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  • How can I extract a range of lines from a text file on unix?

    - by Adam J. Forster
    I have a ~23000 line sql dump containing several databases worth of data. I need to extract a certain section of this file (i.e. the data for a single database) and place it in a new file. I know both the start and end line numbers of the data that I want. Does anyone know a unix command (or series of commands) to extract all lines from a file between say line 16224 and 16482 and then redirect them into a new file?

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  • Hibernate (JPA) Entity with Static collection as a member

    - by Kyle Partridge
    Is it possible to have a static collection as a member of a hibernate entity? Say I have an object Question: public class Question { private String category; ... } Would it be possible to populate a static Set<String> that is a distinct set of all categories in the Database? I know I could just query this, but I was wondering if there was a more elegant solution, as it seems like something that other people may have come across.

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  • Java API Method Run Times

    - by Mike
    Is there a good resource to get run times for standard API functions? It's somewhat confusing when trying to optimize your program. I know Java isn't made to be particularly speedy but I can't seem to find much info on this at all. Example Problem: If I am looking for a certain token in a file is it faster to scan each line using string.contains(...) or to bring in say 100 or so lines putting them to a local string them performing contains on that chunk.

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  • Can I Define Exceptions to Eclipse cleanup rules?

    - by Henrik Paul
    Most often the cleanup rules (Preferences Java Code Style Clean Up) in Eclipse work perfectly and create nice-looking code. But sometimes, especially with comments and concatenated string snippets (like inline SQL queries), the cleanup just messes things up, and destroys my formatting. Is there a way to say to Eclipse "Don't touch this block of text! I have formatted it just the way I like, and you would make it just less readable"?

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  • Use reflection to get the value of a property by name in a class instance

    - by TheMoot
    Lets say I have class Person { public Person(int age, string name) { Age = age; Name = name; } public int Age{get;set} public string Name{get;set} } and I would like to create a method that accepts a string that contains either "age" or "name" and returns an object with the value of that property. Like the following pseudo code: public object GetVal(string propName) { return <propName>.value; } How can I do this using reflection? I am coding using asp.net 3.5, c# 3.5

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  • Stopping other subs from running while in a Sub

    - by Bigfatty
    Is there a way to stop other subs from running while in a separate sub. for instance say your in the sub CreateNumber() and the subs are setup like CreateNumber() AddNumber() DeleteNumber() Is there a way to be in CreateNumber() and call a function to stop AddNumber from running after creaetNumber() is finished? i just want my program to sit there to wait for an event to happen.

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  • cakephp redirecting to wrong relative address (htaccess?)

    - by jay
    Hi All: I have an issue with not getting the correct relative url. Right now, say my home page is at (please ignore quotation) "http://www.foo.com/user/home" I have links on the homepage that should go to "http://www.foo.com/user/home/page1" but right now I'm getting "http://www.foo.com/page1" Everything worked locally, can this be fixed with modifying .htaccess and how? Thank you.

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  • How to disable an input with jQuery Validation Plugin

    - by Eelke
    This should be really simple but I can't get it to work, how do I disable and add a class to an input? Let's say I've got an input field with id = name, this is how far I got, $("input#name").attr("disabled"); What am I doing wrong here? Any help would be greatly appreciated, thanks in advance!

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  • Regarding address operator C/C++

    - by iSight
    Hi, What does address operator mean. say in the method below. what should be passed in the method as parameter value of integer or the address of an integer variable. void func1(int&)// method declaration void func1(int& inNumber)//method definition { //some code }

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  • What to prefer in the following case?

    - by GK
    say suppose I have class as : public class Age { private int age; public int getAge() { return this.age; } } In my Main class I am calling the getAge() method many times. So I wanted to know is it advisable to call so many times or call once and assign it to some variable and use that variable. Which is best and why?

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  • C++ static array leading to memory leak?

    - by MDonovin
    Lets say I have something like... void foo() { char c[100]; printf("this function does nothing useful"); } When foo is called, it creates the array on the stack, and when it goes out of scope, is the memory deallocated automatically? Or is c destroyed, but the memory remains allocated, with no way to access it/get it back except restarting the computer?

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  • Javascript delete cookie next day

    - by Clint
    Hi, I was wonder if you can delete a cookie at the beginning of the next day. Lets say I log in to a website at 1:30pm and use it again throughout the day but at midnight or 1 minute past, in the new day, the cookie is removed. Many thanks for any help, C

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  • Globbing in `git checkout`

    - by yar
    Is there any way to implement globbing in git checkout? It would be great to be able to use git checkout re* or even to have tab completion in the shell. I'm using zsh, but an answer that is shell independent would be great. Note: I realize that this is kind of a pipe dream, so... if I needed to implement this myself, must it be done in the shell language itself, or could it be done in, say, Ruby?

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  • R equivalent of SELECT DISTINCT on two or more fields/variables

    - by wahalulu
    Say I have a dataframe df with two or more columns, is there an easy way to use unique() or other R function to create a subset of unique combinations of two or more columns? I know I can use sqldf() and write an easy "SELECT DISTINCT var1, var2, ... varN" query, but I am looking for an R way of doing this. It occurred to me to try ftable coerced to a dataframe and use the field names, but I also get the cross tabulations of combinations that don't exist in the dataset: uniques <- as.data.frame(ftable(df$var1, df$var2))

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  • Nhiberate, multiple tables, same class

    - by jeff
    It's been asked a million times, its like this. Say Invoice is the base class and InvoiceHistory is the class that simply inherits from Invoice. When I do something like invoiceList = session.CreateCriteria(typeof(Invoice)).List(); I get everything from Invoice (that I want, plus everything from InvoiceHistory). Do I need to have an InvoiceBase and create derived versions for Invoice and InvoiceHistory?

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  • access parametrically values of variables inside environments

    - by Apostolos
    Let's say we have one or more environments and variables in them. My question is how we access the values of these variables, parametrically. rm(list = ls()) env1 <- new.env() env1$var1 <- "value1" env2 <- new.env() env2$var2 <- "value2" env <- ls.str(mode="environment") # We get the environments var <- ls.str(eval(parse(text = env[1])))# We get the variables of an environment eval(var[1]) # We fail to get the value of a variable Thank you all, in advance

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  • How to figure out if two CGRect intersect?

    - by mystify
    In -drawRect: I want to check if the provided rect intersects with anotherRect. I'm not good at this geometry math stuff and especially at english so what I want to say is: If you have two sheets of paper on the desk, and one of them covers the other either completely or just a small portion, it is rectsIntersect = YES. How to check that out for rect and anotherRect?

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  • Get last/newly added element in std::set

    - by Dave17
    can you get the last or newly added element in std::set? for example say if the loop runs to collect the elements to fill in the std::set. if on the first run the set was, [0] "A" [1] "B" [2] "D" and, on second run, the set becomes [0] "A" [1] "B" [2] "C" [3] "D" How would you check if 'C' is the new element that was added?

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