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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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  • 42S22 SQL error: Column not found, why?

    - by Vincenzo
    This is my SQL: SELECT `tbl`.*, 123 AS `test` FROM `tbl` GROUP BY `test` It works when I run it directly in MySQL. But PDO says: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'test' in 'field list' Why so? How to cure this problem? I'm using Zend_Db.

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  • run multiple webservices at a time

    - by Prajakta
    Hello, I have written a webservice which is taking URL as an input and producing a JSON respone. My problem is that now I have list of 1000 URLs and want to execute maximum threads of Webapplications to get output. Like I want to execute 100 instances of webservice at a time to get response.Please can anybody give some guidance how can I do it using java. Thank you in advance

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  • Easy - Read a file into a array

    - by ineedtehhelpz
    So I have a .dat file that just holds a list of names, each name is on a new line. I am having a day of complete mental blanks but how would I go about getting those names out of the file and puting them into a array. Thanks for any help

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  • R: How to replace elements of a data.frame?

    - by John
    I'm trying to replace elements of a data.frame containing "#N/A" with "NULL", and I'm running into problems: foo <- data.frame("day"= c(1, 3, 5, 7), "od" = c(0.1, "#N/A", 0.4, 0.8)) indices_of_NAs <- which(foo == "#N/A") replace(foo, indices_of_NAs, "NULL") Error in [<-.data.frame(*tmp*, list, value = "NULL") : new columns would leave holes after existing columns I think that the problem is that my index is treating the data.frame as a vector, but that the replace function is treating it differently somehow, but I'm not sure what the issue is?

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  • Testing instance variables from controllers with rspec

    - by Thiago
    Hi, I am trying to get the following spec to run: describe BlacklistController, "GET index" do it "should display the list of universally blocked numbers" do get :index debugger assigns[:blocked_numbers].should contain "190" end end Here's the action def index @blocked_numbers << "190" respond_to do |format| format.html end end And the failure simply says that assigns[:blocked_numbers} is nil. Why's that?

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  • Selecting favourites from DB rails 3

    - by Richlewis
    I have a small app which has Users, Recipes, Ingredients and preparation models A user has many recipes, recipes belong to user and ingredients/preparation belongs to recipes. Now a user can view all recipes but I would like the option to add the particular recipe to a favourites list. Would I need to set a new DB to hold this and then link by associations or could I add a column to the recipe model called fav for example? Im looking for the best practice here or if someone has done this before and can offer any advice that would be appreciated

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  • JQuery: Get SRC for each image that has specific atrtibute

    - by adbox
    Hey Guys, I am wokring on a dialog, where in execution I want to round up all items that have a specific attribute and place an attribute value of their's into a comma delited list. This is as far as I have gotten, which isnt far. buttons: { 'Hook': function(){ $('.grid_pic:has(border=3)').(loop through id's, grab src, build variable with srcs comma delimeited) } Any ideas?

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  • Creating Java Dialogs

    - by mike_hornbeck
    What would be the easiest way for creating a dialog: - in one window I'm giving data for envelope addressing, also set font type from list of sizes - when clicked OK, in the same window or in next window I get preview of how the envelope would look like with the given names, and used selected font size It should look similarly to this : Should I use Jdialog ? Or will JOptionPane will be enough ? The next step will be to choose color of font and background so I must keep that in mind.

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  • I want to create an expression for querystrings, this stuff is hard!

    - by jkirkerx
    I want to extract some keywords out of a query string for a search application in asp.net. I decoded the url string first, so it's plain text I have this to start with, but I want to add a keyword group I'd like to trim off the stuff for pure words, but not sure if that's possible I also have a long list of possible query string value fields that I want to check against ?q= @q= ?qs= &qs=

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  • Dumb RichTextBox question

    - by John Williams
    I need to get a list of tags in a text, make their contents bold, and remove them. Can't figure out how to make it. E.g. with the following input: foo [b]bar[/b] The result should be: foo bar I use the following code to extract the tags: Dim matches = Regex.Matches(OriginalRich.Text, String.Format("(\[{0}\])(.*?)(\[/{0}\])", tag), RegexOptions.IgnoreCase Or RegexOptions.Compiled) Any help would be appreciated.

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  • How to deploy an application with firewall permissions on Mac?

    - by user264878
    I've bundled a jar file as a mac application using jar bundler. I'm now trying to create an installer for this app so that: 1) The application will be placed in the applications folder 2) The application is added to the list of permissible apps in Mac Application Level Firewall Also, I have several example files I would like to include with this application - what is the best way to make these available to the user. Someone suggested I have the mpkg file launch a dmg file which would contain these files, but this seems circuitous. Thanks

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  • Confused for creating Gtk+C Widget.

    - by PP
    I am really confused, I want to create one list that holds 2 Images and 2 labels as follows. +----------------------+ ROW1 |Image1 Image2 Lebel1 | | Lebel2 | +----------------------+ ROW2 |Image1 Image2 Lebel1 | | Lebel2 | +----------------------+ But i don't want it in a table/columns it should be simple selectable rows without any borders. Which widget i should use for this and how? Thanks, PP.

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  • Are Objective-C function names stored in text?

    - by thyrgle
    I don't remember where I heard about it, (I think I was searching up on how selectors worked and it ended up not being exactly the same as a callback function) and I can't confirm it. But more importantly than that, is there a way I could get a list of the function names from another application?

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