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Why is data.entrySet().iterator() ordered in a different order, compared to the HashMap<Long, String> data?


Why is data.entrySet().iterator() ordered in a different order, compared to the HashMap<Long, String> data?

By : Maxi Krautzik
Date : November 22 2020, 11:12 AM
it fixes the issue HashMap documentation says that
code :


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How to iterate a HashMap using the natural entrySet() order?

How to iterate a HashMap using the natural entrySet() order?


By : user3407222
Date : March 29 2020, 07:55 AM
help you fix your problem Use TreeMap:
how to suppress Inefficient use of keySet iterator instead of entrySet iterator in findbugs?

how to suppress Inefficient use of keySet iterator instead of entrySet iterator in findbugs?


By : Brandon Davies-Sekle
Date : March 29 2020, 07:55 AM
it should still fix some issue You can annotate a class/method/field with @SuppressFBWarnings and the bug to ignore from the FindBugs bug descriptions list.
code :
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

class MyBuggyClass
{
    @SuppressFBWarnings("URF_UNREAD_FIELD")
    private int unreadField;

    @SuppressFBWarnings("WMI_WRONG_MAP_ITERATOR")
    public void useKeySet() { ... }
}
Sonar Violation : Inefficient use of keySet iterator instead of entrySet iterator

Sonar Violation : Inefficient use of keySet iterator instead of entrySet iterator


By : Jayasree Sengupta
Date : March 29 2020, 07:55 AM
I wish this help you Map.entrySet() returns the type Set. Map.Entry is used to hold together each key and the value associated. Since it is possible to iterate over a Set with a traditional for-each loop, you can rewrite your for loop like this:
code :
for (Map.Entry<String, Setting> entry : settings.entrySet()) {
    properties.setProperty(entry.getKey(), entry.getValue().getValue());
}
How to order a data frame using a string vector with the names of the columns to be ordered?

How to order a data frame using a string vector with the names of the columns to be ordered?


By : Ashwani Patti
Date : March 29 2020, 07:55 AM
hope this fix your issue Lets assume the data looks like this: , You could do this using get:
code :
df3[with(df3, order(get(IDS))), ]
What's the different between the result of HashMap.entrySet() and LinkedHashMap.entrySet(),do they have the same perform

What's the different between the result of HashMap.entrySet() and LinkedHashMap.entrySet(),do they have the same perform


By : Salvador Alberto Flo
Date : March 29 2020, 07:55 AM
help you fix your problem Looking at the code (Java 8), in both cases entrySet() returns an instance of an inner class of the corresponding Map implementation :
For LinkedHashMap :
code :
public Set<Map.Entry<K,V>> entrySet() {
    Set<Map.Entry<K,V>> es;
    return (es = entrySet) == null ? (entrySet = new LinkedEntrySet()) : es;
}
public Set<Map.Entry<K,V>> entrySet() {
    Set<Map.Entry<K,V>> es;
    return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
}
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