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Common MySQL fields and their appropriate data types
...e specific - and storage is not the only cost. Sorting data and temporary tables (memory engine) will use the fixed amount.
– Morgan Tocker
Sep 17 '10 at 15:34
...
What are the differences between segment trees, interval trees, binary indexed trees and range trees
...n add anything to Lior's answer, but it seems like it could do with a good table.
One Dimension
k is the number of reported results
| | Segment | Interval | Range | Indexed |
|--------------|--------------:|-----------:|---------------:|----------:|
|Preprocessing ...
When to use SELECT … FOR UPDATE?
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The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE.
However in some systems locking is a side effect of concurr...
Pandas every nth row
...2nd row it would be df.iloc[1::5, :].
– Little Bobby Tables
Nov 13 '16 at 17:18
17
You can omit t...
What's the difference between `on` and `live` or `bind`?
...p imbrication (<body><div><div><div><div><table><table><tbody><tr><td><div><div><div><ul><li><button> etc etc etc...)
So, bind, like click, like other shortcut event binders attach directly to the event ...
AWS MySQL RDS vs AWS DynamoDB [closed]
I've been using MySQL for a fair while now and I'm comfortable with its structure & SQL Queries etc.
4 Answers
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How can I remove the search bar and footer added by the jQuery DataTables plugin?
I am using jQuery DataTables .
18 Answers
18
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rake db:schema:load vs. migrations
...n (very similar to your schema.rb file) and updating the schema_migrations table to reflect this change. Be very careful when doing this! You can easily delete your production data if you aren't careful.
As a side note, I strongly believe that you should never put data creation in the migration fil...
Interface or an Abstract Class: which one to use?
...along a particular path. Other times it would be bad. Imagine if PHP's Countable and Iterator interfaces were abstract classes instead of interfaces.
One approach that's common when you're uncertain which way to go (as mentioned by cletus below) is to create an interface, and then have your abstr...
Determine the data types of a data frame's columns
...- lapply(frame, class)
res_frame <- data.frame(unlist(res))
barplot(table(res_frame), main="Data Types", col="steelblue", ylab="Number of Features")
}
to produce a plot of all data types in your data frame. For the iris dataset we get the following:
data_types(iris)
...