global

This is a continuation** of my quest to switch from regular DynamoDB tables to DynamoDB2 ones with Global Secondary Indices. So I created my table as shown here and then added the following two elements: table.put_item(data={'firstKey': 'key01', 'message': '{"firstKey":"key01", "comments": "mess 1 w/o secondKey"}'}) table.put_item(data={'firstKey': 'key02', 'secondKey':'skey01', 'message': '{"firstKey":"key02", "parentId":"skey01", "comments": "mess 2 w/ secondKey"}'}) What I want to do now is retrieve items by either their (i) unique firstKey values or (ii) unique secondKey values. The 1st

Many times I heard to avoid static classes because they will insert dependencies that will render your code unusable in other projects, and will not allow to unit test it . Let's say we have a typical class DB to access the Data Base, if such class is static we could call it wherever in our code: DB::execQuery(...); but this creates dependencies, so let's make the DB class NOT static, in such case we would have somewhere in our code: $db = new DB(); and then we could call in our code $db->execQuery(...); But now when using the $db inside a function we need each time to first declare it like

I have around 40 models in my RoR application. I want to setup a after_save callback for all models. One way is to add it to all models. Since this callback has the same code to run, is there a way to define it globally once so that it gets invoked for all models. I tried this with no luck: class ActiveRecord::Base after_save :do_something def do_something # .... end end Same code works if I do it in individual models. Thanks, Imran You should use observers for this: class AuditObserver < ActiveRecord::Observer observe ActiveRecord::Base.send(:subclasses) def after_save(record) AuditTrail.new

Does anyone know if it is possible to create a single connection string that will be accessible to all the projects in a solution (we have about 6). I can create a text file with this information, but we need design time support as well, and it is not practical to have a connection string in every App.Config and Web.config file in the solution. We basically want a Single connection string that is easy to change should the location of the db change, that will also be used by the IDE for design time support mafu Not sure, can't you just put a new config file to the solution items and include and

global m = 1; function p = h() m end h() I'm trying to run this script, but I get this error: 'm' undefined near line 4 column 3 Say me please, how I can use the variable from functions? You have to declare the var also global inside the function as described here: https://www.gnu.org/software/octave/doc/interpreter/Global-Variables.html global m = 1; function p = h() global m; m endfunction h() 来源： https://stackoverflow.com/questions/27409364/global-variable-in-octave

I have this code: var one; $("#ma1").click(function() { var one = 1; }) $("body").click(function() { $('#status').html("This is 'one': "+one); }) and when I click the body, it says: This is 'one': undefined. How can I define a global variable to be used in another function? Remove the var from inside the function. $("#ma1").click(function() { one = 1; }) If you want to make a global variable bind it to window object window.one = 1; var one;//define outside closure $("#ma1").click(function() { one = 1; //removed var }) $("body").click(function(e) { $('#status').html("This is 'one': "+one); })