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How do I instantiate a Queue object in java?
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A Queue is an interface, which means you cannot construct a Queue directly.
The best option is to construct off a class that already implements the Queue interface, like one of the following: AbstractQueue, ArrayBlockingQueue,...
Show percent % instead of counts in charts of categorical variables
...o the ggplot syntax. Summing up the discussion in the comments above:
require(ggplot2)
require(scales)
p <- ggplot(mydataf, aes(x = foo)) +
geom_bar(aes(y = (..count..)/sum(..count..))) +
## version 3.0.0
scale_y_continuous(labels=percent)
Here's a reproducible ...
How to save a dictionary to a file?
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save_obj seems to require that the file obj/'+ name + '.pkl already exist. I created a dictionary named Q, populated it, and made the call save_obj(Q, "Qtable") I got an error: FileNotFoundError: [Errno 2] No such file or directory: 'obj/Qtable....
When to encode space to plus (+) or %20?
...ans a space only in application/x-www-form-urlencoded content, such as the query part of a URL:
http://www.example.com/path/foo+bar/path?query+name=query+value
In this URL, the parameter name is query name with a space and the value is query value with a space, but the folder name in the path is ...
python-pandas and databases like mysql
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As Wes says, io/sql's read_sql will do it, once you've gotten a database connection using a DBI compatible library. We can look at two short examples using the MySQLdb and cx_Oracle libraries to connect to Oracle and MySQL and query their da...
How can I close a buffer without closing the window?
...u with a new blank buffer.
Throw this in your .vimrc:
map <leader>q :bp<bar>sp<bar>bn<bar>bd<CR>
Restart Vim, or just :source ~/.vimrc for changes to take effect. Next time you want to close a buffer just type: \q (if \ is your leader key)
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Read a variable in bash with a default value
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edited Aug 18 at 1:01
squarecandy
3,68711 gold badge2626 silver badges3838 bronze badges
answered Apr 15 '10 at 3:45
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Pointer expressions: *ptr++, *++ptr and ++*ptr
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The side effect of a postfix increment expression
1. Precedence. A quick glance at the precedence table for operators will tell you that postfix increment has a higher precedence (16) than dereference / indirection (15). This means that the complex expression *p++ is going to be grouped as: ...
Why are there two ways to unstage a file in Git?
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With this many votes on both question and answer, I would say that apparently we want to have an unstage command in git.
– milosmns
Mar 20 '19 at 13:19
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