keyset Questions
2
Solved
I need to know how to retrieve the key set of a table in lua. for example, if I have the following table:
tab = {}
tab[1]='a'
tab[2]='b'
tab[5]='e'
I want to be retrieve a table that looks like ...
2
Solved
JDK 8 on mac OS, looking at following code from HashMap.java:
public Set<K> keySet() {
Set<K> ks = keySet;
if (ks == null) {
ks = new KeySet();
keySet = ks;
}
return ks;
}...
5
Solved
If I iterate over the key set of a WeakHashMap, do I need to check for null values?
WeakHashMap<MyObject, WeakReference<MyObject>> hm
= new WeakHashMap<MyObject, WeakReference<M...
Proudlove asked 28/5, 2011 at 0:45
5
Solved
I put a string array elements is a map where elements of string array is key and frequency of word is value, e.g.:
String[] args = {"if","it","is","to","be","it","is","up","me","to","delegate"};
...
Pyle asked 22/1, 2012 at 16:11
3
Solved
Regarding the Map<K,V> interface:
Why does keySet() return a Set that supports the remove operation but doesn't support add() and addAll() operations?
Sheba asked 31/5, 2015 at 7:50
7
Solved
I have the following Java code:
public void myMethod (final Map pFeatureGroupsFromPackage) {
final Set<String> keys = pFeatureGroupsFromPackage.keySet();
for (final String key : keys) {
...
Tasteless asked 25/3, 2011 at 9:54
1
Solved
This question is more about design implementation by Java developers. I want to know (if there any vital reason that I cannot think of) why Keyset() returns a set-view but values() returns Collecti...
Squaw asked 3/1, 2014 at 21:15
3
Solved
I have the following code but i saw that retrieving values from a Map while iterating over the Map keys with keySet() is a mistake even with findBugs i get the warning WMI_WRONG_MAP_ITERATOR
for(S...
1
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