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  • Is JSON.stringify() reliable for serializing JSON objects?

    - by Colin
    I need to send full objects from Javascript to PHP. It seemed pretty obvious to do JSON.stringify() and then json_decode() on the PHP end, but will this allow for strings with ":" and ","? Do I need to run an escape() function on big user input strings that may cause an issue? What would that escape function be? I don't think escape works for my purposes. Are there any downsides to JSON.stringify() I need to know about? Thanks

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  • Can I someone point to me what I did wrong? Trying to map VB to Java using JNA to access the library

    - by henry
    Original Working VB_Code Private Declare Function ConnectReader Lib "rfidhid.dll" () As Integer Private Declare Function DisconnectReader Lib "rfidhid.dll" () As Integer Private Declare Function SetAntenna Lib "rfidhid.dll" (ByVal mode As Integer) As Integer Private Declare Function Inventory Lib "rfidhid.dll" (ByRef tagdata As Byte, ByVal mode As Integer, ByRef taglen As Integer) As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim desc As String desc = "1. Click ""Connect"" to talk to reader." & vbCr & vbCr desc &= "2. Click ""RF On"" to wake up the TAG." & vbCr & vbCr desc &= "3. Click ""Read Tag"" to get tag PCEPC." lblDesc.Text = desc End Sub Private Sub cmdConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdConnect.Click If cmdConnect.Text = "Connect" Then If ConnectReader() Then cmdConnect.Text = "Disconnect" Else MsgBox("Unable to connect to RFID Reader. Please check reader connection.") End If Else If DisconnectReader() Then cmdConnect.Text = "Connect" End If End If End Sub Private Sub cmdRF_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdRF.Click If cmdRF.Text = "RF On" Then If SetAntenna(&HFF) Then cmdRF.Text = "RF Off" End If Else If SetAntenna(&H0) Then cmdRF.Text = "RF On" End If End If End Sub Private Sub cmdReadTag_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdReadTag.Click Dim tagdata(64) As Byte Dim taglen As Integer, cnt As Integer Dim pcepc As String pcepc = "" If Inventory(tagdata(0), 1, taglen) Then For cnt = 0 To taglen - 1 pcepc &= tagdata(cnt).ToString("X2") Next txtPCEPC.Text = pcepc Else txtPCEPC.Text = "ReadError" End If End Sub Java Code (Simplified) import com.sun.jna.Library; import com.sun.jna.Native; public class HelloWorld { public interface MyLibrary extends Library { public int ConnectReader(); public int SetAntenna (int mode); public int Inventory (byte tagdata, int mode, int taglen); } public static void main(String[] args) { MyLibrary lib = (MyLibrary) Native.loadLibrary("rfidhid", MyLibrary.class); System.out.println(lib.ConnectReader()); System.out.println(lib.SetAntenna(255)); byte[] tagdata = new byte[64]; int taglen = 0; int cnt; String pcepc; pcepc = ""; if (lib.Inventory(tagdata[0], 1, taglen) == 1) { for (cnt = 0; cnt < taglen; cnt++) pcepc += String.valueOf(tagdata[cnt]); } } } The error happens when lib.Inventory is run. lib.Inventory is used to get the tag from the RFID reader. If there is no tag, no error. The error code An unexpected error has been detected by Java Runtime Environment: EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0b1d41ab, pid=5744, tid=4584 Java VM: Java HotSpot(TM) Client VM (11.2-b01 mixed mode windows-x86) Problematic frame: C [rfidhid.dll+0x141ab] An error report file with more information is saved as: C:\eclipse\workspace\FelmiReader\hs_err_pid5744.log

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  • ImageMagick: convert png fail via PHP and works via bash shell

    - by wedix
    I've got a very weird bug which I've yet to find a solution. UPDATE see solution below What I am trying to do is convert a full size picture into a 160x120 thumbnail. It works great with jpg and jpeg files of any size, but not with png. ImageMagick command: /opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png' PHP function (shortened) ... $cmd = "/opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png'"; exec($cmd, $output, $retval); $errors += $retval; if ($errors > 0) { die(print_r($output)); } When this function runs $retval equal 1 which means the convert command failed (thumbnail isn't created). This is where it gets interesting, if I run the exact same command in my shell, it works. wedbook:~ wedix$ /opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png' wedbook:~ wedix$ I've tried using different PHP function such as system, passthru but it didn't work. I thought maybe someone here knew the solution. I'm using MAMP 1.7.2 Apache/2.0.59 PHP/5.2.6 Thanks! UPDATE I updated the following dependencies libpng from 1.2.35 to 1.2.37 libiconv from 1.12_2 to 1.13_0 ImageMagick 6.5.2-4_1 to 6.5.2-9_0 However, it did not fix my problem. 2nd UPDATE I finally found something that might help, when the function runs this is what gets printed in the Apache logs: dyld: Library not loaded: /opt/local/lib/libiconv.2.dylib Referenced from: /opt/local/bin/convert Reason: Incompatible library version: convert requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 3rd UPDATE libiconv.2.dylib is version 8.0.0... bash-3.2$ otool -L /opt/local/lib/libiconv.2.dylib /opt/local/lib/libiconv.2.dylib: /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4) 4th UPDATE Problem was related to MAMP, see solution below

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  • Changing code at runtime

    - by Pagis
    I have a pointer to a function (which i get from a vtable) and I want to edit the function by changing the assembler code (changing a few bytes) at runtime. I tried using memset and also tried assigning the new value directly (something like mPtr[0] = X, mPtr[1] = Y etc.) but I keep getting segmentation fault. How can I change the code? (I'm using C++)

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  • Entity Framework 4.0: Why Would One Use the Code Generated EntityObjects Over POCO Objects?

    - by senfo
    Aside from faster development time (Visual Studio 2010 beta 2 has no T4 templates for building POCO entity objects that I'm aware of), are there any advantages to using the traditional EntityObject entities that Entity Framework creates, by default? If Microsoft delivers a T4 template for building POCO objects, I'm trying to figure out why anybody would want to use the traditional method.

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  • Objective C override %@ for custom objects

    - by nickcartwright
    Hey there, I'd like to override the default print function in NSLog for custom objects; For example: MyObject *myObject = [[MyObject alloc] init]; NSLog(@"This is my object: %@", myObjcet); Will print out: This is my object: <MyObject: 0x4324234> Is there a function I override in MyObject to print out a prettier description? Cheers! Nick.

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  • AJAX URL request doesn't work from desktop

    - by Aaron
    Running this simple AJAX with WAMP localhost I can pull JSON from a web address. $(document).ready(function(){ $.ajax({ url: 'http://time.jsontest.com/', dataType: 'jsonp', success: function(json) { console.log(json); } }); }); However I cannot connect if I try running normally through a browser, why is that? Google CDN: <src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">

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  • Importing a SQL Server 2005 Profile Trace Template into SQL 2008

    - by David Stein
    I'm using SQL Server 2008, but my ERP Vendor only offers a SQL 2005 trace template that they'd like me to run on my system. When I attempt to import it, I receive confirmation that it was successfully imported. However, it does not show up in the list of available templates. I've done this on two separate servers to the same effect. Is this a known problem with SQL Server 2008? I Googled unsuccessfully.

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  • Start-Job Problems

    - by laerte-junior
    Hi all, Why this code not works ? function teste { begin { function lala { while ($true){ "JJJJ" | Out-File c:\Testes\teste.txt -Append } } } process { Start-Job -ScriptBlock {lala} } }

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  • Ajax request with JQuery on page unload

    - by Rob
    I'm trying to do this: $(window).unload( function () { $.ajax({ type: "POST", url: "http://localhost:8888/test.php?", data: "test", success: function(msg){ alert( "Data Saved: " + msg ); } }); alert (c); }); However, the success alert is never shown, nor does this request seem to be even hitting the server. What am I doing wrong? Thanks!

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  • Execute Assembly from Pascal

    - by London
    How can I execute this code from Pascal : MOV EAX, variable1 PUSH EBX, EAX MOV EAX, variable2 POP EBX AND EBX, EAX Where I define method/function arguments in function(variable1, variable2). This is a school assignment I don't know why they are making us do Pascal/Assembly instead of Java/C++ or such. This is not the whole assignment I did do plenty of work before I just need help with this, any help is appreciated thank you

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  • How to merge jquery autocomplete and fcbkListSelection functionality?

    - by Ben
    Initial caveat: I am a newbie to jquery and javascript. I started using the autocomplete jquery plugin recently from bassistance.de. Yesterday, I found the fcbkListSelection plugin (http://www.emposha.com/javascript/fcbklistselection-like-facebook-friends-selector.html) and am using it to include a selector in my application. What I now want to do is to merge the 2 pieces of functionality since there are lots of items in my selector list. To be more specific, I want to put a "Filter by Name" text box above the facebook list selection object in my html. When the user types a few characters into the "Filter by Name" text box, I want the items in the Facebook list selector to only show the items that contain the typed characters -- kind of like what autocomplete does already, but rather than the results showing below the text input box, I want them to dynamically update the facebook list object. Is this possible and relatively straightforward? If so, can somebody please describe how to do it? If not, is there an easier way to approach this? Thanks! OK, to Spencer Ruport's comment, I guess I may have a more specific question already. Below is the current Javascript in my HTML file (angle brackets represent Django tags). #suggest1 and #fcbklist both do their separate pieces, but how do I get them to talk to each other? Do I need to further write javascript in my HTML file, or do I need to customize the guts of the plugins' .js? Does this help elaborate? $(document).ready(function() { var names = []; var count = 0; {% for a, b, c in friends_for_picker %} names[count] = "{{ b }}"; count = count+1; {% endfor %} function findValueCallback(event, data, formatted) { $("<li>").html( !data ? "No match!" : "Selected: " + formatted).appendTo("#result"); } function formatItem(row) { return row[0] + " (<strong>id: " + row[1] + "</strong>)"; } function formatResult(row) { return row[0].replace(/(<.+?>)/gi, ''); } $("#suggest1").autocomplete(names, { multiple: true, mustMatch: false, autoFill: true, matchContains: true, }); //id(ul id),width,height(element height),row(elements in row) $.fcbkListSelection("#fcbklist","575","50","4"); });

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  • jquery getting post action url

    - by bandhunt
    I'm trying to access the post target action in a jquery function. example: <form action="/page/users" id="signup" method="post"> I'd like to access the "action" part - "/page/users" in this case. $('#signup').live("submit", function(event) { // get this submitted action } Seems like I'm missing something very simple. I see the value in the dom but don't know where it's stored in jquery. Thanks!

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  • Javascript check if it has passed midnight since a certain time

    - by Jonah
    I need to create a javascript function that checks if it has been a day since timeX (an instance of Date). I do NOT mean whether is has been 24 hours since timeX, but instead whether it has passed a midnight since timeX. I am a PHP expert, not a JavaScript one, so I was wondering if anyone here had any quick answers. Thanks! function(dateLast, dateNow) {...}

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  • JavaScript check if anonymous object has a method

    - by Baddie
    How can I check if an anonymous object that was created as such: var myObj = { prop1: 'no', prop2: function () { return false; } } does indeed have a prop2 defined? prop2 will always be defined as a function, but for some objects it is not required and will not be defined. I tried what was suggested here: http://stackoverflow.com/questions/595766/how-to-determine-if-native-javascript-object-has-a-property-method but I don't think it works for anonymous objects .

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  • detect click inside iframe

    - by ismal
    i wanna detect click INSIDE iframe not onclick on iframe itself i tried onclick event u must click on iframe itself to trigger function i even tried addeventlistener to window or document nothing work as if the iframe isn't there the function never triger when i click inside iframe :( plz help

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  • matplotlib analog of R's `pairs`

    - by bgbg
    R has a useful function pairs that provides nice matrix of plots of pairwise connections between variables in a data set. The resulting plot looks similar to the following figure, copied from this blog post: Is there any ready to use function based on python's matplolib? I have searched its gallery, but couldn't find anything that resembles what I need. Technically, this should be a simple task, but proper handling of all the possible cases, labels, titles, etc is very tedious.

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  • Is it possible to pass the value in php file using Ajax.Request?

    - by user309381
    function reload(form) { var val = $('seltab').getValue(); new Ajax.Request('Website.php?$cat = val', { method:'post', onSuccess: function(transport){ ..... code in php: echo "<select id = seltab onchange='reload(this.form)'>"; $querysel = "SELECT title_id,author FROM authors NATURAL JOIN books"; $result1 = mysql_query($querysel) ; while($rowID = mysql_fetch_assoc($result1)) {

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  • PHP - Read number of dirs and then require for each a specified file name

    - by Max
    Hello, I want to make a little script but I'm rather n00b in php so please help me if you can :) What I want the script to do is: I have "index.php". I want "index.php" to read the sub-directories from a known folder, let's say "templates/" Each sub-directory will contain a file called "content.html". The index will then load the "content.html" with the require() function for each of the existing sub-directories. Thank you very much for your help!

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  • can you explain this jquery method from jquery.js

    - by mrblah
    Trying to understand how jquery works under the covers, what's the difference between: jQuery.fn and jQuery.prototype jQuery = window.jQuery = window.$ = function( selector, context ) { // The jQuery object is actually just the init constructor 'enhanced' return new jQuery.fn.init( selector, context ); }, and then: jQuery.fn = jQuery.prototype = { init: function( selector, context ) {

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  • winform - login form template

    - by BhejaFry
    Hi folks, new to winform development. I am trying to add a 'login form' to my project in vs2008 but the template is missing. When i do 'add new item', i don't see 'login form'. However i do see mainform, aboutbox form templates. TIA

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  • Calling javascript class within other Js

    - by harigm
    I have Aptana plugin in eclipse, I have a javascript (one.js) and i have included one more Javscript(two.js) within one.js. I click on any functions within one.js and if those functions exists in the same one.js, the control is going to the respective function. Suppose if the function exists in two.js, the control is not going to two.js Can any one help me with this?

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  • PHP Trasnlate HTML page using google translate

    - by John Jones
    Afternoon, Bit of a tricky question this one, I have a website and need to translate the pages into french, I am using google translate API to do the translation. What I am doing is loading in the HTML templates into a string using PHP and then need to translate the text copy on the pages and then save as for example: fr_master_header.html de_master_header.html The problem I have is identifying the text copy on the page ignoring the HTML, replacing the copy in the extact place and then saving the file with the HTML tags and trasnlated text copy. Cheers in advanced.

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