indexing

问题 This is a basic example that I know can be simplified, but for testing sake, I would like to do this in such a way. I want to set a variable based on an appending string (the variables "cam0" and "pos1" are already declared in the class). The appending string would essentially be an index, and i would iterate through a loop to assign cameras (cam0, cam1..) to different positions (pos0, pos1..). cam0 is defined as an UIImageView pos1 is defined as a CGRect This works for a NSString Variable

问题 Suppose I created a table table in a Rails app. Some time later, I add a column running: rails generate migration AddUser_idColumnToTable user_id:string. Then I realize I need to add user_id as an index. I know about the add_index method, but where should this method be called? Am I supposed to run a migration (if yes, which one ?), then adding by hand this method? 回答1: You can run another migration, just for the index: class AddIndexToTable < ActiveRecord::Migration def change add_index

问题 Suppose I created a table table in a Rails app. Some time later, I add a column running: rails generate migration AddUser_idColumnToTable user_id:string. Then I realize I need to add user_id as an index. I know about the add_index method, but where should this method be called? Am I supposed to run a migration (if yes, which one ?), then adding by hand this method? 回答1: You can run another migration, just for the index: class AddIndexToTable < ActiveRecord::Migration def change add_index

问题 I want to index and search two different entity. File name: db-data-config.xml <dataConfig> <dataSource name="myindex" driver="com.microsoft.sqlserver.jdbc.SQLServerDriver" url="jdbc:sqlserver://test-pc:1433;DatabaseName=SampleDB" user="username" password="password" /> <document> <entity name="Employees" query="select * from employee" transformer="TemplateTransformer" dataSource="myindex"> <field column="id" name="singlekey" /> <field column="eId" name="eid" /> <field column="eName" name=

问题 Suppose I have a Javascript array, like so: var test = ['b', 'c', 'd', 'a']; I want to sort the array. Obviously, I can just do this to sort the array: test.sort(); //Now test is ['a', 'b', 'c', 'd'] But what I really want is an array of indices that indicates the position of the sorted elements with respect to the original elements. I'm not quite sure how to phrase this, so maybe that is why I am having trouble figuring out how to do it. If such a method was called sortIndices(), then what I

问题 Suppose I have a Javascript array, like so: var test = ['b', 'c', 'd', 'a']; I want to sort the array. Obviously, I can just do this to sort the array: test.sort(); //Now test is ['a', 'b', 'c', 'd'] But what I really want is an array of indices that indicates the position of the sorted elements with respect to the original elements. I'm not quite sure how to phrase this, so maybe that is why I am having trouble figuring out how to do it. If such a method was called sortIndices(), then what I

问题 I am new to index match as I just downloaded Excel 2016 and I am beyond lost. For context, I will be adding my formula to cell Q3 and dragging it down. Sheet 2 runs from A1-N25435 I am trying to look up an ID Number (sheet 1, column B) and return of the requisition number(s) (sheet 2, column D) associated with that candidate ID (Sheet 2, Column C). I run into issues as there could be up to 20 requisitions associated with a specific ID and I can't seem to get any data to return. Ideally, this

问题 I am new to index match as I just downloaded Excel 2016 and I am beyond lost. For context, I will be adding my formula to cell Q3 and dragging it down. Sheet 2 runs from A1-N25435 I am trying to look up an ID Number (sheet 1, column B) and return of the requisition number(s) (sheet 2, column D) associated with that candidate ID (Sheet 2, Column C). I run into issues as there could be up to 20 requisitions associated with a specific ID and I can't seem to get any data to return. Ideally, this

问题 I've created a Swift array that contains collections of two instances of a custom data type: var myArray : [(MyDataType, MyDataType)]! When I want to add items to this array, it's trivial to do so with the following code (where firstVar and secondVar are instances of MyDataType ) myArray.append((firstVar, secondVar)) What I'm currently struggling with is removing items from myArray . Using this code, I get an error of Value of type '[(MyDataType, MyDataType)]' has no member 'indexOf' : let

问题 I am trying to lookup a part number in a separate table array, the same value could be in multiple rows. The formula should find each instance of the value in the other table, move to a date column and determine which months the value exists in and which row it belongs to. The entire table B3:F15 should be automated. I have attached an image with proper explanation of what I am trying to accomplish if at all possible. The formulas would be entered into B3:F15. These are the cells where the