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Java Generics (Wildcards)
... E, we can get elements out of the structure, but we cannot put
elements into the structure
List<Integer> ints = new ArrayList<Integer>();
ints.add(1);
ints.add(2);
List<? extends Number> nums = ints;
nums.add(3.14); // compile-time error
assert ints.toString().equals("[1, 2, 3...
What does java.lang.Thread.interrupt() do?
Could you explain what java.lang.Thread.interrupt() does when invoked?
9 Answers
9
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object==null or null==object?
...= object, the program is not going to work as expected! Then there is no point in following this convention!
– VanagaS
May 6 '17 at 3:59
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Histogram using gnuplot?
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I think @ChrisW's answer below brings an important point to notice for anyone who wants to make a Histogram in Gnuplot.
– Abhinav
Oct 26 '13 at 2:49
2
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List passed by ref - help me explain this behaviour
...u call ChangeList the value of the variable (i.e. the reference - think "pointer") is copied - and changes to the value of the parameter inside ChangeList aren't seen by TestMethod.
try:
private void ChangeList(ref List<int> myList) {...}
...
ChangeList(ref myList);
This then passes a refe...
DateTime.Now vs. DateTime.UtcNow
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As you can see here, comparisons and math functions don't automatically convert to compatible times. The Timespan should have been almost one hour, but instead was almost 6. "utc < now" should have been true (I even added an hour to be sure), but was still false.
You can also see the 'work ...
Android – Listen For Incoming SMS Messages
...ces preferences;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){
Bundle bundle = intent.getExtras(); //---get the SMS message...
How to pretty print nested dictionaries?
...ainst it is that it don't produce a valid python string, but can almost be converted back in python.
– y.petremann
Oct 6 '14 at 4:49
1
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Escape single quote character for use in an SQLite query
... Also, depending on the lifetime of the string, the first step might be to convert '' to ' before doubling them up again.
– Gary Z
Jul 11 '18 at 0:16
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How do you concatenate Lists in C#?
...ne I think so. As previously said, Concat returns a new sequence and while converting the result to List, it does the job perfectly.
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