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edited Jul 14 '16 at 18:05
John Weisz
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answer...
How does collections.defaultdict work?
...efault items are created using int(), which will return the integer object 0. For the second example, default items are created using list(), which returns a new empty list object.
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tmux: How to join two tmux windows into one, as panes?
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170
Actually I found the way to do that. Suppose the two windows are number 1 and 2. Use
join-pane ...
Generating random numbers in Objective-C
...a head mainly, and I want a way to generate a pseudo-random number between 0 and 74. In Java I would use the method:
13 Ans...
How to read a .xlsx file using the pandas Library in iPython?
... for sheet_name in xl_file.sheet_names}
Update: In pandas version 0.21.0+ you will get this behavior more cleanly by passing sheet_name=None to read_excel:
dfs = pd.read_excel(file_name, sheet_name=None)
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecat...
Print an integer in binary format in Java
...
Assuming you mean "built-in":
int x = 100;
System.out.println(Integer.toBinaryString(x));
See Integer documentation.
(Long has a similar method, BigInteger has an instance method where you can specify the radix.)
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Python list iterator behavior and next(iterator)
...tion to i being printed each iteration:
>>> a = iter(list(range(10)))
>>> for i in a:
... print(i)
... next(a)
...
0
1
2
3
4
5
6
7
8
9
So 0 is the output of print(i), 1 the return value from next(), echoed by the interactive interpreter, etc. There are just 5 iterations, ...
How to get the name of the calling method?
...
puts caller[0]
or perhaps...
puts caller[0][/`.*'/][1..-2]
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What's the difference between echo, print, and print_r in PHP?
...s you have in your variables. Consider this test program:
$values = array(0, 0.0, false, '');
var_dump($values);
print_r ($values);
With print_r you can't tell the difference between 0 and 0.0, or false and '':
array(4) {
[0]=>
int(0)
[1]=>
float(0)
[2]=>
bool(false)
[3]=...
Why doesn't println! work in Rust unit tests?
...in.rs; ./main
running 1 test
test test ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured
% ./main --nocapture
running 1 test
Hidden output
test test ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured
% cargo test -- --nocapture
running 1 test
Hidden output
test ...