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How do you find the disk size of a Postgres / PostgreSQL table and its indexes
...relation_size('"' || table_schema || '"."' || table_name || '"') DESC;
Edit: Here's the query submitted by @phord, for convenience:
SELECT
table_name,
pg_size_pretty(table_size) AS table_size,
pg_size_pretty(indexes_size) AS indexes_size,
pg_size_pretty(total_size) AS total_size
F...
GCD to perform task in main thread
...uld think that there's a performance penalty for using async dispatch when it's not necessary, or is it trivial?
– Dan Rosenstark
Dec 16 '11 at 19:33
1
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Adding asterisk to required fields in Bootstrap 3
...
Use .form-group.required without the space.
.form-group.required .control-label:after {
content:"*";
color:red;
}
Edit:
For the checkbox you can use the pseudo class :not(). You add the required * after each label unless it is a checkbox
.fo...
Nested classes' scope?
... def inner_var(self):
return Outer.outer_var
This isn't quite the same as similar things work in other languages, and uses global lookup instead of scoping the access to outer_var. (If you change what object the name Outer is bound to, then this code will use that object the next ti...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
...
HTML5 Email Validation
It is said "With HTML5, we need no more js or a server side code to check if the user's input is a valid email or url address"
...
Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?
...ing in your Mac OS X terminal:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
After that, usage of Homebrew is brew install <package>.
One of the prerequisites for Homebrew are the XCode command line tools.
Install XCode from the App Store...
arrayfun can be significantly slower than an explicit loop in matlab. Why?
...ou can get the idea by running other versions of your code. Consider explicitly writing out the computations, instead of using a function in your loop
tic
Soln3 = ones(T, N);
for t = 1:T
for n = 1:N
Soln3(t, n) = 3*x(t, n)^2 + 2*x(t, n) - 1;
end
end
toc
Time to compute on my compu...
Control the dashed border stroke length and distance between strokes
Is it possible to control the length and distance between dashed border strokes in CSS?
8 Answers
...
Create a matrix of scatterplots (pairs() equivalent) in ggplot2
Is it possible to plot a matrix of scatter plots with ggplot2 , using ggplot 's nice features like mapping additional factors to color, shape etc. and adding smoother?
...