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How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...import readline
def completer(text, state):
options = [i for i in commands if i.startswith(text)]
if state < len(options):
return options[state]
else:
return None
readline.parse_and_bind("tab: complete")
readline.set_completer(completer)
The official module docs ar...
SQL - Update multiple records in one query
...e syntax
UPDATE config t1 JOIN config t2
ON t1.config_name = 'name1' AND t2.config_name = 'name2'
SET t1.config_value = 'value',
t2.config_value = 'value2';
Here is SQLFiddle demo
or conditional update
UPDATE config
SET config_value = CASE config_name
WH...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...uld mean that there was a problem.
If the value can be missing or present and both are valid for the application logic then return a null.
More important: What do you do other places in the code? Consistency is important.
...
Reorder / reset auto increment primary key
...g like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows.
15 Answers
...
Easiest way to copy a table from one database to another?
...shell access you may use mysqldump to dump the content of database1.table1 and pipe it to mysql to database2. The problem here is that table1 is still table1.
mysqldump --user=user1 --password=password1 database1 table1 \
| mysql --user=user2 --password=password2 database2
Maybe you need to renam...
Decode HTML entities in Python string?
...e('&pound;682m'))
FYI html.parser.HTMLParser.unescape is deprecated, and was supposed to be removed in 3.5, although it was left in by mistake. It will be removed from the language soon.
Python 2.6-3.3
You can use HTMLParser.unescape() from the standard library:
For Python 2.6-2.7 it's i...
:active pseudo-class doesn't work in mobile safari
...l JS library called 'Fastclick'. It speed up click events on touch devices and takes care of this issue too.
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How can I be notified when an element is added to the page?
...he context of a browser extension, so the webpage runs independently of me and I cannot modify its source. What are my options here?
...
Why doesn't Haskell's Prelude.read return a Maybe?
...e shuffle. There should be such a function, although one is easy to write (and there are zillions of very similar versions floating around many codebases).
See also this discussion.
Personally, I use the version from the safe package.
...
Is it ok to use dashes in Python files when trying to import them?
...
You should check out PEP 8, the Style Guide for Python Code:
Package and Module Names Modules should have short, all-lowercase names. Underscores can be used in the module name if it improves readability. Python packages should also have short, all-lowercase names, although the use of undersco...