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Remove duplicate values from JS array [duplicate]

...ow it's usually done. The idea is to place each element in a hashtable and then check for its presence instantly. This gives us linear time, but has at least two drawbacks: since hash keys can only be strings or symbols in JavaScript, this code doesn't distinguish numbers and "numeric strings". Th...
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How can I create a directly-executable cross-platform GUI app using Python?

... First you will need some GUI library with Python bindings and then (if you want) some program that will convert your python scripts into standalone executables. Cross-platform GUI libraries with Python bindings (Windows, Linux, Mac) Of course, there are many, but the most popular that...
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Rails and PostgreSQL: Role postgres does not exist

...maintains database permissions. If there is no role for the postgres user, then it can't access anything. The createuser command is a thin wrapper around the commands CREATE USER, CREATE ROLE, etc. share | ...
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Check if image exists on server using JavaScript?

...ms in some situations: I would suggest to append the image in any case and then substitute it only in the case of errors. – Giorgio Tempesta Jan 31 '18 at 11:01 ...
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How can I undo git reset --hard HEAD~1?

...you know you can stash your local changes before doing a reset --hard, and then just pop them and you lose nothing! Gotta love git. – Lethjakman Sep 1 '14 at 2:49 5 ...
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How to pass arguments to addEventListener listener function?

... lexical scope . If you just create different function in same environment then they will reference to same environment. – bugwheels94 May 20 '15 at 15:58 ...
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Removing double quotes from variables in batch file creates problems with CMD environment

...atch file parameters is normally solved by removing the quotes with %~ and then putting them back manually where appropriate. E.g.: set cmd=%~1 set params=%~2 %~3 "%cmd%" %params% Note the quotes around %cmd%. Without them, path with spaces won't work. If you could post your entire batch code,...
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When creating a service with sc.exe how to pass in context parameters?

... ... and DisplayName= ...; in my case I forgot the "=" after DisplayName), then the console will print the usage instructions for the create command; like: DESCRIPTION: Creates a service entry... USAGE: sc <server> create.... etc – The Red Pea Feb 28 '16 ...
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Extending Angular Directive

...ve by passing its name, concatenated with Directive as the first argument, then we retrieve it from the callback parameter (which is an array of directives matching that name). Once we got it, we can obtain its scope object and extend it as needed. Notice that all of this has to be done in the conf...
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Using OpenSSL what does “unable to write 'random state'” mean?

... I had the same thing on windows server. Then I figured out by changing the vars.bat which is: set HOME=C:\Program Files (x86)\OpenVPN\easy-rsa then redo from beginning and everything should be fine. ...