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Fast way to discover the row count of a table in PostgreSQL
...of rows due to the nature of MVCC. There is a way to speed this up dramatically if the count does not have to be exact like it seems to be in your case.
Instead of getting the exact count (slow with big tables):
SELECT count(*) AS exact_count FROM myschema.mytable;
You get a close estimate like ...
SSH configuration: override the default username [closed]
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Create a file called config inside ~/.ssh. Inside the file you can add:
Host *
User buck
Or add
Host example
HostName example.net
User buck
The second example will set a username and is hostname specific, while the first e...
How to make node.js require absolute? (instead of relative)
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There's a really interesting section in the Browserify Handbook:
avoiding ../../../../../../..
Not everything in an application properly belongs on the public npm
and the overhead of setting up a private npm or git repo is sti...
How do I preview emails in Rails?
...iables the template expects.
This could be done with fixtures, but I typically prefer to just grab some pseudo-random real data. Remember - this is NOT a unit test - this is purely a development aid. It doesn't need to produce the same result every single time - in fact - it's probably better if ...
How can I see what I am about to push with git?
...ys dry-run:
git push --dry-run
It will do everything except for the actually sending of the data.
If you want a more graphical view you have a bunch of options.
Tig and the gitk script that come with git both display the current branch of your local copy and the branch of the remote or origin....
How can I install a local gem?
If I download a .gem file to a folder in my computer, can I install it later using gem install ?
9 Answers
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Difference between VARCHAR and TEXT in MySQL [duplicate]
...R(30) instead of TINYTEXT or TEXT and if someone tries to save the text of all three "Lord of the Ring" books in your phone number column you only store the first 30 characters :)
Edit: If the text you want to store in the database is longer than 65535 characters, you have to choose MEDIUMTEXT or L...
How to draw circle in html page?
...have a higher chance of it looking the same on different systems since not all computers/browsers have the same fonts installed.
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EditorFor() and html properties
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Doesn't this answer, totally ignore what the question is about, namely the EditorFor-Template functionality?
– Philipp M
Sep 11 '13 at 10:22
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Java 8 stream's .min() and .max(): why does this compile?
...bout.
So the question is, of course, why is Integer::max accepted? After all it's not a comparator!
The answer is in the way that the new lambda functionality works in Java 8. It relies on a concept which is informally known as "single abstract method" interfaces, or "SAM" interfaces. The idea ...