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How do you validate a URL with a regular expression in Python?
...her defined in RFC822
; NEWS (see also RFC1036)
newsurl = "news:" grouppart
grouppart = "*" | group | article
group = alpha *[ alpha | digit | "-" | "." | "+" | "_" ]
article = 1*[ uchar | ";" | "/" | "?" | ":" | "&" | "=" ] "@" host
; NNTP (see also RFC977)
nntpu...
How to update two tables in one statement in SQL Server 2005?
... through the following:
An aggregate function: AVG, COUNT, SUM, MIN, MAX, GROUPING, STDEV, STDEVP, VAR, and VARP.
A computation. The column cannot be computed from an expression that uses other columns. Columns that are formed by using the set operators UNION, UNION ALL, CROSSJOIN, EXCEPT, and INTE...
Database, Table and Column Naming Conventions? [closed]
...r first db or two, I would not suggest using prefixes for general thematic grouping of tables. Tables end up not fitting your categories easily, and it can actually make it harder to find tables. With experience, you can plan and apply a prefixing scheme that does more good than harm. I worked in...
How can I create directories recursively? [duplicate]
...n', '-R', 'dail:users', 'first'])
# Recursively change owner to 'dail' and group to 'users' for 'first' and all of
# its subdirectories.
>>> subprocess.check_output(['chmod', '-R', 'g+w', 'first'])
# Add group write permissions to 'first' and all of its subdirectories.
EDIT I originally ...
Portable way to get file size (in bytes) in shell?
...age: -n: Turn on the -l (ell) option, but when writing the file's owner or group, write the file's numeric UID or GID rather than the user or group name, respectively. Disable the -C, -m, and -x options.
– Palec
Jul 4 '17 at 15:03
...
Hidden Features of Xcode 4
...sed #pragma mark - and #pragma mark <name> to provide a nice visual grouping in the Xcode class dropdown list. Xcode 4 now combines these into a single #pragma mark - <name>.
More on pragma mark.
share
...
Real life example, when to use OUTER / CROSS APPLY in SQL
...
Some uses for APPLY are...
1) Top N per group queries (can be more efficient for some cardinalities)
SELECT pr.name,
pa.name
FROM sys.procedures pr
OUTER APPLY (SELECT TOP 2 *
FROM sys.parameters pa
WHERE ...
jQuery pitfalls to avoid [closed]
...
It seems your last point is incorrect - groups.google.co.uk/group/jquery-dev/browse_thread/thread/…
– James
Aug 14 '09 at 12:28
1
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Could someone explain the pros of deleting (or keeping) unused code?
...
I'm sorry, I don't know what you mean by this.
If organized well (grouped, separate package, loosely coupled etc) it doesn't disturbs you on overall code analysis or refactoring
If it exists in the code base, no matter how well organized, it contributes to the maintenance and comprehen...
How do I do a bulk insert in mySQL using node.js
... using nested array, see the github page
Nested arrays are turned into grouped lists (for bulk inserts), e.g.
[['a', 'b'], ['c', 'd']] turns into ('a', 'b'), ('c', 'd')
You just insert a nested array of elements.
An example is given in here
var mysql = require('mysql');
var conn = mysql.cr...