alias

问题 I dont quite get the application of alias expressions. I understand that I can write something like this cmake_minimum_required(VERSION 3.5.1 FATAL_ERROR) project(myLibs) add_library(${PROJECT_NAME} src/test.cpp) add_library(myLibs::myLibs ALIAS ${PROJECT_NAME}) ... and then use target_link_libraries(${TARGET_NAME} myLibs::myLibs in another file to link the library to some executable, etc. but why would I do that? I might as well skip the alias definition and just use the targetname of the

问题 Using import aliasing in one file/class, we can reference class library namespaces by assigning our own custom alias like this: ' VB Imports Db = Company.Lib.Data.Objects // C# using Db = Company.Lib.Data.Objects; And then we are able to reference the classes inside of Company.Lib.Data.Objects by using the Db alias that we assigned. Is it possible to do this at the global level so that the alias is applied to the entire solution instead of just one file/class? Currently, we are working with

问题 As a newbie to Postgresql (I'm moving over because I'm moving my site to heroku who only support it, I'm having to refactor some of my queries and code. Here's a problem that I can't quite understand the problem with: PGError: ERROR: column "l_user_id" does not exist LINE 1: ...t_id where l.user_id = 8 order by l2.geopoint_id, l_user_id ... ^ ...query: select distinct l2.*, l.user_id as l_user_id, l.geopoint_id as l_geopoint_id from locations l left join locations l2 on l.geopoint_id = l2

问题 I saw in this topic that you can add a function in the shell login script instead of an alias if you want to use parameters. However, I placed the following code inside my .cshrc file in the section with aliasses: function gf() { grep -n $1 `find .` | grep -v "can't open" } But when I type source .cshrc, I get the error message: Badly placed ()'s. Is the syntax different for a C shell than in a Bash shell? If so, what is the correct syntax? 回答1: Unfortunately, you can't define functions in

问题 Apple specifies in the UILocalNotification class reference that the audio file must be from the application bundle. However, some smart geek has found his way around this limitation by using: // this works by going up the bundle dir, then pointing to the Documents dir localNotif.soundName = @"../Documents/blabla.caf"; This workaround has worked well with iOS 5, however, it broke in iOS 6. In a desperate attempt to try and come up with a new workaround, I made an alias (Symbolic Link) called

问题 I'm using C# .NET application with NEST to create an index. I've created an elasticsearch index that customers can query called index_1. I then build another version of the index using a different instance of the application and call it index_1_temp. What is the safest way for me to rename index_1_temp to index_1 then delete the original index_1? I know ES has aliases but I'm not sure how to use them for this task EDIT: The original index does not have an Alias associated with it. 回答1: I

问题 I am almost brand new to python scripting, so please excuse any stupid questions, but any help anyone can give would be much appreciated. I am trying to write a python script for other people to use, and in it I need to call a program that I won't always know the path to. To get around that, I ask the user to provide the path to the program, which will work, but I don't want users to have to provide the path EVERY time they run the script so I have been trying to set up a bash alias by having

问题 I want to be able to alias the root list element depending upon what type of objects are contained in the list. For example, this is my current output: <list> <coin>Gold</coin> <coin>Silver</coin> <coin>Bronze</coin> </list> And this is what I want it to look like: <coins> <coin>Gold</coin> <coin>Silver</coin> <coin>Bronze</coin> </coins> I can do this at a global level by saying all lists should be aliased to coins, but I have a lot of different lists and this won't work. Any ideas on how to

问题 I am developing a new Rails app based on a similar existing one. In my old app, I have Coupon class, which is very similar to Ticket in my new app. I want to reuse all code in Coupon, but with a new class name. Since refactoring is cumbersome in Rails, I wonder if there is a way to create alias for a class in Ruby (similar to alias for attributes and methods). 回答1: Classes don't have names in Ruby. They are just objects assigned to variables, just like any other object. If you want to refer