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What does the `forall` keyword in Haskell/GHC do?
... val = maybe onNothin onJust mval
This code doesn't compile (syntax error) in plain Haskell 98. It requires an extension to support the forall keyword.
Basically, there are 3 different common uses for the forall keyword (or at least so it seems), and each has its own Haskell extension: Scope...
Bash script prints “Command Not Found” on empty lines
...you usually just need to look at the command output immediately before the error to see what's causing the problem
If, as you say, it's the blank lines causing the problems, you might want to check what's actaully in them. Run:
od -xcb testscript.sh
and make sure there's no "invisible" funny cha...
Determine project root from a running node.js application
...the directory doesn't contain your application then it should exit with an error prompting the user to create the variable. It could be set as a part of an install process.
You can read environment variables in node with something like process.env.MY_ENV_VARIABLE.
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Detach many subdirectories into a new, separate Git repository
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hm. even with extglob turned on I'm getting an error near my parenthesis: syntax error near unexpected token `(' my command looks like: git filter-branch -f --index-filter "git rm -r -f --cached --ignore-unmatch src/css/themes/!(some_theme*)" --prune-empty -- --all an ...
How are echo and print different in PHP? [duplicate]
...s like:
echo 'Doing some stuff... ';
foo() and print("ok.\n") or print("error: " . getError() . ".\n");
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ImportError: No module named matplotlib.pyplot
...tallation of matplotlib using python3 -m pip install matplotlib solved the error. Tested on Ubuntu 16.04.
– vineeshvs
Jun 5 '19 at 6:22
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Disable Enable Trigger SQL server for a table
I want to create one proc like below but it has error on syntax.
Could anyone pointing out the problem?
7 Answers
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What is a 'semantic predicate' in ANTLR?
...gStream("123, 456, 7777 , 89");
and do the test again: you will see an error appearing on the console right after the string 777.
Semantic Predicates
This brings us to the semantic predicates. Let's say you want to parse
numbers between 1 and 10 digits long. A rule like:
number
: Digit ...
How do I check if the mouse is over an element in jQuery?
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Uncaught Error: Syntax error, unrecognized expression: unsupported pseudo: hover
– Julio Marins
Jan 7 '15 at 12:56
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Git commit in terminal opens VIM, but can't get back to terminal
...r Mac/Linux:
git config --global core.editor "subl -n -w"
If you get an error message such as:
error: There was a problem with the editor 'subl -n -w'.
Create the alias for subl
sudo ln -s /Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl /usr/local/bin/subl
Again check th...