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Why can't decimal numbers be represented exactly in binary?
...to SO about floating-point representation. For example, the decimal number 0.1 doesn't have an exact binary representation, so it's dangerous to use the == operator to compare it to another floating-point number. I understand the principles behind floating-point representation.
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RegEx for Javascript to allow only alphanumeric
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/^[a-z0-9]+$/i
^ Start of string
[a-z0-9] a or b or c or ... z or 0 or 1 or ... 9
+ one or more times (change to * to allow empty string)
$ end of string
/i case-insensitive
Update (supporting ...
How to create a loop in bash that is waiting for a webserver to respond?
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10
The use of backticks ` ` is outdated. Use $( ) instead.
– Serge Stroobandt
Apr 18 '14 at 15:37
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Which iOS app version/build number(s) MUST be incremented upon App Store release?
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10 Answers
10
Active
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targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionVi
...m I have this...
- (void)awakeFromNib
{
self.itemSize = CGSizeMake(75.0, 75.0);
self.minimumInteritemSpacing = 10.0;
self.minimumLineSpacing = 10.0;
self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
self.sectionInset = UIEdgeInsetsMake(10.0, 10.0, 10.0, 10.0);
}
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Evaluating a mathematical expression in a string
...ath
import operator
__author__ = 'Paul McGuire'
__version__ = '$Revision: 0.0 $'
__date__ = '$Date: 2009-03-20 $'
__source__ = '''http://pyparsing.wikispaces.com/file/view/fourFn.py
http://pyparsing.wikispaces.com/message/view/home/15549426
'''
__note__ = '''
All I've done is rewrap Paul McGuire's ...
How ListView's recycling mechanism works
...rve that in my code. If you had a checkbox and if you check it at position 0(let's say item1 had a checkbox and you checked it) so when you scroll down you will see item 8 checkbox already checked, this is why listview is re using the same view, not creating a new for you due to performance optimiza...
Does .NET have a way to check if List a contains all items in List b?
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answered Oct 5 '09 at 15:06
Jon SkeetJon Skeet
1211k772772 gold badges85588558 silver badges88218821 bronze badges
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Scala list concatenation, ::: vs ++
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Zoltán
18.3k1010 gold badges7878 silver badges120120 bronze badges
answered Jul 2 '11 at 23:15
Daniel C. SobralDan...
DbArithmeticExpression arguments must have a numeric common type
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edited Dec 14 '17 at 11:03
community wiki
7 r...