similar to: [LLVMdev] Dynamic Type Lookup ...

On 24 Apr 2013, at 23:13, Frank White <frankwhite1003 at gmail.com> wrote: > Hello everyone, I would like to implement functionality something like the following in my sample language..... > {snipped not very informative C++ pseudocode.} > I assume that I will need: > > - some type of runtime lookup table to store the class structure of Class A and B. That depends on

Thanks for your feedback David.... Yes, the intention is to support duck-typing. In my code example, a.attrB1 = 5 .... is probably more accurately stated as ..... a. attr1.attrB1 = 5 Certainly this would be an unsafe call because we would not know that attrB1 is an attribute of attr1 until runtime. I believe this type of call is valid in a language like Python. Are there any

Dear R experts, I would really appreciate if you had an idea on how to use more efficiently the aggregate method: More specifically, I would like to calculate the mean of certain values on a data frame,? grouped by various attributes, and then create a new column in the data frame that will have the corresponding mean for every row. I attach part of my code: matchMean <-

Consider: > x <- matrix(1:6, 2,3) > rownames(x) <- c("ID1", "ID2") > colnames(x) <- c("Attr1", "Attr2", "Attr3") > x Attr1 Attr2 Attr3 ID1 1 3 5 ID2 2 4 6 > write.csv(x,file="x.csv") "","Attr1","Attr2","Attr3" "ID1",1,3,5

In R-devel (svn 49628) and back to at least R 2.7.0 we get inconsistent results when attempting to attach attributes to a variable with the value NULL. If we use attributes<- it finishes but changes the value to list(). > a<-NULL > attributes(a)<-list(attr1="First attribute", attr2=2+2i) > a list() attr(,"attr1") [1] "First

Hi, I have 100000 units with 10 attributes (attr1, attr2, attr3, etc...) For instance: unit attr1 attr2 attr3 ... 1 a ww 12 2 a re 11 3 b ww 09 4 c yt 02 5 a qw 02 ... I'd like to answer to the question: a) what are the most frequent combinations of attributes? b) How could I describe the relations

Hi, I''ve started looking at ticket 90<http://merb.devjavu.com/projects/merb/ticket/90>and there are a couple of situations that the current implementation doesn''t cater for. 1. Tag Attributes are wiped out. - <tag1 attr1=''1''>Content</tag1> #=> { "tag1" => "Content" } - I think it should return -

Ok, So, I''ve got two data tables associated through a foreign key. class Child < ActiveRecord::Base belongs_to :parent, :class => Parent, :foreign_key => "parent_id" # also has attr1, attr2 end class Parent < ActiveRecord::Base has_many :children, :class => Child, :foreign_key => "parent_id" end So, I''m trying to build the new/edit

When I use rbind() or rbind.data.frame() to add a row to an existing dataframe, it appears that attributes for the column of type "factor" are dropped. See the sample example below to reproduce the problem. Please suggest How I can fix this. Thanks, Sammy a=c("Male", "Male", "Female", "Male") b=c(1,2,3,4) c=c("great", "bad",

Is it possible to create a database in MySQL via RMySQL? Also, is the format for the authorization field 'userName/password at databasename'? I saw an example like this somewhere in the documenation, but I haven't found the actual specification. Thanks, Barnet Wagman

I find myself writing the following frequently: r = MyActiveRecord.where(:attr1 => cond1, :attr2 => cond2, ...) r.exists? ? r.first : r.create ... which has the effect of returning an instance of MyActiveRecord if all the conditions are met, or creating one if it doesn''t. A variant of this: c = MyActiveRecord.new(:attr1 => val1, :attr2 => val2, ...) r =

Hello, to implement some some kind of optimistic locking, I want to build a view, where an object is displayed together with a link containing the data of the displayed object. My first try looked something like <%= object.object_discription %> <%= link_to "action", :action => "take_action", :data => object %> this won''t work because object is of

All, My apologies if this is a little long-winded and stream of consciousness-y :). SUMMARY: Why do we extend ActiveRecord instead of mixing it in to our model classes? Been thinking about my app''s models and starting to want to build something of a hierarchy. I have some commonality across 3 of my model classes and I''d liek to aggregate the behavior in a superclass.

Hi, i have a "place" model with 2 columns (id, name). I''m calling an external api which gives me data to create a new place object. I would like to add the address from the external place to the place object and render it as a json result, without storing it in the database. i don''t get any errors, but the address never shows up within the json output. i''ve

Hello, Arel::SelectManager (arel 2.0.9) uses following statement to insert a new record: @engine.connection.insert im.to_sql, ''AREL'', primary_key_name, primary_key_value But in DatabaseStatements insert ist defined as: insert(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) Actually, Arel::SelectManager does not use the sequence name. This leads to issues

Hi All, I need to build clang/llvm from source on an Ubuntu Linux system, in order to build the gnustep Objective-C environment. I was able to build clang using cmake without a problem (following the instructions at clang.llvm.org/get_started.html), but when I tried to build gnustep, I found that clang failed to compile an autoconf-generated program. The compile error in the configure log was:

Dear community, I'm using gnustep runtime -fobjc-runtime=gnustep with gnustep-libobjc2 (https://github.com/gnustep/libobjc2) and Cocotron/Chameleon. For following source file #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> int main(void) {         NSString *str = [NSString stringWithCString:"TEST"];

Building the BlocksRuntime isn’t supported via CMake at the moment. It should be pretty straightforward to make it work, but it currently isn’t supported. -Chris > On Sep 29, 2015, at 9:45 AM, Alex Wang via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > As far as I know the makefile in there isn't the makefile that gets executed during the cmake build -- cmake generates its

Do you know about such implementation of the Mac OS API for Linux ? I was thinking would this be hard to be done ? Having in mind that the MacOS and Linux OSes have much more in common than Linux and Windows. The benefits of such projects will be great , as there is great diversity of applications for MacOS ,and if they can be used native in Linux there will be great advantage for all Linux users.

Is there option for deleting xattr-s same as --delete for files, because it seems deletion of xattr don't sync, however it is synced when data of file change, see example below. Maybe this is a bug or maybe this is ok? System gentoo attr-2.4.32, rsync form today cvs. -- Regards Stanislaw Gruszka stasiu@sg /mnt/hda5/export $ echo "data" > file stasiu@sg /mnt/hda5/export $