Search Results

Search found 251490 results on 10060 pages for 'integer overflow'.

Page 131/10060 | < Previous Page | 127 128 129 130 131 132 133 134 135 136 137 138  | Next Page >

  • Rails 3.0 method_missing: undefined method in validator

    - by user567592
    == Schema Information Schema version: 20110111000403 # Table name: places # id :integer not null, primary key name :string(255) latitude :float longitude :float a place can be defined by latitude and longitude or by name # class Place < ActiveRecord::Base validates_precence_of :name, :if = lat_long_not_def? def lat_long_not_def? latitude.blank? || longitude.blank? end end

    Read the article

  • best alternative to in-definition initialization of static class members? (for SVN keywords)

    - by Jeff
    I'm storing expanded SVN keyword literals for .cpp files in 'static char const *const' class members and want to store the .h descriptions as similarly as possible. In short, I need to guarantee single instantiation of a static member (presumably in a .cpp file) to an auto-generated non-integer literal living in a potentially shared .h file. Unfortunately the language makes no attempt to resolve multiple instantiations resulting from assignments made outside class definitions and explicitly forbids non-integer inits inside class definitions. My best attempt (using static-wrapping internal classes) is not too dirty, but I'd really like to do better. Does anyone have a way to template the wrapper below or have an altogether superior approach? // Foo.h: class with .h/.cpp SVN info stored and logged statically class Foo { static Logger const verLog; struct hInfoWrap; public: static hInfoWrap const hInfo; static char const *const cInfo; }; // Would like to eliminate this per-class boilerplate. struct Foo::hInfoWrap { hInfoWrapper() : text("$Id$") { } char const *const text; }; ... // Foo.cpp: static inits called here Foo::hInfoWrap const Foo::hInfo; char const *const Foo::cInfo = "$Id$"; Logger const Foo::verLog(Foo::cInfo, Foo::hInfo.text); ... // Helper.h: output on construction, with no subsequent activity or stored fields class Logger { Logger(char const *info1, char const *info2) { cout << info0 << endl << info1 << endl; } }; Is there a way to get around the static linkage address issue for templating the hInfoWrap class on string literals? Extern char pointers assigned outside class definitions are linguistically valid but fail in essentially the same manner as direct member initializations. I get why the language shirks the whole resolution issue, but it'd be very convenient if an inverted extern member qualifier were provided, where the definition code was visible in class definitions to any caller but only actually invoked at the point of a single special declaration elsewhere. Anyway, I digress. What's the best solution for the language we've got, template or otherwise? Thanks!

    Read the article

  • Can I use an "IN" filter on an Advantage Database Table (TAdsTable)?

    - by Anthony
    I want to apply a filter to an advantage table using multiple values for an Integer field. The equivalent SQL would be: SELECT * FROM TableName WHERE FieldName IN (1, 2, 3) Is it possible to do the same on an AdsTable within having to repeat the field using an "OR"? I want to something like: Filter := 'FieldName IN (1, 2, 3)' Instead of: Filter := 'FieldName = 1 OR FieldName = 2 OR FieldName = 3'

    Read the article

  • Symfony: how would you reverse the "notnull:true" in a schema of a plugin?

    - by user248959
    Hi, sfGuardUser model of sfDoctrineGuardPlugin is defined this way: sfGuardUser: actAs: [Timestampable] columns: id: type: integer(4) primary: true autoincrement: true username: type: string(128) notnull: true unique: true As you can see 'username' has the feature "notnull:true". Now i want to create a register form that is not using 'username' but the email address of the user. When a user wants to register, it is showed this: Validation failed in class sfGuardUser 1 field had validation error: * 1 validator failed on username (notnull) Any idea? Javi

    Read the article

  • How do i escape reserve names in a column? MySQL/Create Table

    - by acidzombie24
    I am generating tables from classes in .NET and one problem is a class may have a field name key which is a reserved mysql keyword. How do i escape it in a create table statement? (Note: The other problem below is text must be a fixed size to be indexed/unique) create table if not exists misc_info ( id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL, key TEXT UNIQUE NOT NULL, value TEXT NOT NULL)ENGINE=INNODB;

    Read the article

  • simple interview question

    - by calvin
    Input integer array: a[8] = { a1, a2, a3, a4, b1, b2, b3, b4 } Output array: a[8] = { a1, b1, a2, b2, a3, b3, a4, b4 } Forget all corner cases, make sure your solution works for any int array of size 2n. You can use one or two temp variables for looping or anything, but you shouldn't use any temp arrays/stacks/queues etc to store entire array or part of array. I'm able to get answer in O(n*log n), but I'm looking for better solution.

    Read the article

  • Random Int in VB.Net

    - by brendan
    I need to generate random integer between 1-n (where n is a positive whole number) to use for a unit test. I don't need something overly complicated to ensure true randomnesses - just an old fashioned random number. How would I do that?

    Read the article

  • C++ function dynamic data type definition

    - by user330352
    Hi all, in C++, when you define a function which takes one argument, you have to define the data type of that variable: void makeProccess(int request) However, I want to implement a function which takes different data types rather taking statically defined integer type. void makeProccess(anyType request) How can I design a proccess like this, any idea? Thanks.

    Read the article

  • HashMap.containsValue - What's the point?

    - by Frederik
    I've got a HashMap and I need to fetch an item by its integer value. I notice there's a containsValue() function, but it would appear I still have to iterate through the map to find the correct index anyway. My question is; why use containsValue() if I'm required to traverse it afterwards? Also, am I missing the point completely? ;-)

    Read the article

  • Retrieving the first digit of a number

    - by Michoel
    Hi, I am just learning Java and am trying to get my program to retrieve the first digit of a number - for example 543 should return 5, etc. I thought to convert to a string, but I am not sure how I can convert it back? Thanks for any help. int number = 534; String numberString = Integer.toString(number); char firstLetterChar = numberString.charAt(0); int firstDigit = ????

    Read the article

  • How can I pass information between 2 different View Controllers?

    - by sagiftw
    Hi, This is a simple question: I have 2 different view controllers, and each one has its own data stored in its .m file. I want to take a value, for instance, an integer value (int i=3;) that is declared in ViewController1 and pass it to ViewController2, so I will be able to use that value in the second view controller. Can anyone please tell me how to do it? Thanks in advance, Sagiftw

    Read the article

  • SQL - Add up all row-values of one column in a singletable

    - by ThE_-_BliZZarD
    Hello Everybody, I've got a question regarding a SQL-select-query: The table contains several columns, one of which is an Integer-column called "size" - the task I'm trying to perform is query the table for the sum of all rows (their values), or to be more exact get a artifical column in my ResultSet called "overallSize" which contains the sum of all "size"-values in the table. Preferable it would be possible to use a WHERE-clause to add only certain values ("WHERE bla = 5" or something similar). The DB-engine is HSQLDB (HyperSQL), which is compliant to SQL2008. Thank you in advance :)

    Read the article

  • Persistent Hashing of Strings in Python

    - by Chris S
    How would you convert an arbitrary string into a unique integer, which would be the same across Python sessions and platforms? For example hash('my string') wouldn't work because a different value is returned for each Python session and platform.

    Read the article

  • Are there any "gotchas" to watch for in using a Class (object) within itself?

    - by Clay Nichols
    I've got a Registry class and there are a few Registry values that I want to access from within that Registry class. (There is a bit of a calculation with these values so I thought I'd just put all that code right in the Registry Class itself). So we might have something within our RegistryRoutine.cls like: Function GetMyValue() as integer Dim R as new RegistryRoutine <calculations> GetMyValue=R.GetRegisetryValue (HKEY, key, value, etc.) End Function

    Read the article

  • Haskell: list of elements with class restriction

    - by user1760586
    here's my question: this works perfectly: type Asdf = [Integer] type ListOfAsdf = [Asdf] Now I want to do the same but with the Integral class restriction: type Asdf2 a = (Integral a) => [a] type ListOfAsdf2 = (Integral a) => [Asdf2 a] I got this error: Illegal polymorphic or qualified type: Asdf2 a Perhaps you intended to use -XImpredicativeTypes In the type synonym declaration for `ListOfAsdf2' I have tried a lot of things but I am still not able to create a type with a class restriction as described above. Thanks in advance!!! =) Dak

    Read the article

  • Mysql ADDDATE() or DATE_ADD() with table columns?

    - by John
    How do I do something like the following SELECT ADDDATE(t_invoice.last_bill_date, INTERVAL t_invoice.interval t_invoice.interval_unit) FROM t_invoice ...where the column t_invoice.last_bill_date is a date, t_invoice.interval is an integer and t_invoice.interval_unit is a string. Basically, I want to determine a person's next bill date based on his desired billing frequency. Is there a better way to achieve this?

    Read the article

< Previous Page | 127 128 129 130 131 132 133 134 135 136 137 138  | Next Page >