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Why do we need boxing and unboxing in C#?
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double e = 2.718281828459045;
object o = e; // box
int ee = (int)o; // runtime exception
Instead you must do this:
double e = 2.718281828459045;
object o = e; // box
int ee = (int)(double)o;
First we have to explicitly unbox the double ((double)o) and then cast that to an int.
What is the res...
Unable to forward search Bash history similarly as with CTRL-r
...forward through the history.
The problem with Ctrl-S however is that sometimes collides with XON/XOFF flow control (in Konsole for instance). The searching is a readline feature however, and you should be able to bind it to some other key. Update: Simpler and better is just to disable XON/XOFF by ...
What is sharding and why is it important?
...scale applications, with lots of data. First, it helps minimizing response times for database queries. Second, you can use more cheaper, "lower-end" machines to host your data on, instead of one big server, which might not suffice anymore.
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Is Dvorak typing appropriate for programming? [closed]
...ent locations, they are different (US keyboard has no ´¨ç etc), and sometimes they even work differently! (In US keyboard there are no dead keys AFAIK, so one gets ~n instead of ñ, ^o instead of ô...)
– ANeves thinks SE is evil
Nov 11 '11 at 15:32
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What does it mean when MySQL is in the state “Sending data”?
...hat further explains that the reasoning is most likely because of a lot of time doing disk access: dev.mysql.com/doc/refman/5.0/en/general-thread-states.html
– Matthew Kolb
Jul 30 '13 at 22:06
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Is there a way to auto-adjust Excel column widths with pandas.ExcelWriter?
... for example: sf.apply_headers_style(Styler(bold=False)) it took me a long time to figure that out. And in the import statement, from StyleFrame import StyleFrame, Styler . here's all the options apart from bold: styleframe.readthedocs.io/en/2.0.5/…
– Nikhil VJ
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How to count the number of true elements in a NumPy bool array
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FWIW, numpy.count_nonzero is about a thousand times faster, in my Python interpreter, at least. python -m timeit -s "import numpy as np; bools = np.random.uniform(size=1000) >= 0.5" "np.count_nonzero(bools)" vs. python -m timeit -s "import numpy as np; bools = np.ran...
Is Python strongly typed?
...ange of type requires an explicit conversion.
Dynamic typing means that runtime objects (values) have a type, as opposed to static typing where variables have a type.
As for your example
bob = 1
bob = "bob"
This works because the variable does not have a type; it can name any object. After bob=...
jQuery same click event for multiple elements
...as variables (which is often a good idea if you're accessing them multiple times in a function body):
function disableMinHeight() {
var $html = $("html");
var $body = $("body");
var $slideout = $("#slideout");
$html.add($body).add($slideout).css("min-height", 0);
};
Takes advanta...
Indent multiple lines quickly in vi
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I often indent visual blocks multiple times in a row, such as fixing some tags pasted in to an XML file. Rather than re-select the block in visual mode each time, one can use 'gv' to reuse the last visual block. Reference superuser.com/questions/220666/…
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