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  • MySQL Unique hash insertion

    - by Jesse
    So, imagine a mysql table with a few simple columns, an auto increment, and a hash (varchar, UNIQUE). Is it possible to give mysql a query that will add a column, and generate a unique hash without multiple queries? Currently, the only way I can think of to achieve this is with a while, which I worry would become more and more processor intensive the more entries were in the db. Here's some pseudo-php, obviously untested, but gets the general idea across: while(!query("INSERT INTO table (hash) VALUES (".generate_hash().");")){ //found conflict, try again. } In the above example, the hash column would be UNIQUE, and so the query would fail. The problem is, say there's 500,000 entries in the db and I'm working off of a base36 hash generator, with 4 characters. The likelyhood of a conflict would be almost 1 in 3, and I definitely can't be running 160,000 queries. In fact, any more than 5 I would consider unacceptable. So, can I do this with pure SQL? I would need to generate a base62, 6 char string (like: "j8Du7X", chars a-z, A-Z, and 0-9), and either update the last_insert_id with it, or even better, generate it during the insert. I can handle basic CRUD with MySQL, but even JOINs are a little outside of my MySQL comfort zone, so excuse my ignorance if this is cake. Any ideas? I'd prefer to use either pure MySQL or PHP & MySQL, but hell, if another language can get this done cleanly, I'd build a script and AJAX it too. Thanks!

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  • horizontal scrolling only!

    - by Crippletoe
    Hi all i have a that contains a HORIZONTAL menu. the menu consists of an unordered list. i would like the div to get a horizontal scroller whenever the menu exceeds the width of the <div>. i tried using these CSS definitions for my <div>: position: absolute; width: 380px; overflow: auto; overflow-y: hidden; height: 30px; but than realized that since the menu is LIST, the different list items break the line whenever they reach the width of the <div> and move on to the next line, thus the browser doesnt see the need for a horizontal scroller (it doesnt display a vertical one as well because of the overflow-y: hidden; line) any ideas how i can create a 1 line horizontal menu which will scroll horizontally only? thank you all so much.

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  • How to stretch textfield in a JasperReport as per dynamic content?

    - by Debadatta Viva la Vida
    http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="tree-template" pageWidth="595" pageHeight="842" columnWidth="481" leftMargin="57" rightMargin="57" topMargin="72" bottomMargin="72" want this field to auto stretch as per content <textField isStretchWithOverflow="true" isBlankWhenNull="true"> <reportElement positionType="Float" stretchType="RelativeToTallestObject" x="0" y="80" width="463" height="20"/> <textElement> <font size="10"/> </textElement> <textFieldExpression class="java.lang.String"><![CDATA[$F{goals}==null ? "Not Defined":$F{goals}]]></textFieldExpression> </textField> want this field to auto stretch as per content <staticText> <reportElement stretchType="RelativeToTallestObject" x="0" y="100" width="98" height="20"/> <textElement> <font isBold="true"/> </textElement> <text><![CDATA[Status Details]]></text> </staticText> <textField isStretchWithOverflow="true"> <reportElement stretchType="RelativeToTallestObject" x="2" y="120" width="463" height="20"/> <textElement/> <textFieldExpression class="java.lang.String"><![CDATA[$F{statusDetails}==null ? "Not Defined":$F{statusDetails}]]></textFieldExpression> </textField> <staticText> <reportElement stretchType="RelativeToTallestObject" x="0" y="140" width="98" height="20"/> <textElement> <font isBold="true"/> </textElement> <text><![CDATA[Risk Mitigation]]></text> </staticText> <textField> <reportElement stretchType="RelativeToTallestObject" x="18" y="160" width="463" height="20"/> <textElement/> <textFieldExpression class="java.lang.String"><![CDATA[$F{mitigation}==null?"Not Defined":$F{mitigation}]]></textFieldExpression> </textField> <textField> <reportElement stretchType="RelativeToTallestObject" x="79" y="40" width="100" height="20"/> <textElement/> <textFieldExpression class="java.lang.String"><![CDATA[new SimpleDateFormat("MMM dd,yyyy").format($F{releaseDate}.getTime())]]></textFieldExpression> </textField> <line> <reportElement x="0" y="180" width="481" height="1"/> </line> </band> </detail> <columnFooter> <band height="12" splitType="Stretch"/> </columnFooter> <pageFooter> <band height="13" splitType="Stretch"> <frame> <reportElement mode="Opaque" x="0" y="0" width="477" height="13" forecolor="#D0B48E" backcolor="#9DB1B8"/> <textField pattern="EEEEE dd MMMMM yyyy"> <reportElement style="Column header" x="2" y="0" width="197" height="13" forecolor="#FFFFFF"/> <textElement verticalAlignment="Middle"> <font size="10" isBold="false"/> </textElement> <textFieldExpression class="java.util.Date"><![CDATA[new java.util.Date()]]></textFieldExpression> </textField> <textField evaluationTime="Report"> <reportElement style="Column header" x="450" y="0" width="27" height="13" forecolor="#FFFFFF"/> <textElement verticalAlignment="Middle"> <font size="10" isBold="false"/> </textElement> <textFieldExpression class="java.lang.String"><![CDATA[" " + $V{PAGE_NUMBER}]]></textFieldExpression> </textField> <textField> <reportElement style="Column header" x="370" y="0" width="80" height="13" forecolor="#FFFFFF"/> <textElement textAlignment="Right" verticalAlignment="Middle"> <font size="10" isBold="false"/> </textElement> <textFieldExpression class="java.lang.String"><![CDATA["Page "+$V{PAGE_NUMBER}+" of"]]></textFieldExpression> </textField> </frame> </band> </pageFooter> <summary> <band splitType="Stretch"/> </summary>

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  • Index was outside the bounds of the array. IndexOutOfRangeException in LINQ to SQL

    - by gtas
    Im getting this exception in the protected virtual void SendPropertyChanged(String propertyName) { if ((this.PropertyChanged != null)) { this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); <---- HERE !!! } } of one recently table association i created, there lots of same associations around the database, and this happened in the 4 specific tables i added. Its 1...* relationship and association is Primary Table - Id (identity auto generated) Foreign PId column int not null. I just dont get it....Im using SqlMetal for generation, i regenerated the schema, rebuild, same. This is causing while inserting row in DevExpress XtraGrid, but i dont think this should be issue, same control with same functionality but for different tables works ok. I use grid's event for append value in a property when the entity creating. I disabled this but same again. Recreated the association. No change, exception occurs. Any ideas?

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  • Preview man-page without installing package.

    - by bjarkef
    Hi I've checked out some typical open source project which is using auto-tools. I want to hack a bit on this package, but I would also like to change something in the man-page of the package. The man-page source is found project-name/doc/project-name.1. I just made a small change, and now I want to preview that change, without having to actually do a make install of the project. How do I do that? I tried stuff like: man -M . 1 project-name But it does not work, neither does the various variations I have tried. This sounds like a simple problem, but I can't seem to find anything by googling on the problem, so I'm hoping someone here can help me out. Thanks.

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  • Hash of unique value = unique hash?

    - by Nebs
    Theoretically does hashing a unique value yield a unique value? Let's say I have a DB table with 2 columns: id and code. id is an auto-incrementing int and code is a varchar. If I do ... $code = sha1($id); ... and then store $code into the same row as $id. Will my code column be unique as well? What about if I append the current time? eg: $code = sha1($id . time()); Thanks.

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  • Is it possible to use best_in_place with typeahead from twitter bootstrap?

    - by Dave H
    Basically, I am using best_in_place in my rails webapp to let users edit their profile info in place. The thing is, I would like users to be presented with a typeahead form for certain entries.. Here's what I'm working with: <p>College/University: <input type="text" class="span3" style="margin: 0 auto;" data-provide="typeahead" data-items="8" data-source='["University of Pennsylvania","Harvard","Yale","Princeton","Cornell","Brown","Columbia","Dartmouth"]'></p> This gives me a working form box with typeahead. However, I want to be able to wrap this in best_in_place with something like <%= best_in_place @student, :education %> so that users only see the typeahead form when they click on the text, and upon clicking away from the box or hitting enter the selection is stored in the database. Is there a reasonably easy way to do this?

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  • VS 2010 very slow

    - by kaze
    I have just upgraded to VS 2010, and I have performance problems which I did not have before (in VS 2008). The most annoying thing is that it freezes while I work in the text editor. Sometimes when it freezes I see that it is saving auto recovery information, but not always. Almost anything I do gives an unacceptable long delay, like saving, starting to debug, ending debug session, switching between design and code view, and doing WinForms designing. I have some parts of my home directory on a mapped network drive. I suspect that that might be a part of the problem. Is it possible to configure VS 2010 to use exclusively local disk for its "internal" work perhaps? Any hints would be appreciated! Has anyone else experienced these kinds of problems?

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  • Avoiding symbol capture when using macros to generate functions (or other macros)

    - by Rob Lachlan
    I'm a bit confused as to exactly when symbol capture will occur with clojure macros. Suppose that I have a macro which defines a function from keywords. In this trivial example, (defmacro foo [keywd1 keywd2] `(defn ~(symbol (name keywd1)) [~(symbol (name keywd2))] (* 2 ~(symbol (name keywd2))))) I call (foo :bar :baz), and this gets expanded into (defn bar [baz] (* 2 baz)). So now the question -- can this lead to symbol capture? If so, under what circumstances? I know that it's preferred to use gensym (e.g. bar#) to prevent symbol capture, but in some cases (not many, but still) I'd like to have a pretty macro-expansion, without the auto-generated symbols. Bonus question: does the answer change if we are considering a macro that creates macros?

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  • Javascript upload in spite of same origin policy

    - by Brian M. Hunt
    Can one upload files to a domain other than the domain a script originates from? For example, suppose you're hosting files on www.example.com, and you want to upload files to uploads.example.com, would the following script violate the same origin policy (using uploadify): <!-- from http://www.example.com/upload.html --> <input id="fileInput" name="fileInput" type="file" /> <script type="text/javascript">// <![CDATA[ $(document).ready(function() { $('#fileInput').uploadify({ 'uploader' : 'uploadify.swf', 'script' : 'http://upload.example.com/uploadify.php', 'cancelImg' : 'cancel.png', 'auto' : true, 'folder' : '/uploads' }); }); // ]]></script> I haven't seen a clear reference on the same origin policy that would indicate one-way or the other whether the this would be an issue with any browsers.

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  • UIButton Origin and Device Orientation

    - by Ward
    Hey there, I might be crazy, but for some reason this problem is stumping me. I have a view controller that is set to auto rotate to orientation. Inside I've got two subviews. One is a uibutton. All I want is for my button's origin to stay locked to the bottom-left in portrait and bottom-right in landscape (so it basically stays in the same place). It should also stay in place for portrait upside down and landscape right. Any ideas? Thanks, Howie

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  • Iterating throgh mvc model lists using javascript

    - by kapil
    I want to iterate through my model values. Following is what I did to achieve this. But the varible count never increments. How can I increment it to iterate throgh my model values? <script language="javascript" type="text/javascript"> function AddStudentName() { var StudentName = document.getElementById('txtStudentName').value; StudentName= StudentName.replace(/^\s+|\s+$/g, ''); if(StudentName!= null) { <%int count = 0; %> for(var counter = 0; parseInt(counter)< parseInt('<%=Model.StudentInfo.Count%>',10); counter++) { alert('<%=count%>'); if('<%=Model.StudentInfo[count].StudentName%>' == StudentName) { alert("A student with new student name already exists."); return false; } <%count = count +1;%> } } } </script> thanks, Kapil

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  • identation control while developing a small python like language

    - by sap
    Hello, Im developing a small python like language using flex, byacc (for lexical and parsing) and C++, but i have a few questions regarding scope control. just as python it uses white spaces (or tabs) for identation, not only that but i want to implement index breaking like for instance if you type "break 2" inside a while loop thats inside another while loop it would not only break from the last one but from the first loop as well (hence the number 2 after break) and so on. example: while 1 while 1 break 2 end end #after break 2 it would jump right here but since i dont have an "anti" tab character to check when a scope ends (like C for example i would just use the '}' char) i was wondering if this method would the the best: i would define a global variable, like "int tabIndex" on my yacc file that i would access in my lex file using extern. then everytime i find a tab character on my lex file i would increment that variable by 1. when parsing on my yacc file if i find a "break" keyword i would decrement by the amount typed after it from the tabIndex variable, and when i reach and EOF after compiling and i get a tabIndex != 0 i would output compilation error. now the problem is, whats the best way to see if the identation got reduced, should i read \b (backspace) chars from lex and then reduce the tabIndex variable (when the user doesnt use break)? another method to achieve this? also just another small question, i want every executable to have its starting point on the function called start() should i hardcode this onto my yacc file? sorry for the long question any help is greatly appretiated. also if someone can provide an yacc file for python would be nice as a guideline (tried looking on google and had no luck). thanks in advance.

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  • Example of configuring wxStyledTextCtrl/wxScintilla control as code editor for custom language

    - by Greg
    How do you enable actions like Goto line number Find(/Replace) There don't appear to be default triggers for these actions. There are a bunch of methods on the control, but I'm missing the first step of how to get the 'events' that would trigger these. For instance, how does one hook ctrl+f or F3/Alt+F3 in the control and make them do a find? Should I be looking at each key using EVT_STC_KEY? Would also like any examples of using this control with Custom language definition (say something similar to C++, but not C++) Auto completion (basic keywords to start, or including variables)

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  • XCOPY-deploying Microsoft Sync Framework in a no admin rights scenario (i.e. ClickOnce install)

    - by Mike Bouck
    I'm currently designing a smart client app (WPF) which needs to operate in an "occasionally disconnected" mode. For the offline scenario, I'm looking at using: Disconnected Service Agent Application Block (from the Smart Client Software Factory) Microsoft Sync Framework I should mention that I want my smart client app to be XCOPY-deployable, auto-updating, and installable without administrative privledges -- basically a ClickOnce-deployed app. From what I can tell this means the Microsoft Sync Framework is out because it has some COM in it's implementation that needs to get registered on the client which requires admin rights. Is it possible to XCOPY deploy and run MSF from a ClickOnce app? Any other ideas for data synchronization?

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  • What are jQuery best practices regarding Ajax convenience methods and error handling?

    - by JonathanHayward
    Let's suppose, for an example, that I want to partly clone Gmail's interface with jQuery Ajax and implement periodic auto-saving as well as sending. And in particular, let us suppose that I care about error handling, expecting network and other errors, and instead of just being optimistic I want sensible handling of different errors. If I use the "low-level" feature of $.ajax() then it's clear how to specify an error callback, but the convenience methods of $.get(), $.post(), and .load() do not allow an error callback to be specified. What are the best practices for pessimistic error handling? Is it by registering a .ajaxError() with certain wrapped sets, or an introspection-style global error handler in $.ajaxSetup()? What would the relevant portions of code look like to initiate an autosave so that a "could not autosave" type warning is displayed if an attempted autosave fails, and perhaps a message that is customized to the type of error? Thanks,

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  • Making only the outer vector in vector<vector<int>> fixed

    - by Dennis Ritchie
    I want to create a vector<vector<int>> where the outer vector is fixed (always containing the same vectors), but the inner vectors can be changed. For example: int n = 2; //decided at runtime assert(n>0); vector<vector<int>> outer(n); //outer vector contains n empty vectors outer.push_back(vector<int>()); //modifying outer vector - this should be error auto outer_it = outer.begin(); (*outer_it).push_back(3); //modifying inner vector. should work (which it does). I tried doing simply const vector<vector<int>>, but that makes even the inner vectors const. Is my only option to create my own custom FixedVectors class, or are there better ways out there to do this?

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  • Determine the ContentObserver

    - by tommieb75
    I have this content observer that is watching on the Call Log: public class monitorCallLog extends ContentObserver{ private static final String TAG = "monitorCallLog"; public monitorCallLog(Handler handler) { super(handler); // TODO Auto-generated constructor stub } @Override public boolean deliverSelfNotifications() { return false; } @Override public void onChange(boolean selfChange){ Log.v(TAG, "[onChange] *** ENTER ***"); super.onChange(selfChange); // Code goes in here to handle the job of tracking.... Log.v(TAG, "[onChange] *** LEAVE ***"); } } Now... how can I determine the nature of the change on this URI content://call_log/calls? I want to check on it if a deletion has occurred on the said URI... but there is no way of knowing...this seems to apply on a query/delete/insert/update on said URI that triggers the onChange method.... any tips/suggestions?

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  • Trying to integrate Jeditable+MarkItUp and Thickbox/Lightbox

    - by Bob Sawyer
    I've managed to successfully integrate MarkItUp with Jeditable based on the instructions on those two sites. What I would really like to do, however, is to have the Jeditable/MarkItUp editing window appear in a Thickbox or Lightbox overlay. So far my attempts to do this have not been successful. So, at the moment, I have the standard code: $.editable.addInputType('markitup', { element : $.editable.types.textarea.element, plugin : function(settings, original) { $('textarea', this).markItUp(settings.markitup); } }); $(".editme").editable("/content/save", { event : 'dblclick', type : 'markitup', submit : 'OK', cancel : 'Cancel', width : 640, height : 'auto', tooltip : 'Double-click to edit...', onblur : 'ignore', markitup : mySettings }); I've found other posts here that show how to trigger the edit box by clicking on a link rather than the object itself, and I've tried integrating that with the Thickbox calls, to no avail. Would appreciate anyone pointing me in the right direction. Thanks!

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  • flash player: usage

    - by Syom
    i use Adobe flash player in my site, and now i need to increment some filed in database, when user click on player. here is the script <div id="conteiner" style="text-align: center;" ></div> <script type="text/javascript"> var s1 = new SWFObject("player.swf","ply","420","380","9","#FFFFFF"); s1.addParam("allowfullscreen","true"); s1.addParam("allowscriptaccess","always"); s1.addParam("flashvars","file=<?=$video ?>"); s1.write("conteiner"); </script> i deside to use ajax for it, but how can i write a function in the flash object? thanks in advance UPDATE: i only have the swfobject.js file, which contains such data if(typeof deconcept=="undefined"){var deconcept=new Object();} if(typeof deconcept.util=="undefined"){deconcept.util=new Object();} if(typeof deconcept.SWFObjectUtil=="undefined"){deconcept.SWFObjectUtil=new Object();}deconcept.SWFObject=function(_1,id,w,h,_5,c,_7,_8,_9,_a){if(!document.getElementById){return;}this.DETECT_KEY=_a?_a:"detectflash";this.skipDetect=deconcept.util.getRequestParameter(this.DETECT_KEY);this.params=new Object();this.variables=new Object();this.attributes=new Array();if(_1){this.setAttribute("swf",_1);}if(id){this.setAttribute("id",id);}if(w){this.setAttribute("width",w);}if(h){this.setAttribute("height",h);}if(_5){this.setAttribute("version",new deconcept.PlayerVersion(_5.toString().split(".")));}this.installedVer=deconcept.SWFObjectUtil.getPlayerVersion();if(!window.opera&&document.all&&this.installedVer.major>7) ... and the player.swf, and the html, i've shown allready. i don't now is this flash player or no, and what can i do?

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  • Build Procedure

    - by sarah xia
    Hi all, My company is putting auto build and deploy procedure in place. What we are doing now is checking out source code from svn and specify the source folder in Ant script. Is it the right way? Can we omit the exporting process and build directly from SVN? Another question is to do with versioning. At the moment, we are creating a tag whenever there is a release and then use the tag number to name the build product, which will be shipped to a client's site. I've done search on the Internet and here and it seems the correct way to name a product is like this: x.y.z.revision. However, our company is quite small and the client always want quick changes and releases. I would like to know what the drawbacks of only using tag number to name the product? And what would be the best approach for small companies like us? Thankyou, Sarah

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  • Sublime Text LaTeXTools console autohide

    - by DCh
    The build script in the LaTeXTools plugin for Sublime Text editor pops up the console, where the result of the compilation is written. I would like the console to auto-hide once the compilation is finished and there are no errors (and to stay open otherwise). I knew how to achieve this with Sublime Text 2. (I think I inserted two lines sublime.active_window().run_command("show_panel", {"panel": "console", "toggle": True})) somewhere in the build script.) How to achieve this behavior with Sublime Text 3? How to (properly) achieve this behavior with Sublime Text 2?

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  • text indexes vs integer indexes in mysql

    - by imanc
    Hey, I have always tried to have an integer primary key on a table no matter what. But now I am questioning if this is always necessary. Let's say I have a product table and each product has a globally unique SKU number - that would be a string of say 8-16 characters. Why not make this the PK? Typically I would make this field a unique index but then have an auto incrementing int field as the PK, as I assumed it would be faster, easier to maintain, and would allow me to do things like get the last 5 records added with ease. But in terms of optimisation, assuming I'd only ever be matching the full text field and next doing text matching queries (e.g. like %%) can you guys think of any reasons not to use a text based primary key, most likely of type varchar()? Cheers, imanc

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  • treeview and postback

    - by Luis
    hi I have a treeview, and already the javascript code to postback the page. Because when i select the father , auto-select the children. this is my html code <script> function foo() { var o = window.event.srcElement; if (o.tagName == "INPUT" && o.type == "checkbox") { __doPostBack("",""); } } </script> <asp:TreeView ID="HierarchicalTreeView" runat="server" OnSelectedNodeChanged="HierarchicalTreeView_SelectedNodeChanged" ShowLines="True" ExpandImageToolTip="Fechar &quot;{0}&quot;" CollapseImageToolTip="Fechar &quot;{0}&quot;" ExpandDepth="1" OnTreeNodeCheckChanged="HierarchicalTreeView_TreeNodeCheckChanged" EnableClientScripts="true" onClick="foo()"> <NodeStyle CssClass="text" /> <SelectedNodeStyle CssClass="text" Font-Bold="true" /> </asp:TreeView> How can i prevent from postback all page, and only the treeview???, so dont 'refresh' the page

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  • Alternative to Turbo C

    - by Asad Jibran Ahmed
    My university is hosting a Programming Competition, and have decided to support Turbo C (the 16-bit DOS version) as a valid programming environment. I have just read that PC^2, the software that is going to be used to auto-judge the competition, does not support 16-bit programs. So, is there any alternative to Turbo C that I can use. I need the same header files, and the compiler would need to support all the outdated C standards that Turbo C supports. But the output needs to be 32-bit. Is there any compiler that can satisfy these conditions?

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