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How to print a float with 2 decimal places in Java?
...
Please be carefull as String.format depend on your current Local configuration, you may not get a dot as a separator. Prefer using String.format(java.util.Locale.US,"%.2f", val);
– Gomino
Mar 2 '16 at 16:59
...
In Functional Programming, what is a functor?
...llection. The type of the full collection is then something like T Int, T String, T Bool, if you are containing integers, strings, or Booleans respectively. If the element type is unknown, it is written as a type parameter a, as in T a.
Examples include lists (zero or more elements of type a), th...
Is there a fixed sized queue which removes excessive elements?
...for a queue with max 10 elements:
queue = new LinkedHashMap<Integer, String>()
{
@Override
protected boolean removeEldestEntry(Map.Entry<Integer, String> eldest)
{
return this.size() > 10;
}
};
If the "removeEldestEntry" returns true, the eldest...
Scatterplot with too many points
...+ geom_point(alpha = 0.3)
Another convenient way to deal with this is (and probably more appropriate for the number of points you have) is hexagonal binning:
ggplot(df,aes(x=x,y=y)) + stat_binhex()
And there is also regular old rectangular binning (image omitted), which is more like your tr...
Java - How to create new Entry (key, value)
...alue = value;
return old;
}
}
And then use it:
Map.Entry<String, Object> entry = new MyEntry<String, Object>("Hello", 123);
System.out.println(entry.getKey());
System.out.println(entry.getValue());
...
What is the difference between Serializable and Externalizable in Java?
... code:
public class MyExternalizable implements Externalizable
{
private String userName;
private String passWord;
private Integer roll;
public MyExternalizable()
{
}
public MyExternalizable(String userName, String passWord, Integer roll)
{
this.userName = userName;
this.passWord = pass...
Constructors in Go
...n.
Supposing you have a struct like this :
type Thing struct {
Name string
Num int
}
then, if the zero values aren't fitting, you would typically construct an instance with a NewThing function returning a pointer :
func NewThing(someParameter string) *Thing {
p := new(Thing)
...
What happens if you call erase() on a map element while iterating from begin to end?
...ng erase. At this point it is too late and is already invalidated.
map<string, SerialdMsg::SerialFunction_t>::iterator pm_it = port_map.begin();
while(pm_it != port_map.end())
{
if (pm_it->second == delete_this_id)
{
port_map.erase(pm_it++); // Use iterator.
...
Creating JSON on the fly with JObject
...perties.
This is a Sample User Properties
public class User
{
public string Name;
public string MobileNo;
public string Address;
}
and i want this property in newtonsoft JObject is:
JObject obj = JObject.FromObject(new User()
{
Name = "Manjunath",
MobileNo = "9876543210",
...
How do I write outputs to the Log in Android?
...ery long. You can define somewhere in your class:
private static final String TAG = "myApp";
and use it when debugging
Log.v(TAG, "did something");
You can apply as well a Filter to only search for the tag.
sha...