hear your comments. Thanks very much.

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  • Neural Network with softmax activation

    - by Cambium
    This is more or less a research project for a course, and my understanding of NN is very/fairly limited, so please be patient :) ============== I am currently in the process of building a neural network that attempts to examine an input dataset and output the probability/likelihood of each classification (there are 5 different classifications). Naturally, the sum of all output nodes should add up to 1. Currently, I have two layers, and I set the hidden layer to contain 10 nodes. I came up with two different types of implementations 1) Logistic sigmoid for hidden layer activation, softmax for output activation 2) Softmax for both hidden layer and output activation I am using gradient descent to find local maximums in order to adjust the hidden nodes' weights and the output nodes' weights. I am certain in that I have this correct for sigmoid. I am less certain with softmax (or whether I can use gradient descent at all), after a bit of researching, I couldn't find the answer and decided to compute the derivative myself and obtained softmax'(x) = softmax(x) - softmax(x)^2 (this returns an column vector of size n). I have also looked into the MATLAB NN toolkit, the derivative of softmax provided by the toolkit returned a square matrix of size nxn, where the diagonal coincides with the softmax'(x) that I calculated by hand; and I am not sure how to interpret the output matrix. I ran each implementation with a learning rate of 0.001 and 1000 iterations of back propagation. However, my NN returns 0.2 (an even distribution) for all five output nodes, for any subset of the input dataset. My conclusions: o I am fairly certain that my gradient of descent is incorrectly done, but I have no idea how to fix this. o Perhaps I am not using enough hidden nodes o Perhaps I should increase the number of layers Any help would be greatly appreciated! The dataset I am working with can be found here (processed Cleveland): http://archive.ics.uci.edu/ml/datasets/Heart+Disease

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  • Use LaTeX Listings to correctly detect and syntax highlight embedded code of a different language in

    - by D W
    I have scripts that have one-liners or sort scripts from other languages within them. How can I have LaTeX listings detect this and change the syntax formating language withing the script? This would be especially useful for awk withing bash I believe. Bash #!/bin/bash ... # usage message to catch bad input without invoking R ... # any bash pre-processing of input ... # etc echo "hello world" R --vanilla << EOF # Data on motor octane ratings for various gasoline blends x <- c(88.5,87.7,83.4,86.7,87.5,91.5,88.6,100.3, 95.6,93.3,94.7,91.1,91.0,94.2,87.5,89.9, 88.3,87.6,84.3,86.7,88.2,90.8,88.3,98.8, 94.2,92.7,93.2,91.0,90.3,93.4,88.5,90.1, 89.2,88.3,85.3,87.9,88.6,90.9,89.0,96.1, 93.3,91.8,92.3,90.4,90.1,93.0,88.7,89.9, 89.8,89.6,87.4,88.9,91.2,89.3,94.4,92.7, 91.8,91.6,90.4,91.1,92.6,89.8,90.6,91.1, 90.4,89.3,89.7,90.3,91.6,90.5,93.7,92.7, 92.2,92.2,91.2,91.0,92.2,90.0,90.7) x length(x) mean(x);var(x) stem(x) EOF perl -n -e ' @t = split(/\t/); %t2 = map { $_ => 1 } split(/,/,$t[1]); $t[1] = join(",",keys %t2); print join("\t",@t); ' knownGeneFromUCSC.txt awk -F'\t' '{ n = split($2, t, ","); _2 = x split(x, _) # use delete _ if supported for (i = 0; ++i <= n;) _[t[i]]++ || _2 = _2 ? _2 "," t[i] : t[i] $2 = _2 }-3' OFS='\t' infile Python #!/usr/local/bin/python print "Hello World" os.system(""" VAR=even; sed -i "s/$VAR/odd/" testfile; for i in `cat testfile` ; do echo $i; done; echo "now the tr command is removing the vowels"; cat testfile |tr 'aeiou' ' ' """)

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  • Django: Only one of two fields can be filled in

    - by Giovanni Di Milia
    I have this model: class Journals(models.Model): jid = models.AutoField(primary_key=True) code = models.CharField("Code", max_length=50) name = models.CharField("Name", max_length=2000) publisher = models.CharField("Publisher", max_length=2000) price_euro = models.CharField("Euro", max_length=2000) price_dollars = models.CharField("Dollars", max_length=2000) Is there a way to let people fill out either price_euro or price_dollars? I do know that the best way to solve the problem is to have only one field and another table that specify the currency, but I have constraints and I cannot modify the DB. Thanks!

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  • jQuery Autocomplete with _renderItem and catagories

    - by LillyPop
    As a newb to jQuery im wondering if its possible to have both jQuery _renderItem (for custom list item HTML/CSS) AND the categories working together in harmony? Ive got my _renderItem working great but I have no idea how to incorporate categories into the mix. My code so far $(document).ready(function () { $(':input[data-autocomplete]').each(function () { $(':input[data-autocomplete]').autocomplete({ source: $(this).attr("data-autocomplete") }).data("autocomplete")._renderItem = function (ul, item) { var MyHtml = "<a>" + "<div class='ac' >" + "<div class='ac_img_wrap' >" + '<img src="../../uploads/' + item.imageUrl + '.jpg"' + 'width="40" height="40" />' + "</div>" + "<div class='ac_mid' >" + "<div class='ac_name' >" + item.value + "</div>" + "<div class='ac_info' >" + item.info + "</div>" + "</div>" + "</div>" + "</a>"; return $("<li></li>").data("item.autocomplete", item).append(MyHtml).appendTo(ul); }; }); }); The jQuery documentation for the autocomplete gives the following code example : $.widget("custom.catcomplete", $.ui.autocomplete, { _renderMenu: function (ul, items) { var self = this, currentCategory = ""; $.each(items, function (index, item) { if (item.category != currentCategory) { ul.append("<li class='ui-autocomplete-category'>" + item.category + "</li>"); currentCategory = item.category; } self._renderItem(ul, item); }); } }); Id like to get my custom HTML (_renderItem) and categories working together, can anyone help me to merge these two together or point me in the right direction. Thanks

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  • T-SQL String Functions: difference between using Left/Right and Substring and strange behaviour

    - by TheObserver
    I am using SQL Server 2008 & 2005 (Express). I'm trying to extract part of an alpha numeric string from a varchar field. RIGHT(str_field,3) yields null values but substring(str_field, len(str_field)-2, len(str_field)) gives the right value. left(str_field,7) gives the expected values. What gives? I would have thought that RIGHT(str_field,3) and substring(str_field, len(str_field)-2, len(str_field)) are equivalent expressions.

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  • alternative to JQuery form.submit() to do ajax post

    - by BluntTool
    Hello, I have a mvc2 application with a view like this <% using (Ajax.BeginForm("UserApprove", new { id = Model.id }, new AjaxOptions() { UpdateTargetId = "statusLights", OnSuccess = "HideButtons" }, new { id = "UserApprove" })) {%> <input type="button" value="Approve" onclick="$('#dialogApprove').dialog('open')" /> <div id="dialogApprove" title="Confirm"> <p> Are you sure you want to approve this request? </p> </div> <% } %> FYI, the controller returns a partial view back. I used to not have the jquery dialog and just simple a <input type="Submit" value="Approve" /> that used to work fine I added the jquery dialog and I have something like this to initialize the dialog. $("#dialogApprove").dialog({ autoOpen: false, draggable: true, resizable: false, buttons: { "Cancel": function() { $(this).dialog("close") }, "Approve": function() { $("#UserApprove").submit(); $(this).dialog("close"); } } }); The $("#UserApprove").submit(); does not seem to be doing an ajax post. It comes back with just the text from the partial view returned in a new page. I dont want to use the jquery form plugin which has .ajaxSubmit(). Is there any other way to force an ajax post from the jquery dialog "approve" button?

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  • Asp.net grid view

    - by Manoj
    Hello @, I am nt able to edit the details in gridview. When i click on Edit link(Command Field), row editing event is fired but when i click on update link , row editing event is fired again and update event is not getting fired at all. Any suggestions ??

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  • Calling an Excel Add-In method from C# application or vice versa

    - by Jude
    I have an Excel VBA add-in with a public method in a bas file. This method currently creates a VB6 COM object, which exists in a running VB6 exe/vbp. The VB6 app loads in data and then the Excel add-in method can call methods on the VB6 COM object to load the data into an existing Excel xls. This is all currently working. We have since converted our VB6 app to C#. My question is: What is the best/easiest way to mimic this behavior with the C#/.NET app? I'm thinking I may not be able to pull the data from the .NET app into Excel from the add-in method since the .Net app needs to be running with data loaded (so no using a stand-alone C# class library). Maybe we can, instead, push the data from .NET to Excel by accessing the VBA add-in method from the C# code? The following is the existing VBA method accessing the VB6 app: Public Sub UpdateInDataFromApp() Dim wkbInData As Workbook Dim oFPW As Object Dim nMaxCols As Integer Dim nMaxRows As Integer Dim j As Integer Dim sName As String Dim nCol As Integer Dim nRow As Integer Dim sheetCnt As Integer Dim nDepth As Integer Dim sPath As String Dim vData As Variant Dim SheetRange As Range Set wkbInData = wkbOpen("InData.xls") sPath = g_sPathXLSfiles & "\" 'Note: the following will bring up fpw app if not already running Set oFPW = CreateObject("FPW.CProfilesData") If oFPW Is Nothing Then MsgBox "Unable to reference " & sApp Else . . . sheetCnt = wkbInData.Sheets.Count 'get number of sheets in indata workbook For j = 2 To sheetCnt 'set counter to loop over all sheets except the first one which is not input data fields With wkbInData.Worksheets(j) Set SheetRange = .UsedRange End With With SheetRange nMaxRows = .Rows.Count 'get range of sheet(j) nMaxCols = .Columns.Count 'get range of sheet(j) Range(.Cells(2, 2), .Cells(nMaxRows, nMaxCols)).ClearContents 'Clears data from data range (51 Columns) Range(.Cells(2, 2), .Cells(nMaxRows, nMaxCols)).ClearComments End With With oFPW 'vb6 object For nRow = 2 To nMaxRows ' loop through rows sName = SheetRange.Cells(nRow, 1) 'Field name vData = .vntGetSymbol(sName, 0) 'Check if vb6 app identifies the name nDepth = .GetInputTableDepth(sName) 'Get number of data items for this field name from vb6 app nMaxCols = nDepth + 2 'nDepth=0, is single data item For nCol = 2 To nMaxCols 'loop over deep screen fields nDepth = nCol - 2 'current depth vData = .vntGetSymbol(sName, nDepth) 'Get Data from vb6 app If LenB(vData) > 0 And IsNumeric(vData) Then 'Check if data returned SheetRange.Cells(nRow, nCol) = vData 'Poke the data in Else SheetRange.Cells(nRow, nCol) = vData 'Poke a zero in End If Next 'nCol Next 'nRow End With Set SheetRange = Nothing Next 'j End If Set wkbInData = Nothing Set oFPW = Nothing Exit Sub . . . End Sub Any help would be appreciated.

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  • Regex age verification

    - by KevinDeus
    Anyone have a good regex for Age verification? I have a date field where I am validating that what the user enters is a date. basically I wanted to figure out if that date is valid, and then further refine the date to be within x number of years Perhaps this may be too complicated to tack onto whatever I have too far, but I figured it wouldn't be. ^([1][012]|[0]?[1-9])[/-]([3][01]|[12]\d|[0]?[1-9])[/-](\d{4}|\d{2})$

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  • Select most recent records using LINQ to Entities

    - by begemotya
    I have a simple Linq to Enities table to query and get the most recent records using Date field So I tried this code: IQueryable<Alert> alerts = GetAlerts(); IQueryable latestAlerts = from a in alerts group a by a.UpdateDateTime into g select g.OrderBy(a = a.Identifier).First(); Error: NotSupportedException: The method 'GroupBy' is not supported. Is there any other way to get do it? Thanks a lot!

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  • iPhone SDK - UITextField with + Button for Contacts

    - by Isaac Waller
    Hello, In some applications like Mail, when you have a UITextField, there is a little + button to the right. When you tap it, a modal view controller comes up which you can select a phone number, address, etc from, and it will appear in the text field. I was wondering how to implement this in my own app. Thanks, Isaac

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  • jQuery date picker not persistant after AJAX

    - by ILMV
    So I'm using the jQuery date picker, and it works well. I am using AJAX to go and get some content, obviously when this new content is applied the bind is lost, I learnt about this last week and discovered about the .live() method. But how do I apply that to my date picker? Because this isn't an event therefore .live() won't be able to help... right? This is the code I'm using to bind the date picker to my input: $(".datefield").datepicker({showAnim:'fadeIn',dateFormat:'dd/mm/yy',changeMonth:true,changeYear:true}); I do not want to call this metho everytime my AJAX fires, as I want to keep that as generic as possible. Cheers :-) EDIT As @nick requested, below is my wrapper function got the ajax() method: var ajax_count = 0; function getElementContents(options) { if(options.type===null) { options.type="GET"; } if(options.data===null) { options.data={}; } if(options.url===null) { options.url='/'; } if(options.cache===null) { options.cace=false; } if(options.highlight===null || options.highlight===true) { options.highlight=true; } else { options.highlight=false; } $.ajax({ type: options.type, url: options.url, data: options.data, beforeSend: function() { /* if this is the first ajax call, block the screen */ if(++ajax_count==1) { $.blockUI({message:'Loading data, please wait'}); } }, success: function(responseText) { /* we want to perform different methods of assignment depending on the element type */ if($(options.target).is("input")) { $(options.target).val(responseText); } else { $(options.target).html(responseText); } /* fire change, fire highlight effect... only id highlight==true */ if(options.highlight===true) { $(options.target).trigger("change").effect("highlight",{},2000); } }, complete: function () { /* if all ajax requests have completed, unblock screen */ if(--ajax_count===0) { $.unblockUI(); } }, cache: options.cache, dataType: "html" }); } What about this solution, I have a rules.js which include all my initial bindings with the elements, if I were to put these in a function, then call that function on the success callback of the ajax method, that way I wouldn't be repeating code... Hmmm, thoughts please :D

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  • NHibernate dateTime as an ID Bad idea?

    - by Miau
    hi there I have an entity and it seems like using DateTime as the Id would be a good suit, however I there is this strange feeling that that it might be a terrible idea ( tho i cant come up with any logical reason as to why), This is an immutable object ( ie once the value is recorded it shouldn't really change ) So DateTime as id field in NHibernate yay or Nay? I would appreciate your comments on this

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  • How should I unit test a code-generator?

    - by jkp
    This is a difficult and open-ended question I know, but I thought I'd throw it to the floor and see if anyone had any interesting suggestions. I have developed a code-generator that takes our python interface to our C++ code (generated via SWIG) and generates code needed to expose this as WebServices. When I developed this code I did it using TDD, but I've found my tests to be brittle as hell. Because each test essentially wanted to verify that for a given bit of input code (which happens to be a C++ header) I'd get a given bit of outputted code I wrote a small engine that reads test definitions from XML input files and generates test cases from these expectations. The problem is I dread going in to modify the code at all. That and the fact that the unit tests themselves are a: complex, and b: brittle. So I'm trying to think of alternative approaches to this problem, and it strikes me I'm perhaps tackling it the wrong way. Maybe I need to focus more on the outcome, IE: does the code I generate actually run and do what I want it to, rather than, does the code look the way I want it to. Has anyone got any experiences of something similar to this they would care to share?

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