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DROP IF EXISTS VS DROP?
...lly good idea for one to use CASCADE within a transaction block (BEGIN ... COMMIT). This way it is clear how the database will be affected before potentially clobbering a bunch of data you may not have wanted to.
– jbowman
Apr 21 '15 at 17:57
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ry.
To quote Gary Tarolli:
Which actually is doing a floating
point computation in integer - it took
a long time to figure out how and why
this works, and I can't remember the
details anymore.
A slightly better constant, developed by an expert mathematician (Chris Lomont) trying to wo...
differences in application/json and application/x-www-form-urlencoded
...anding is using JSON as contentType helps when the data to be sent is more complex and involves a lot of hierarchy.. whereas form encoded is good to send simple params in url which can be read at the backend without to much code... I guess this answers the why part of it.
– Ank...
How to include file in a bash shell script
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Simply put inside your script :
source FILE
Or
. FILE # POSIX compliant
$ LANG=C help source
source: source filename [arguments]
Execute commands from a file in the current shell.
Read and execute commands from FILENAME in the current shell. The
entries in $PATH are used to find the...
How to change owner of PostgreSql database?
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For completeness here is the part of the manual which documents this: postgresql.org/docs/current/static/sql-alterdatabase.html
– a_horse_with_no_name
Nov 30 '10 at 12:29
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UIView's frame, bounds, center, origin, when to use what?
...frame. A good discussion of this can be found at the link below. It is uncommon for this property to be manipulated unless there is specific need to adjust the drawing region. The only exception is that most programs will use the [[UIScreen mainScreen] bounds] on startup to determine the visible ...
In Python, how do I create a string of n characters in one line of code?
..._val = "x" * 10 # gives you "xxxxxxxxxx"
And if you want something more complex, like n random lowercase letters, it's still only one line of code (not counting the import statements and defining n):
from random import choice
from string import ascii_lowercase
n = 10
string_val = "".join(choice...
Fastest way to download a GitHub project
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