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Oracle SQL Query for listing all Schemas in a DB
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How about :
SQL> select * from all_users;
it will return list of all users/schemas, their ID's and date created in DB :
USERNAME USER_ID CREATED
------------------------------ ---------- ---------
SCHEMA1 ...
Deleting all records in a database table
... It's worth noting that if you've got associations with :dependent => :destroy, or anything that needs to be cleaned up upon deletion, you'll probably want Post.destroy_all - though it is much slower. See apidock.com/rails/ActiveRecord/Base/destroy_all/class
– Michael ...
Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds
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Swift 3
extension Date {
func toString(template: String) -> String {
let formatter = DateFormatter()
formatter.dateFormat = DateFormatter.dateFormat(fromTemplate: template, options: 0, locale: NSLocale.current)
return formatter.string(from: self)
}
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Programmatically set left drawable in a TextView
... Math.abs(wi - width) - Math.abs(hi - height);
float scale = (dimDiff > 0) ? width / (float)wi : height /
(float)hi;
Rect bounds = new Rect(0, 0, (int)(scale * wi), (int)(scale * hi));
drawable.setBounds(bounds);
return drawable;
}
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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
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Consider the code below.
def return_something(someint):
if someint > 5:
return someint
y = return_something(2)
y.real()
This is going to give you the error
AttributeError: 'NoneType' object has no attribute 'real'
So points are as below.
In the code, a function or class me...
Is it possible to decompile a compiled .pyc file into a .py file?
...pile (even support latest Python 3.8.0):
uncompyle6 utils.cpython-38.pyc > utils.py
and the origin python and decompiled python comparing look like this:
so you can see, ALMOST same, decompile effect is VERY GOOD.
sh...
Bundler: Command not found
...th was in .bashrc (or other shell profile), at least according to
$PATH
=> zsh: /Users/myself/.rbenv/shims:/Users/myself/.rbenv/bin: ... etc
but it was expecting it to be installed for myself - not for root. In my case, its rightful installation place is in ~/.rbenv/versions/1.9.3-p194/lib/rub...
Merging objects (associative arrays)
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_.extend(destination, *sources)
_.extend({name : 'moe'}, {age : 50});
=> {name : 'moe', age : 50}
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In which language are the Java compiler and JVM written?
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This is really rather an old document (>10 years by the look of things). For example, it says "Java bytecodes are translated on the fly to native machine instructions (interpreted) and not stored anywhere" which has not been true for about 5 years!
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How to force composer to reinstall a library?
...gested the obvious and the most straight forward way to force re-install:
> composer remove vendor-name/package-name && composer vendor-name/package-name
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