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  • appendChild + createElement

    - by user317005
    what's the difference between var div = document.createElement('div');//output -> [object HTMLDivElement] document.getElementById('container').appendChild(div); and var div = '<div></div>'; document.getElementById('container').appendChild(div);//output -> <div></div> shouldn't both be the same? and if not, how do i get the 2nd version to work?

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  • Base64url and Base64 facebook

    - by Shekhar_Pro
    I have actually 2 questions: 1)What is the difference between base64url encoding and base64 encoding and 2)How base64url encode is different from Facebooks base64url encode because facebook mentions that it sends url in a form of base64url but with no padding and two different characters. http://developers.facebook.com/docs/authentication/canvas (under Why Sign calls) Can anyone plese provide a pseudocode with explaination for converting to and from each other.

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  • Can I play any Buffer only once at a given time?

    - by mystify
    From the OpenAL documentation: The basic OpenAL objects are a Listener, a Source, and a Buffer. There can be a large number of Buffers, which contain audio data. Each buffer can be attached to one or more Sources My problem is, that I have one sound file which I need to play multiple times per second, at the same time. The sound is 2 seconds long. So it will overlap. Would I need multiple filled buffers for this (= multiple times that sound in memory)? If I would attach one Buffer to multiple Sources, would I be able to play the sound 10 times, overlapping itself, with just one copy in memory? Or would I still have to deal with 10 copies of that sound in memory?

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  • NUL symbol gets inserted anywhere in the XML

    - by Racs
    I am using Oracle 11g and when I query data from database manually, it looks ok. But when I view it using Notepad++, there is a special character that gets inserted anywhere in the xml produced. Please see image below: I tried everything and deleted some parts of the xml, updated the db and query again but the invalid character just differ in location. Any idea is much appreciated, thanks! Best regards, Racs

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  • Java / MySQL - How to access connection from another class?

    - by Alex
    I'm just getting my head around java (and OOP for that matter), the only thing I am familiar with is MySQL. I need to keep the DB connection open throughout the duration of the application, as well as a server socket. I'm not even sure if they both need separate classes, but here's what I have so far: http://pastebin.com/qzMFFTrY (it wouldn't all go in a code tag) The variable I need is con for line 86.

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  • What is the proper design of storing temporary users? [closed]

    - by Mendy
    In SO site both real users and temporary users can add a new questions. I assume each user type has a different table. My question is how can I attach the question to the right user? I assuming the temp users have their own table from the following reasons: Temp users don't have all the data that real users have. like: email, password, and all users details. On the other hand, temp users are a lot more then real users. So it make more sense to have they in their own table.

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  • Generate Delete Statement From Foreign Key Relationships in SQL 2008 ?

    - by Element
    Is it possible via script/tool to generate a delete statement based on the tables fk relations. i.e. I have the table: DelMe(ID) and there are 30 tables with fk references to its ID that I need to delete first, is there some tool/script that I can run that will generate the 30 delete statements based on the FK relations for me ? (btw I know about cascade delete on the relations, I can't use it in this existing db) I'm using Microsoft SQL Server 2008

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  • How can I use Javascript to access sub-elements?

    - by Steve
    I am dynamically creating forms dynamically according to a users actions. It is an entry-box and a two "buttons" for each instance. Each instance will be wrapped in a unique div tag. What I tried to do without success is when I dynamically create the "button" I attach a function with the input variable containing the div of its instance. This a brief excerpt: var newDivClass = document.getElementById("instance"+1); button1.innerHTML = "<a href=\"#\" onclick=\"buttons("+newDivClass+");\" id=\"button1\"> Button1 </a>"; function buttons(selected) { //I want this to select the first instance //of button1 found within div newDivClass selected.getElementById("button1"); //I also tried //this.getElementById("button1"); //selected.getChildren[0]; } The problem appears to be in passing newDivClass to the the actual function.

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  • Tracking image views - PHP

    - by RS7
    I'd like for my app to be able to tell if an image hasn't been viewed in the last 30 days and remove it (along with data in the DB associated with it). I know you can have PHP read and output the image dynamically but I've heard its quite taxing on the system. Is there a way to for me to track these hits even when the image is viewed directly? (would htaccess be able to do this?) Thanks in advance.

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  • Django - problem with {% url facebook_xd_receiver %}

    - by Gaurav
    I'm using {% url facebook_xd_receiver %} in one of my HTML files. This works just fine when I run my project using the command python manage.py runserver But the same project stops running and gives me a "TemplateSyntaxError" at the line {% url facebook_xd_receiver %} Can anyone please tell me what could be the difference between the dev server run through the command line and the apache server. Is there anything I'm missing out on while configuring the Apache server? Or is it a Django problem?

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  • MySQL Can't Handle Parameters for Stored Procedures

    - by Takkun
    I'm trying to make a stored procedure but it doesn't seem to be recognizing the parameters I've given it. Procedure create procedure test_pro(IN searchTable VARCHAR(55)) begin select * from searchTable limit 10; end // Trying to execute mysql> call test_pro('exampleTable'); ERROR 1146 (42S02): Table 'db.searchTable' doesn't exist It isn't replacing the searchTable with the parameter that is passed in.

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  • Is it possible to create a link that acts like a button and can carry out a function when clicked?

    - by Tim
    In PHP, I want to execute a function when a hyperlink is clicked. The only way I can think of doing this is by having the link attach a get parameter to the url when clicked and by doing an if statement that checks to see if that parameter exists and if so then have the function executed. But is there a way to do this like: <a href='#' onclick='<?php functionName(); ?>'> Obviously there are a million things wrong with this example but is it possible in any other way?

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  • How to make two different files (with their contents) equal using command in linux shell?

    - by user2617138
    How to make two different files (their contents) equal using terminal in Linux? Suppose i have a file A in which the content is Hello world and i have a file B in which the content is Hello worlds. Now we find the difference between the 2 files using the diff or sdiff utility. Now i want to append the contents of the 2 different files into a single file or make the two different files (their contents) equal using terminal or any other utility.

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  • Socket operation on non-socket

    - by embedded
    I'm running mysql5 on Mac os x 10.5.8 and got this error. How do I solve this? The DB worked fine but stopped working after system update. I think its something related to the socket file which is /tmp/mysql.sock do I need to give it special permissions and owner? Thanks

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  • Indexing on only part of a field in MongoDB

    - by Rob Hoare
    Is there a way to create an index on only part of a field in MongoDB, for example on the first 10 characters? I couldn't find it documented (or asked about on here). The MySQL equivalent would be CREATE INDEX part_of_name ON customer (name(10));. Reason: I have a collection with a single field that varies in length from a few characters up to over 1000 characters, average 50 characters. As there are a hundred million or so documents it's going to be hard to fit the full index in memory (testing with 8% of the data the index is already 400MB, according to stats). Indexing just the first part of the field would reduce the index size by about 75%. In most cases the search term is quite short, it's not a full-text search. A work-around would be to add a second field of 10 (lowercased) characters for each item, index that, then add logic to filter the results if the search term is over ten characters (and that extra field is probably needed anyway for case-insensitive searches, unless anybody has a better way). Seems like an ugly way to do it though. [added later] I tried adding the second field, containing the first 12 characters from the main field, lowercased. It wasn't a big success. Previously, the average object size was 50 bytes, but I forgot that includes the _id and other overheads, so my main field length (there was only one) averaged nearer to 30 bytes than 50. Then, the second field index contains the _id and other overheads. Net result (for my 8% sample) is the index on the main field is 415MB and on the 12 byte field is 330MB - only a 20% saving in space, not worthwhile. I could duplicate the entire field (to work around the case insensitive search problem) but realistically it looks like I should reconsider whether MongoDB is the right tool for the job (or just buy more memory and use twice as much disk space). [added even later] This is a typical document, with the source field, and the short lowercased field: { "_id" : ObjectId("505d0e89f56588f20f000041"), "q" : "Continental Airlines", "f" : "continental " } Indexes: db.test.ensureIndex({q:1}); db.test.ensureIndex({f:1}); The 'f" index, working on a shorter field, is 80% of the size of the "q" index. I didn't mean to imply I included the _id in the index, just that it needs to use that somewhere to show where the index will point to, so it's an overhead that probably helps explain why a shorter key makes so little difference. Access to the index will be essentially random, no part of it is more likely to be accessed than any other. Total index size for the full file will likely be 5GB, so it's not extreme for that one index. Adding some other fields for other search cases, and their associated indexes, and copies of data for lower case, does start to add up, which I why I started looking into a more concise index.

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