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Swapping column values in MySQL
...date z set c1 = c2, c2 = @c where if((@c := c1), true, true)
Here is the scripts:
mysql> create table z (c1 int, c2 int)
-> ;
Query OK, 0 rows affected (0.02 sec)
mysql> insert into z values(0, 1), (-1, 1), (pow(2, 31) - 1, pow(2, 31) - 2)
-> ;
Query OK, 3 rows affected (0.00...
What are good grep tools for Windows? [closed]
...d with gawk and xargs (includes 'find', from GnuWin32), and you can really script like you were on Unix!
See also the options I am using to grep recursively:
grep --include "*.xxx" -nRHI "my Text to grep" *
share
...
String concatenation vs. string substitution in Python
... (0.33 to 0.35)
I ran these because I do use string concatenation in my scripts, and I was wondering what the cost was. I ran them in different orders to make sure nothing was interfering, or getting better performance being first or last. On a side note, I threw in some longer string generators ...
How to find gaps in sequential numbering in mysql?
...----+
3 rows in set (0.06 sec)
If you need to perform some kind of shell script task on the missing IDs, you can also use this variant in order to directly produce an expression you can iterate over in bash.
SELECT GROUP_CONCAT(IF(z.got-1>z.expected, CONCAT('$(',z.expected,' ',z.got-1,')'), z....
What is the best way to paginate results in SQL Server
...s well for the entire Execution
Plan in SQL Server.
Below the T-SQL script with the same logic used in the previous
example.
--CREATING A PAGING WITH OFFSET and FETCH clauses IN "SQL SERVER 2012"
DECLARE @PageNumber AS INT, @RowspPage AS INT
SET @PageNumber = 2
SET @RowspPage = 10
SELECT ...
How do you implement a good profanity filter?
...tracked down a profanity word list (not unlike this one) and wrote a quick script to generate a new dictionary without all of the bad words (without even having to look at the list).
For your particular case, I think comparing the search to real words sounds like the way to go with a word list like...
Chrome hangs after certain amount of data transfered - waiting for available socket
...ursite.com and load all your images
from there.
Create a subdomain called scripts.yourdomain.com and load all your JS and CSS files from there.
Create a subdomain called sounds.yoursite.com and load all your MP3s from there... etc..
Nginx has great options for directly serving static files and ma...
What is a “batch”, and why is GO used?
...umn does not exist.
GO is used by the SQL tools to work this out from one script: it is not a SQL keyword and is not recognised by the engine.
These are 2 concrete examples of day to day usage of batches.
Edit: In your example, you don't need GO...
Edit 2, example. You can't drop, create and per...
Git push rejected after feature branch rebase
...
One solution to this is to do what msysGit's rebasing merge script does - after the rebase, merge in the old head of feature with -s ours. You end up with the commit graph:
A--B--C------F--G (master)
\ \
\ D'--E' (feature)
\ /
...
JavaScript: client-side vs. server-side validation
...you can protect against the malicious user, who can easily bypass your JavaScript and submit dangerous input to the server.
It is very dangerous to trust your UI. Not only can they abuse your UI, but they may not be using your UI at all, or even a browser. What if the user manually edits the URL, ...