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Why use a prime number in hashCode?
...lipse to generate my hashCode() method there is always the prime number 31 used:
9 Answers
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Why does Java's hashCode() in String use 31 as a multiplier?
...ich I bought thanks to continual mentions on stackoverflow):
The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is...
JavaScript function to add X months to a date
...addMonths(new Date(2017,0,1),-1).toString());
// Subtract 2 months from 31 Jan 2017 -> 30 Nov 2016
console.log(addMonths(new Date(2017,0,31),-2).toString());
// Add 2 months to 31 Dec 2016 -> 28 Feb 2017
console.log(addMonths(new Date(2016,11,31),2).toString());
The above solu...
Why does !{}[true] evaluate to true in JavaScript?
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edited Oct 31 '13 at 9:53
answered Oct 31 '13 at 9:43
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PHP DateTime::modify adding and subtracting months
...reases the month number (originally 1) by one. This makes the date 2010-02-31.
The second month (February) only has 28 days in 2010, so PHP auto-corrects this by just continuing to count days from February 1st. You then end up at March 3rd.
How to get what you want:
To get what you want is by: ma...
How do I calculate the date in JavaScript three months prior to today?
... the previous month citation needed. But more than half the time, that is 31 days ago, not 30. And if today is the 31st of the month (and it isn't August or Decemeber), that day of the month doesn't exist in the previous month.
Interestingly, Google agrees with JavaScript if you ask it what day i...
string.Join on a List or other type
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answered Aug 31 '10 at 15:17
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How to convert DateTime to VarChar
...(nvarchar(MAX), @now, 130), 130
union select convert(nvarchar(MAX), @now, 131), 131
--132 not valid
order BY style
Here's the result
output style
Apr 28 2014 9:31AM 0
04/28/14 1
14.04.28 2
28/04/14 3
28.04.14 ...
How to add months to a date in JavaScript? [duplicate]
...ate = new Date(date.setMonth(date.getMonth()+8));
Old
From here:
var jan312009 = new Date(2009, 0, 31);
var eightMonthsFromJan312009 = jan312009.setMonth(jan312009.getMonth()+8);
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improv...
How to get the last day of the month?
...
>>> import calendar
>>> calendar.monthrange(2002,1)
(1, 31)
>>> calendar.monthrange(2008,2)
(4, 29)
>>> calendar.monthrange(2100,2)
(0, 28)
so:
calendar.monthrange(year, month)[1]
seems like the simplest way to go.
Just to be clear, monthrange supports leap...