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How to select multiple rows filled with constants?
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SELECT 1, 2, 3
UNION ALL SELECT 4, 5, 6
UNION ALL SELECT 7, 8, 9
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How to pipe list of files returned by find command to cat to view all the files
...ipe it to another utility like cat (so that cat displays the contents of all those files) and basically need to grep something from these files.
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How to list all the available keyspaces in Cassandra?
...y the schema_keyspaces table in the system keyspace. There's also a table called schema_columnfamilies which contains information about all tables.
The DESCRIBE and SHOW commands only work in cqlsh and cassandra-cli.
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Convert data.frame column format from character to factor
...e to the world of R.
mtcars #look at this built in data set
str(mtcars) #allows you to see the classes of the variables (all numeric)
#one approach it to index with the $ sign and the as.factor function
mtcars$am <- as.factor(mtcars$am)
#another approach
mtcars[, 'cyl'] <- as.factor(mtcars[...
How to view corresponding SQL query of the Django ORM's queryset?
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You also can use python logging to log all queries generated by Django. Just add this to your settings file.
LOGGING = {
'disable_existing_loggers': False,
'version': 1,
'handlers': {
'console': {
# logging handler that outputs log...
How can I upgrade specific packages using pip and a requirements file?
...de Django to 1.2.4 - I was always finishing with 1.2.3 version, so I uninstalled Django with:
<virtualenv>/bin/pip uninstall Django
Then I removed <virtualenv>/build/Django directory and finally I installed the proper version with:
<virtualenv>/bin/pip install Django
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Log all queries in mysql
... following in your my.cnf file:
log = log_file_name
Either one will log all queries to log_file_name.
You can also log only slow queries using the --log-slow-queries option instead of --log. By default, queries that take 10 seconds or longer are considered slow, you can change this by setting l...
Hide all but $(this) via :not in jQuery selector
...d, if you're clicking something within the table to try and get it to hide all the table rows EXCLUDING the row containing the item you clicked, use: $('tr').not($(this).closest('tr')).hide();
– Jimbo
Jan 18 '13 at 12:54
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Encode html entities in javascript
I am working in a CMS which allows users to enter content. The problem is that when they add symbols ® , it may not display well in all browsers. I would like to set up a list of symbols that must be searched for, and then converted to the corresponding html entity. For example
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support FragmentPagerAdapter holds reference to old fragments
... fragments that have been added to the fragment manager are saved automatically. Even if your app is killed, this information is restored when you relaunch your app.
Now consider that you have viewed a few pages, Fragments A, B and C. You know that these have been added to the fragment manager. Bec...