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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
...il return. It then goes on and returns an empty array if the second arg is set to zero. while if 5 is passed in, there are not 5 elements in the array, so it returns nil before the zero arg is evaluated. code here at line 944.
I believe this to be a bug, or at least unpredictable and not the 'Princ...
How does Java Garbage Collection work with Circular References?
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A garbage collector starts from some "root" set of places that are always considered "reachable", such as the CPU registers, stack, and global variables. It works by finding any pointers in those areas, and recursively finding everything they point at. Once it's found ...
c# datatable to csv
...e code below does is programmatically create a DataGridView on the fly and set the DataGridView.DataSource to the DataTable. Next, I programmatically select all the cells (including the header) in the DataGridView and call DataGridView.GetClipboardContent(), placing the results into the Windows Clip...
Find full path of the Python interpreter?
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It seems that _ is set by the shell. But it need not be set, so this could give the wrong answer.
– vy32
Sep 23 '15 at 0:40
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How to pass json POST data to Web API method as an object?
...ct the ajax request's headers, you can see that the Content-Type value is set as application/json.
If you do not specify contentType explicitly, It will use the default content type which is application/x-www-form-urlencoded;
Edit on Nov 2015 to address other possible issues raised in comments...
When should I use a List vs a LinkedList
... position i:
update the pointer in member i-1 to point to the new member
set the pointer in the new member to point to member i
The disadvantage to a linked list is that random access is not possible. Accessing a member requires traversing the list until the desired member is found.
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Initializing a list to a known number of elements in Python [duplicate]
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10 loops, best of 3: 177 ms per loop
Comparison to numpy
For huge data set numpy or other optimized libraries are much faster:
from numpy import ndarray, zeros
%timeit empty((N,))
1000000 loops, best of 3: 788 ns per loop
%timeit zeros((N,))
100 loops, best of 3: 3.56 ms per loop
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Implicit type conversion rules in C++ operators
...ermined from the observable behavior of the program.
The compiler cannot set an int to be 8 bits in size, even if it were the fastest, since the standard mandates a 16-bit minimum int.
Therefore, in the case of a theoretical computer with super-fast 8-bit operations, the implicit promotion to int...
Do checkbox inputs only post data if they're checked?
...e user. A switch is "on" when the control element's checked
attribute is set. When a form is submitted, only "on" checkbox
controls can become successful.
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are there dictionaries in javascript like python?
...ocat states. Look up the details in MDN. Example:
let map = new Map();
map.set('key', {'value1', 'value2'});
let values = map.get('key');
Without support for ES6 you can try using objects:
var x = new Object();
x["Key"] = "Value";
However with objects it is not possible to use typical array proper...