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  • php: avoiding __get in certain circumstances?

    - by user151841
    I have a class where I'm using __set. Because I don't want it to set just anything, I have an array of approved variables that it checks before it will actually set a class property. However, on construct, I want the __construct method to set several class properties, some of which are not in the approved list. So when construct happens, and I do $this->var = $value, I of course get my exception that I'm not allowed to set that variable. Can I get around this somehow?

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  • Why use one dimensional array instead of a two dimensional arrray?

    - by user3869145
    I was doing some work handling a lot of information and my partner told me that I was using too many matrices to manipulate the variables of the problem. The idea was to use one dimension arrays int a[] instead of the 2 dimensional arrays int b[][], to save memory and processing speed of the algorithm. How certain is that this change will accelerate the speed of execution or compilation of my code in c ++?

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  • MySQLi - Should every statement be prepared?

    - by Kerry
    I know its supposed to improve performance and clean strings, but lets say there are no variables? Might just be a SELECT COUNT( `column` ) AS count FROM `table` Should that be prepared? Is there any case that a SELECT statement should not be prepared?

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  • how do i use @var on a function variable?

    - by fayer
    i've got a variable $user that is of data type User (a class). i've got it in a class method so i can't just type: /** * @var User */ $user = Factory::getInstance('User'); because that will work only with class properties, not method variables like in this case. how could i tell netbeans that that variable is of data type User in a method? Thanks!

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  • Stop a user directly accesing a page

    - by James Jeffery
    I have a page called create.php. It receives post variables and sets up accounts. I don't want that page to be accessible by a user. What's the conventional way of achieving this? I think I remember reading something about including a page with a CONSTANT. If the CONSTANT is not present the page has been accessed directly. I think Wordpress also do it.

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  • Storing Formatted Data in C

    - by rangerdanger16
    Im trying to add variables to a C char array. Also I have tried sprintf, but it is causing a few other issues within my program. I am looking to do something like this: char* age = "My age is = " + age; I am planning on sending the char array to a socket using send() Thanks

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  • Parsing groupings of strings (Python)

    - by j00niner
    I have a string that looks something like this: [["Name1","ID1","DDY1", "CALL1", "WHEN1"], ["Name2","ID2","DDY2", "CALL2", "WHEN2"],...]; This string was taking from a website. Their can be any amount of groupings. How could I parse this string and print just the Name variables of each grouping?

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  • how to search a string in structure variable ( C# )

    - by deep
    public struct Items { public string Id; public string Name; } public Items[] _items = null; if (_items.Contains("Table")) { // i need to check the structure and need to return correponding id } and am having a list of variables in my structure variable... i need to search a Name in the structure(_items) and i want to return the Corresponding Id. how to do this,

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  • How to use an excel data-set for a multi-line ggplot in R?

    - by user1299887
    I have a data set in excel that I am trying to create a multiple line plot with on R. The data set contains 7 food groups and the calories consumed daily associated to the groups. As well, there is that set of data over 38 years (from 1970-2008) and I am attempting to use this data set to create a multiple line plot on R. I have tried for hours on end but can not seem to get R to recognize the variables within the data set.

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  • Creating a string variable name from the value of another string

    - by NeonGlow
    In my bash script I have two variables 'CONFIG_OPTION' and 'CONFIG_VALUE' which contain string VENDOR_NAME and Default_Vendor respectively. I need to create a variable with name '$CONFIG_OPTION' ie VENDOR_NAME and assign the value in CONFIG_VALUE to newly created variable. How I can do this? I tried $CONFIG_OPTION=$CONFIG_VALUE But I am getting an error on this line as './Build.bash: line 137: VENDOR_NAME="Default_Vendor": command not found' Thanks.

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  • How can I scale movement physics functions to frames per second (in a game engine)?

    - by Richard
    I am working on a game in Javascript (HTML5 Canvas). I implemented a simple algorithm that allows an object to follow another object with basic physics mixed in (a force vector to drive the object in the right direction, and the velocity stacks momentum, but is slowed by a constant drag force). At the moment, I set it up as a rectangle following the mouse (x, y) coordinates. Here's the code: // rectangle x, y position var x = 400; // starting x position var y = 250; // starting y position var FPS = 60; // frames per second of the screen // physics variables: var velX = 0; // initial velocity at 0 (not moving) var velY = 0; // not moving var drag = 0.92; // drag force reduces velocity by 8% per frame var force = 0.35; // overall force applied to move the rectangle var angle = 0; // angle in which to move // called every frame (at 60 frames per second): function update(){ // calculate distance between mouse and rectangle var dx = mouseX - x; var dy = mouseY - y; // calculate angle between mouse and rectangle var angle = Math.atan(dy/dx); if(dx < 0) angle += Math.PI; else if(dy < 0) angle += 2*Math.PI; // calculate the force (on or off, depending on user input) var curForce; if(keys[32]) // SPACE bar curForce = force; // if pressed, use 0.35 as force else curForce = 0; // otherwise, force is 0 // increment velocty by the force, and scaled by drag for x and y velX += curForce * Math.cos(angle); velX *= drag; velY += curForce * Math.sin(angle); velY *= drag; // update x and y by their velocities x += velX; y += velY; And that works fine at 60 frames per second. Now, the tricky part: my question is, if I change this to a different framerate (say, 30 FPS), how can I modify the force and drag values to keep the movement constant? That is, right now my rectangle (whose position is dictated by the x and y variables) moves at a maximum speed of about 4 pixels per second, and accelerates to its max speed in about 1 second. BUT, if I change the framerate, it moves slower (e.g. 30 FPS accelerates to only 2 pixels per frame). So, how can I create an equation that takes FPS (frames per second) as input, and spits out correct "drag" and "force" values that will behave the same way in real time? I know it's a heavy question, but perhaps somebody with game design experience, or knowledge of programming physics can help. Thank you for your efforts. jsFiddle: http://jsfiddle.net/BadDB

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  • Why do @synthesize variable names begin with an _?

    - by mcjoejoe0911
    I'm just starting to use Objective-C and I need to clarify something When I @synthesize a @property, it is common convention to do the following: @interface Class : ParentClass @property propertyName @end @implementation @synthesize propertyName = _propertyName; @end I've seen plenty of questions and answers suggesting that "_propertyName" is widely accepted as the "correct" way to synthesize properties. However, does it serve ANY purpose? Or is it merely to increase readability and identify instance variables?

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  • How to ignore %% from being evaluated?

    - by murxx
    Hi, one of my variables has the value %val% - this is exactly the name! So: set variable=%val% What happens now is that when running the script the variable will be set to nothing as the %val% is being evaluated! But this is not what I want... How can I tell DOS to ignore the %-sign here? Can anybody out there help me with my question? Thanks a lot...

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  • Teamcity build agent gives 504 gateway timeout

    - by Anthony
    I have a new teamcity build agent machine, which when started up tries to connect to the build server and fails. It never shows up in the connected, disconnected or unauthorised agents tabs of the build server web interface. The logs on the build agent show that it fails to connect with a 504 gateway timeout. This is from teamcity-agent.log [2012-09-04 15:34:59,776] INFO - buildServer.AGENT.registration - Registering on server http://10.0.10.16, AgentDetails{Name='my-local', AgentId=null, BuildId=null, AgentOwnAddress='10.0.1.14', AlternativeAddresses=[10.0.10.32], Port=8080, Version='21424', PluginsVersion='21424-md5-somechecksum', AvailableRunners=[ABunchOfPlugins], AvailableVcs=[SomeRunners], AuthorizationToken='sometoken'} [2012-09-04 15:35:53,606] WARN - buildServer.AGENT.registration - Call http://10.0.10.16/RPC2 buildServer.registerAgent3: org.apache.xmlrpc.XmlRpcClientException: Server returned incorrect status code: 504 Gateway Time-out [2012-09-04 15:35:53,606] WARN - buildServer.AGENT.registration - Connection to TeamCity server is probably lost. Will be trying to restore it. Take a look at logs/teamcity-agent.log for details (unless you're using custom logging). (I have edited some identifying data out of this log excerpt) But I can reach the build server. In fact, tracert shows that it is very nearby. Tracing route to TEAMCITYSERVER [10.0.10.16] over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms 10.0.2.1 2 <1 ms <1 ms <1 ms TEAMCITYSERVER [10.0.10.16] Trace complete. I can see a teamcity login page if I hit http://10.0.10.16 in the browser. The teamcity service is logging in as the same (local administrator) account as I used to log in and test the network. The build agent is a windows 2008 server VM hosted on Ubuntu 12.04 under Oracle VirtualBox. I have disabled firewalls on both the Windows and Ubuntu machines. Other VMS with similar configuration can connect fine and do not report this error. What can possibly be preventing this connection?

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  • TSM Backup Fails with VSS

    - by user176320
    Since we rebuilt our servers to windows servers 2008 x64 r2 we have perpetual problems with scheduled backup (shadow copy). In the Application event log, the following events are logged on both nodes: The description for Event ID 4112 from source TsmVssPlugin cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. If the event originated on another computer, the display information had to be saved with the event. The following information was included with the event: VSS processing encountered error 'VSS_E_UNEXPECTED_PROVIDER_ERROR' in the Volume Shadow Copy API 'AddToSnapshotSet'. For more information, see the IBM Tivoli Storage Manager client error log. Re installing TSM didn't change anything and still logging same events. TSM Error log file shows following: ANS1327W The snapshot operation for 'C:' failed with error code: -1. ANS5250E An unexpected error was encountered. TSM function name : BaStartSnapshot TSM function : initializeSnapshotSet() failed, check Microsoft Application event log for VSS errors TSM return code : -1

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  • Mapping Drive Error - System Error 1808

    - by Julian Easterling
    A vendor is attempting to map and preserve a network drive using nt authority/system; so it stays persistent when the interactive session of the server is lost. They were able to do this on one server (Windows 2008 R2) but not a second computer (also Windows 2008 R2). D:\PsExec.exe -s cmd.exe PsExec v1.98 - Execute processes remotely Copyright (C) 2001-2010 Mark Russinovich Sysinternals - www.sysinternals.com Microsoft Windows [Version 6.1.7600] Copyright (c) 2009 Microsoft Corporation. all rights reserved. C:\Windows\system32>whoami nt authority\system C:\Windows\system32>net use New connections will be remembered. Status Local Remote Network -------------------------------------------------------------------- OK X: \\netapp1\share1 Microsoft Windows Network The command completed successfully. C:\Windows\system32>net use q: \\netapp1\share1 System error 1808 has occurred. The account used is a computer account. Use your global user account or local user account to access this server. C:\Windows\system32> I am unsure on how to set up a "machine account mapping" which will preserve the drive letter of the Netapp path being mapped, so that the service account running a Windows service can continue to access the share after interactive logon has expired on the server. Since they were able to do this on one server but not another, I'm not sure how to troubleshoot the problem? Any suggestions?

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