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• Is it possible to add headers to emails being sent by app-engine?

  - by Peter Farmer

  I'm currently putting the finishing touches to an application for a client, this application sends daily emails to subscribers, is it possible to add custom headers to the email so that certain variables can be tracked, like day number (X-Day-Number) etc...

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• How would someone implement mathematical formulae in java?

  - by Mohit Deshpande

  What I mean is like have to user input a string with multiple variables and get the value of those variable. Like a simple quadratic formula: x^2 + 5x + 10. Or in java: (Math.pow(x,2)) + (x * 5) + 10The user would then enter that and then the program would solve for x. I will be using the BeanShell Interpreter class to interpret the string as an equation. But how would I solve for x?

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• What are the benefits of using properties internally?

  - by cyclotis04

  Encapsulation is obviously helpful and essential when accessing members from outside the class, but when referring to class variables internally, is it better to call their private members, or use their getters? If your getter simply returns the variable, is there any performance difference?

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• information hiding in python

  - by ali

  in python tutorial added that python cannot hide its attributes from other classes. some thing such as private data in C++ or java..But also i know that we can use _ or __ to set some variables as privated one but it is not enogh. I think it is a week if it is not any thing to do it.

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• Connect to web-service/API in MySQL?

  - by Jesse Figueroa

  I'm creating a sql based procedure which can Accept a table load the values one at a time send the variables to a remote API Record the response of the API Write the response to a table for viewing later I have successfully implemented 1,2, and 5. I am hoping there may be some way of choosing an address to contact and for SQL to listen too for a response. Please let me know if you have any suggestions!

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• C++ conversion from string to object identifier

  - by 104250004363501275012

  I'm writing a program in C++ that reads in some data from an external file in order to set the values of static variables. Is it possible to convert a string to an object identifier? (e.g. convert the string "CheckBox::Unchecked" into and identifier for the object CheckBox::unchecked)

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• Run 2 threads in ruby at the same time

  - by Arcath

  Is there some way to run 2 threads at the same time? i want to have my app run its current function and then bring up another thread running another function, that can change variables in the first thread

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• Jquery return mulitple values in ajax call

  - by Scarface

  Hey guys quick question, I have a jquery post function that returns a response on success after the click of a div, however I would like to return multiple variables on success. Do I have to use JSON, and if so, is it possible to integrate it into the $.ajax function after success? Thanks in advance for your time. $.ajax({ type: "POST", data: "action=favorite&username=" + username + "&topic_id=" + topic_id + "&token=" + token, url: "favorite.php", success: function(response) { } });

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• CodeIgniter - accessing $config variable in view

  - by PHP thinker

  Pretty often I need to access config variables in views. I know I can pass them from controller to load-view(). But it seems excessive to do it explicitly. Is there some way or trick to access $config variable from CI views without disturbing controllers with spare code?

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• Log files legal aspect?

  - by relwarc

  I like data. That is why I add a standalone PHP script which logs all relevant HTTP variables like: Date of visit IP User-agent Request URI Referer Am I allowed to store all this in non-public text files? Am I allowed to evaluate the data? What am I allowed to do with the log files? Do I have to delete them after some time?

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• How do I transfer a javascript value to a php variable?

  - by motboys

  I have an html table containing values that are being generated from javascript. How do I transfer those values to php variables?

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• Problems with usually short solutions to test in a programming language

  - by sub

  I'm currently creating an experimental programming language for fun and educational purpose and in search for some tasks beyond the classical "Hello, World!"-program. I've already come up with these ideas: Print out the program's input Calculator Generate Prime numbers, Fibonacci series What other interesting programming problems do you have for me to test? It would be good if they required the language to solve a broad spectrum of task, take prime numbers for example: You need variables, increment them, divide them, perform actions under certain conditions, etc.

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• How to format given string using regex?

  - by icoolninja

  So I have defined variables in such a way in my file: public static final String hello_world = "hello world" public static final String awesome_world = "awesome world" public static final String bye_world= "bye world" I have many declarations like that. Is it possible to format them as(All '=' in a line): public static final String hello_world = "hello world" public static final String awesome_world = "awesome world" public static final String bye_world = "bye world" I can't even think of a way to do it. Any kind of help is appreciated. P.S If it matters, I use sublime text 2.

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• Using CompareTo() on different .NET types (e.g. int vs. double)

  - by Yossin

  Hi, I've got a static method that accepts two object type variables and runs the CompareTo() method: public static int Compare(Object objA, Object objB) { return (((IComparable)objA).CompareTo(objB)); } Problem is that CompareTo() throws an exception when trying to compare between different types (e.g. int and double). Does any one know of a better way in C#, to compare between two different types? Or a workaround to this problem? Thanks

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• Is this the best approach using generics to check for nulls

  - by user294747

  public static T IsNull<T>(object value, T defaultValue) { turn ((Object.Equals(value,null)) | (Object.Equals(value,DBNull.Value)) ? defaultValue : (T)value); } public static T IsNull<T>(object value) where T :new() { T defaultvalue = new T(); return IsNull(value, defaultvalue); } Have tested, and can use against data objects, classes and variables. Just want to know if there is better way to go about this.

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• Why can we have static final members but cant have static method in an inner class ?

  - by user275131

  Why can we have static final members but cant have static method in an inner class ? Can we access static final member variables of inner class outside the outer class without instantiating inner class ?

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• Best way to initialise / clear a string variable cocoa

  - by Spider-Paddy

  I have a routine that parses text via a loop. At the end of each record I need to clear my string variables but I read that someString = @"" actually just points to a new string & causes a memory leak. What is the best way to handle this? Should I rather use mutable string vars and use setString:@"" between iterations?

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• Dual or triple (or even multiple) comparison in JavaScript

  - by Maxja

  Almighty Gurus, Please tell me, I want to know can comparison sm. set of variables in row, like this: x < y >= z or i need to do it in two step? (x < y) && (y >= z)

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• When knowledge of "multithreading" is specified in a C++ job description, what is the expectation?

  - by Vaibhav Khattri

  I understand it should cover threading primitives (mutex, semaphore, condition variables etc.) plus design patterns (such as those specified in POSA2). But what's more? Every project has its own multithreading scenarios and one may have not dealt with those that the job is expecting?. So how does one build their knowledge and prove that they have the ability?

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• C++ Pointer to a function which takes an instance of a templated class as argument

  - by Nils

  I have trouble compiling a class, which has function pointers as member variables. The pointers are to functions which take an instance of a class as argument. Like template<class T, int N> double (*f)(Vector<T,N> v); I get "error: data member 'f' cannot be a member template" Compiler is gcc 4.2.

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• What's the simplest way to get the highest and lowest keys from a dictionary?

  - by Jorge

  self.mood_scale = { '-30':"Panic", '-20':'Fear', '-10':'Concern', '0':'Normal', '10':'Satisfaction', '20':'Happiness', '30':'Euphoria'} I need to set two variables: max_mood and min_mood, so I can put some limits on a ticker. What's the easiest way to get the lowest and the highest keys?

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• Why does a programming language need keywords?

  - by eSKay

  For example (in C): int break = 1; int for = 2; Why will the compiler have any problems at all in deducing that break and for are variables here?

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• How to rip specific data from an HTML file?

  - by SnirD

  Hi, so I have multiple HTML files which I need to get some praticular data from, I mean theres a bunch of non relative information in this HTML files, but I need just lets say things that are between the <div class="myInfo"> and </div>, after getting this information I want to handle it in my own PHP page, so for example I can insert this data into some variables. Is it even possible using PHP only? (Forgive me for my English mistakes)

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• How to display records below form on submission in php without the use of database?

  - by OM The Eternity

  How to make the use of hidden variables as array for consecutive submission of data so that they can be used to display the records list. I have a form with 4 text fields and a file upload field.. as i submit he form it should get appended to the list which needs to be displayed below the form, such that these values are NOT stored in the DB.. So in this case how can i use the post array to collect the data and display in the list below?

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• windows keydown listeners in C

  - by numerical25

  I am having a very hard time finding resources that talk about the windows message system. Mainly the keydown constant variables. I need to know what const varibles I need to listen for all keypress especially the arrow keys for C

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