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– bobbyalex
Sep 25 '19 at 3:58
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psql: FATAL: database “” does not exist
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psql -d template1
works for you is that template1 is a database created by postgres itself, and is present on all installations.
You are apparently able to log in to template1, so you must have some rights assigned to you by the database. Try this at a shell prompt:
createdb
and then see if y...
How do I create delegates in Objective-C?
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@end
Then, in the body, we can check that our delegate handles messages by accessing our delegateRespondsTo struct, rather than by sending -respondsToSelector: over and over again.
Informal Delegates
Before protocols existed, it was common to use a category on NSObject to declare the methods a ...
What is the Haskell response to Node.js?
...ncy isn't hard in Haskell, because most code is pure and so is thread-safe by construction. There are simple communication primitives. It's much harder to shoot yourself in the foot with concurrency in Haskell than in a language with unrestricted side effects.
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How do you use version control with Access development?
...ed "decompose.cmd" with
cscript decompose.vbs youraccessapplication.adp
By default, all exported files go into a "Scripts" subfolder of your Access-application. The .adp/mdb file is also copied to this location (with a "stub" suffix) and stripped of all the exported modules, making it really smal...
Retrieve the maximum length of a VARCHAR column in SQL Server
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Watch out!! If there's spaces they will not be considered by the LEN method in T-SQL. Don't let this trick you and use
select max(datalength(Desc)) from table_name
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What do 'statically linked' and 'dynamically linked' mean?
...e at link time so they never change. A dynamically linked file referenced by an executable can change just by replacing the file on the disk.
This allows updates to functionality without having to re-link the code; the loader re-links every time you run it.
This is both good and bad - on one hand...
How to configure an existing git repo to be shared by a UNIX group
...isting git repo (a bare one) which has up to this point only been writable by me. I want to open it up to some UNIX user group, foo, so that all members of foo can push to it. I'm aware that I can easily set up a new git repo with:
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Can I get “&&” or “-and” to work in PowerShell?
... The quickest way to real frustration when learning PowerShell is to start by thinking that it is just an expanded CMD or bash. It has a fundamentally different model, epecially when it comes to input, output, piping, and results. Start with a good tutorial or overview, and don't try too hard to m...
General suggestions for debugging in R
...error occurs, the first thing that I usually do is look at the stack trace by calling traceback(): that shows you where the error occurred, which is especially useful if you have several nested functions.
Next I will set options(error=recover); this immediately switches into browser mode where the ...
