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Why use a prime number in hashCode?
...wer of two, which permits for bitwise optimization
Here's the full quote, from Item 9: Always override hashCode when you override equals:
The value 31 was chosen because it's an odd prime. If it were even and multiplication overflowed, information would be lost, as multiplication by 2 is equivalen...
How to detect responsive breakpoints of Twitter Bootstrap 3 using JavaScript?
...g RBT in head section, instead of body? That would prevent visibility divs from being added to body, thus breaking the functionality.
– Maciej Gurban
Apr 30 '15 at 8:17
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Passing Objects By Reference or Value in C#
... of getting to an object (or null). Changes to that object will be visible from the caller. However, changing the value of the parameter to refer to a different object will not be visible when you're using pass by value, which is the default for all types.
If you want to use pass-by-reference, you ...
How do I write data into CSV format as string (not file)?
...
since i use this quite a lot to stream results asynchronously from sanic back to the user as csv data i wrote the following snippet for Python 3.
The snippet lets you reuse the same StringIo buffer over and over again.
import csv
from io import StringIO
class ArgsToCsv:
def __i...
To draw an Underline below the TextView in Android
... the text in TextView.
SpannableString
setPaintFlags(); of TextView
Html.fromHtml();
Let me explain you all approaches :
1st Approach
For underling the text in TextView you have to use SpannableString
String udata="Underlined Text";
SpannableString content = new SpannableString(udata);
conten...
How can I round up the time to the nearest X minutes?
...
Example:
var dt1 = RoundUp(DateTime.Parse("2011-08-11 16:59"), TimeSpan.FromMinutes(15));
// dt1 == {11/08/2011 17:00:00}
var dt2 = RoundUp(DateTime.Parse("2011-08-11 17:00"), TimeSpan.FromMinutes(15));
// dt2 == {11/08/2011 17:00:00}
var dt3 = RoundUp(DateTime.Parse("2011-08-11 17:01"), TimeSp...
Why an interface can not implement another interface?
...mplementation if you wish (in this case it won't remain 100% abstract), so from the JVM's perspective they are different things.
Also the member variable in a 100% abstract class can have any access qualifier, where in an interface they are implicitly public static final.
...
How to deal with page breaks when printing a large HTML table
...nÜnür It's not a requirement, so you can't rely on it, and unfortunately from my testing I can see that webkit saw "may" and ignored anything beyond it. Strangely, IE's got some rather nice large table printing support. Never thought I'd sing its praises on any given point.
–...
How to escape special characters in building a JSON string?
.... If you simply use language or library functions to convert things to and from JSON, you'll never even need to know JSON's escaping rules. This is what the misguided question asker here ought to have done.
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What is the difference between a mutable and immutable string in C#?
...to make a copy of it if you want to be absolutely sure it won't change out from under you. This is why mutable objects are dangerous to use as keys into any form of Dictionary or set- the objects themselves could change, and the data structure would have no way of knowing, leading to corrupt data th...