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  • "Multi-threading" w/ NSTimers in an iPhone app

    - by MrDatabase
    Say I have two NSTimers in my iPhone app: timer1 and timer2. timer1 calls function1 30 times per second and timer2 calls function2 30 times per second. Assume these two functions are reading and updating the same integer variables. Are there any "multi-threading" issues here? If not how does iPhone OS handle the execution of the two functions (in general)?

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  • nonparametric regression method using R

    - by user1782652
    I need to find the certain driver variables for unit sales & their impact on sales. My data is such data the error does not follow normal distribution & the unit sales is also not following any particular statistical distribution. Given such condition, it is difficult for me to use simple liner regression or GLM. Can any of you please suggest me some non parametric regression technique which I can use in R to model the relationship? Thanks,

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  • problem with IN clause in SQL

    - by user179056
    Hello, We have observed that there seems to be a maximum number of ids/variables which one can pass in the IN clause of SQL as comma seperated values. To avoid this we are storing all the ids in a table and doing a SELECT within the IN clause. This however means extra database operations to store and retrieve ids. Is there any other way to use IN without SELECT? regards Sameer

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  • Is this a correct syntax (c code found on wikipedia)?

    - by m4design
    I just found this code on wikipedia. Link: http://en.wikipedia.org/wiki/Sizeof#Use The code: /* the following code illustrates the use of sizeof * with variables and expressions (no parentheses needed), * and with type names (parentheses needed) */ char c; printf("%zu,%zu", sizeof c, sizeof(int)); It states that: "The z prefix should be used to print it, because the actual size can differ on each architecture." I tried it on my compiler, but it gives the following result: 'zu,zu'

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  • How can I split a list with multiple delimiters?

    - by Rob
    Basically, I want to enter text into a text area, and then use them. For example variable1:variable2@variable3 variable1:variable2@variable3 variable1:variable2@variable3 I know I could use explode to make each line into an array, and then use a foreach loop to use each line separately, but how would I separate the three variables to use?

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  • Android 2.1 switch loop JRE 1.7

    - by Defuzer
    Hello how to use switch loop in my android project ? I want to use Android 2.1 I need JRE 1.7, but I want to use Android 2.1 I use loop like this: switch ((CHAR[Math.abs(intGen.nextInt()%2)])) { case "+": result = random2 + random3; break; case "-": result = random2 + random3; break; } LogCat: Cannot switch on a value of type String for source level below 1.7. Only convertible int values or enum variables are permitted

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  • GridBagConstraints weightx and weighty values

    - by xdevel2000
    In many books weightx and weighty values are expressed in different ways: some says 0.0 to 1.0 other says 0 to 100 other say until 1000 I'm a lot confused. In the API these variables are double types so I think the first is correct but what does it meaning a value of 0.4 or 0.7? are percentage values, point values? relative of what?

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  • Java xml binding with wrong xmlns attribute name

    - by Tom Brito
    When I use the annotation: @XmlRootElement(name="RootElement", namespace="namespace") class RootElement { to create xml file from java, it creates the root element as: <ns2:RootElement xmlns:ns2="namespace"> but I wanted to create without the "ns2", like: <RootElement xmlns="namespace"> Any idea how to fix it? Reletad link (example I used to create the xml): http://www.java2s.com/Code/JavaAPI/javax.xml.bind.annotation/XmlRootElementname.htm

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  • Passing data between asp.net pages

    - by user204588
    Hello, I'm wondering the opinion of what is the best way to pass a lot of values between pages. I was thinking of either saving the values to a database, using context.Items[], or Session[]. I'm not sure about what is the best method. I'm passing probably around 40 variables.

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  • Submitting form with links and jquery

    - by Eagletrophy
    Me again, I have a question I would like to ask as a followup. to submit a form using a link powered by jquery is what I am curious about. do I just bind a click event to the link in the live() event for eg and use a submit() added to the click? God bless

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  • How to call a PHP class member function from a Java file?

    - by Jack
    I am using PHP/Java bridge to run PHP scripts on the Tomcat server. Can someone point me to an example as to how to call my PHP scripts from a Java file. <?php class X{ //variables //functions } ?> Now I want to call the member functions of class X using its object via a Java file. How do I do this?

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  • Extracting data from a text file to use in a python script?

    - by Rob
    Basically, I have a file like this: Url/Host: www.example.com Login: user Password: password How can I use RegEx to separate the details to place them into variables? Sorry if this is a terrible question, I can just never grasp RegEx. So another question would be, can you provide the RegEx, but kind of explain what each part of it is for?

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  • Best way to save to nsuserdefaults for custom class?

    - by cannyboy
    If I have a custom class Person which has three variables (which are propertized and synthesized): NSString* theName; float* theHeight; int theAge; Person instances are stored in an NSArray 'Group'. There is only one Group. What is the best way of string and loading the Group in NSUserDefaults? (bearing in mind that float and int are not legal for NSUserDefaults)

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  • Understanding PHP's way of reading if statements

    - by Masi
    How does PHP read if statements? I have the following if statements in this order if ( $number_of_figures_in_email < 6) { -- cut: gives false } if($number_of_emails > 0) { -- cut: gives false } if ( $number_of_emails == 0) { -- cut: gives true } The code behaves randomly. It sometimes goes to the third if clause and gives me a success, while sometimes to the one of the first two if clauses when the input variables are constant. This suggests me that I cannot code only with if statements.

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  • Thread safety with heap-allocated memory

    - by incrediman
    I was reading this: http://en.wikipedia.org/wiki/Thread_safety Is the following function thread-safe? void foo(int y){ int * x = new int[50]; /*...do some stuff with the allocated memory...*/ delete x; } In the article it says that to be thread-safe you can only use variables from the stack. Really? Why? Wouldn't subsequent calls of the above function allocate memory elsewhere?

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  • is this class thread safe?

    - by flash
    consider this class,with no instance variables and only methods which are non-synchronous can we infer from this info that this class in Thread-safe? public class test{ public void test1{ // do something } public void test2{ // do something } public void test3{ // do something } }

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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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  • is there a way to inject privileged methods after an object is constructed?

    - by patrickgamer
    I'm trying to write fully automated unit tests in JavaScript and I'm looking for a way to read some private variables in various JS functions. I thought I recalled a way to inject privileged members into a function/object (and found an overwhelming occurrence of "no such thing as private in JS") and yet I can't find any resources indicating how. I'm trying to read through the properties of .prototype but if there's a way, someone out here would know where to direct me faster than I'd find on my own. Thanks

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