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Group a list of objects by an attribute : Java
...add the students object to the HashMap with locationID as key.
HashMap<Integer, List<Student>> hashMap = new HashMap<Integer, List<Student>>();
Iterate over this code and add students to the HashMap:
if (!hashMap.containsKey(locationId)) {
List<Student> list = n...
How to get a pixel's x,y coordinate color from an image?
... 4) {
console.log pix[i+3]
}
This will go row by row, so you'd need to convert that into an x,y and either convert the for loop to a direct check or run a conditional inside.
Reading your question again, it looks like you want to be able to get the point that the person clicks on. This can be d...
Best practice for creating millions of small temporary objects
...
Experiment with the Java heap size to try to find a point where full garbage collection is rare. In Java 7 the new G1 GC is faster in some cases (and slower in others).
– Michael Shopsin
May 8 '13 at 15:21
...
How do I pass a class as a parameter in Java?
...on
import java.lang.reflect.*;
public class method2 {
public int add(int a, int b)
{
return a + b;
}
public static void main(String args[])
{
try {
Class cls = Class.forName("method2");
Class partypes[] = new Class[2];
...
Working Soap client example
...r WS, change the parameters below, which are:
- the SOAP Endpoint URL (that is, where the service is responding from)
- the SOAP Action
Also change the contents of the method createSoapEnvelope() in this class. It constructs
the inner part of the S...
How to set selected item of Spinner by value, not by position?
...pdown_item);
mSpinner.setAdapter(adapter);
if (compareValue != null) {
int spinnerPosition = adapter.getPosition(compareValue);
mSpinner.setSelection(spinnerPosition);
}
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Android: how to check if a View inside of ScrollView is visible?
...{
@Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
if (myBtn1 != null) {
if (myBtn1.getLocalVisibleRect(scrollBounds)) {
if (!myBtn1.getLocalVisibleRect(scrollBounds)...
Why is there no std::stou?
...std::sto* functions mirror strto*, and the std::to_string functions use sprintf.
Edit: As KennyTM points out, both stoi and stol use strtol as the underlying conversion function, but it is still mysterious why while there exists stoul that uses strtoul, there is no corresponding stou.
...
For-each over an array in JavaScript
...tly (ES2015+)
See #4.
Create a true array
Other times, you may want to convert an array-like object into a true array. Doing that is surprisingly easy:
Use the slice method of arrays
We can use the slice method of arrays, which like the other methods mentioned above is "intentionally generic"...
UITableViewHeaderFooterView: Unable to change background color
...
You should either use myTableViewHeaderFooterView.tintColor, or assign a custom background view to myTableViewHeaderFooterView.backgroundView.
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