alias

问题 Some Scala APIs alias this to self , for example, trait Function1[-T1, +R] extends AnyRef { self => I know how this aliasing works in general, but don't see how traits such as Function1 benefit from it. Function1 does not use self anywhere in its definition except for the initial mention, so what is its purpose here? Variants of this question have been asked previously, but the answers are not directly applicable. Answers have discussed self types and inner classes, but I don't see how that

问题 I had a .profile file that I was reading and using aliases from in my terminal, but at some point the aliases stopped working for no clear reason (other commands were still working). Thinking to make a quick fix, I deleted (rm) and recreated my .profile file in my user directory. There are no bash_profiles or others in existence that I can see, at leasts in that directory. The new .profile did not work. I tried restarting the terminal and the computer. Now, the commands that worked in the

问题 Im setting up my powershell profile to create aliases of commonly used commands. On Microsoft's documentation it says, if I want to make an alias for a command with parameters, I should make the value of the alias a Function that does that.. However, when I type the name of the function in the command line it works just as well as an alias. In other words, in the above picture, if I typed CD32 it would behave the same as if I typed Go in the command line So my question is: Why do I use

问题 I am trying to combine anchors and aliases in order to reuse values into several containers, under different names. I tried the following code: FWL_GV_NANSEN: &fwl_gv_nansen dtype: float value: 2715.0 FWL_GV_E3_2: &fwl_gv_e32 *fwl_gv_nansen the goal is simply to have another variable FWL_GV_E3_2 containing the same information than FWL_GV_NANSEN that I could refer to later on. Just the same than defining in Python (or other): a = 5.0 b = a c = b But this triggers the following error message:

问题 SELECT * FROM (SELECT ROW_NUMBER() OVER (PARTITION BY a.vendorid ORDER BY a.CreatedDateUTC) as RowNum ,* FROM ZpVendors_Kim.dbo.VendorPaymentAcceptanceAudit a) Needs_Alias_Here WHERE RowNum = 1 Very simple query, just wondering - why is an alias needed for it to work? 回答1: The alias after the subquery (or derived table, if you prefer) is required by SQL Server. It is not only a requirement but a really good idea. In general, column references should be qualified , meaning that they include a

问题 I'm trying to use an alias in a shell script I'm writing, but it is not working. The alias: alias ts="awk '{ print strftime(\"[%Y-%m-%d %H:%M:%S]\"), \$0 }'" When I run the script, I get the following error: ./copyTask.sh: ts: not found Sooping around on the internet, it seems that I need to enable the expand_aliases shell option, but I don't have shopt installed... Is there any way I can enable alias expansion without using shopt or creating another rootfs image? I'm using the ash shell. And

问题 I have defined some aliases in my .bash_profile file and aliases work as expected. e.g alias python-server="python -m SimpleHTTPServer 7070" And, When I open new terminal, typing python-server opens up a python server with current directory as root (or "/"). But I have around 10 aliases and I want to backup the aliases So I thought to create an external file which contain these aliases and am trying to source that file from .bash_profile like this source ~/personal/Dropbox/scripts/aliases.sh

问题 I have one Folder and I have created an Alias (Short-cut) on my MAC OS Desktop. Now, when I copy that Alias from MAC OS to Windows, then it shows me a type of file as "File". Now if I again copy that Alias from Windows to Mac OS, then that alias is now Unix Executable file and Not an Alias. I have tried zipping that Alias, and still having the same issue. Is it possible to persist MAC Alias on Windows and when i copy that Alias back to Mac then it remains Alias. 回答1: Mac filesystems can

问题 How to set import shortcuts/aliases in create-react-app? From this: import { Layout } from '../../Components/Layout' to this: import { Layout } from '@Components/Layout' I have a webpack 4.42.0 version. I don't have a webpack.config.js file in the root directory. I've tried to create one myself with this code inside: const path = require('path') module.exports = { resolve: { alias: { '@': path.resolve(__dirname, 'src/'), } } }; But it doesn't seem to work. I've seen the NODE_PATH=. variant in

问题 How to set import shortcuts/aliases in create-react-app? From this: import { Layout } from '../../Components/Layout' to this: import { Layout } from '@Components/Layout' I have a webpack 4.42.0 version. I don't have a webpack.config.js file in the root directory. I've tried to create one myself with this code inside: const path = require('path') module.exports = { resolve: { alias: { '@': path.resolve(__dirname, 'src/'), } } }; But it doesn't seem to work. I've seen the NODE_PATH=. variant in