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What issues should be considered when overriding equals and hashCode in Java?
...iki
18 revs, 10 users 77%Antti Sykäri
12
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What's the difference between equal?, eql?, ===, and ==?
... example, perform type conversion across ==, but not across eql?, so:
1 == 1.0 #=> true
1.eql? 1.0 #=> false
So you're free to override this for your own uses, or you can override == and use alias :eql? :== so the two methods behave the same way.
equal? — identity comparison
Unlike ...
How to round the corners of a button
...layer.borderColor=[uicolor blackColor].CGColor;
YourBtn1.layer.borderWidth=1.0f;
Swift 4 Solution
YourBtn1.layer.cornerRadius = YourBtn1.Frame.size.width/2
YourBtn1.layer.borderColor = UIColor.black.cgColor
YourBtn1.layer.borderWidth = 1.0
...
Understanding ibeacon distancing
...lculateAccuracy(int txPower, double rssi) {
if (rssi == 0) {
return -1.0; // if we cannot determine accuracy, return -1.
}
double ratio = rssi*1.0/txPower;
if (ratio < 1.0) {
return Math.pow(ratio,10);
}
else {
double accuracy = (0.89976)*Math.pow(ratio,7.7095) + 0.111; ...
Git: which is the default configured remote for branch?
...eady answered with a more useful answer.
– Austin Schäfer
Jul 11 '19 at 12:22
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Regular expression to match DNS hostname or IP Address?
... Non-latin (Punycoded) hostnames must be converted to ASCII form first (éxämplè.com = xn--xmpl-loa1ab.com) and then validated.
– Alix Axel
Jul 21 '13 at 8:36
6
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Float vs Decimal in ActiveRecord
... why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.10000000000000000555111512312578270211815834045" # not "0.1"!
whereas if you just do
irb:002:0> (1.0/10).to_s
=> "0.1" # the interprer rounds the number for you
So if you are dealing with small fra...
How to unescape HTML character entities in Java?
... @NickFrolov, your comments seem a bit messed up. auml is for instance ä and not д.
– aioobe
Oct 17 '16 at 1:52
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How can I measure the speed of code written in PHP? [closed]
...ts :-) sourceforge.net/projects/qcachegrindwin
– François Breton
Apr 25 '16 at 16:14
add a c...
Bash, no-arguments warning, and case decisions
... I used -z "$1" which was enough
– Jean-François Fabre♦
Sep 16 at 19:50
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