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How can I drop all the tables in a PostgreSQL database?
...web2py), using the former caused problems:
<class 'psycopg2.ProgrammingError'> no schema has been selected to create in
So to my mind the fully correct answer is:
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
GRANT ALL ON SCHEMA public TO postgres;
GRANT ALL ON SCHEMA public TO public...
How can I access and process nested objects, arrays or JSON?
... using bracket notation:
const value = arr[5]; // arr.5 would be a syntax error
// property name / index as variable
const x = 5;
const value = arr[x];
Wait... what about JSON?
JSON is a textual representation of data, just like XML, YAML, CSV, and others. To work with such data, it first has t...
Run a string as a command within a Bash script
...
eval is an evil command in all programming languages so use it with caution.
– Krishnadas PC
Jul 17 '18 at 6:50
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How to convert nanoseconds to seconds using the TimeUnit enum?
...uld never write out 1 followed by a whole mess of 0's due to it being very error prone.
– demongolem
Feb 23 '16 at 18:56
1
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How to grep (search) committed code in the Git history
...p <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass that to the rev-list subcommand and grep as well:
git grep <regexp> $(git rev-list --all -- lib/util) -- lib/uti...
Why is GHC so large/big?
...
It's a bit silly really. Every library that comes with GHC is provided in no less than 4 flavours:
static
dynamic
profiled
GHCi
The GHCi version is just the static version linked together in a single .o file. The other three versions all ...
Can I use Objective-C blocks as properties?
...al places use a type def
typedef void(^MyCompletionBlock)(BOOL success, NSError *error);
@property (nonatomic) MyCompletionBlock completion;
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How can I recursively find all files in current and subfolders based on wildcard matching?
...nt to be notified about directories you don't have permission to (or other errors), you can do find . -name "foo*" 2>/dev/null
– Jobbo
Aug 15 '17 at 10:54
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How do you create a daemon in Python?
...le : try to start two times the same daemon with python-daemon : big ugly error. With Sander's code : a nice notice "Daemon already running."
– Basj
Jan 17 '16 at 20:50
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How to write log base(2) in c/c++
...mpiler doesn't know that log10 will return the same value every time. For all the compiler knows, log10(2) could return different values on successive calls.
– abelenky
Jun 17 '10 at 21:24
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