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How do I sort a list of dictionaries by a value of the dictionary?
..." % (elem['age'], elem['name']))
It is rather hackish, since it relies on converting the values into a single string representation for comparison, but it works as expected for numbers including negative ones (although you will need to format your string appropriately with zero paddings if you are ...
Number of days in particular month of particular year?
...r of days in that month
YearMonth yearMonthObject = YearMonth.of(1999, 2);
int daysInMonth = yearMonthObject.lengthOfMonth(); //28
Test: try a month in a leap year:
yearMonthObject = YearMonth.of(2000, 2);
daysInMonth = yearMonthObject.lengthOfMonth(); //29
Java 7 and earlier
Create a calen...
How do I put a border around an Android textview?
...id:background="@drawable/back"/>
And rectangle drawable back.xml (put into res/drawable folder):
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="@android:color/white" />
<stroke android:width="1dip" androi...
Scala constructor overload?
... they can in Java. This ensures that the primary constructor is the sole point of entry to the class.
class Foo(x: Int, y: Int, z: String) {
// default y parameter to 0
def this(x: Int, z: String) = this(x, 0, z)
// default x & y parameters to 0
// calls previous auxiliary constr...
How do I add 1 day to an NSDate?
...t nextDate = theCalendar.date(byAdding: dayComponent, to: Date())
print("nextDate : \(nextDate)")
Objective C :
NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
dayComponent.day = 1;
NSCalendar *theCalendar = [NSCalendar currentCalendar];
NSDate *nextDate = [theCalendar d...
How to refresh app upon shaking the device?
...
Here is an example code.
Put this into your activity class:
/* put this into your activity class */
private SensorManager mSensorManager;
private float mAccel; // acceleration apart from gravity
private float mAccelCurrent; // current acceleration in...
What's the nearest substitute for a function pointer in Java?
...e line of code. This is a perfect application for passing in a function pointer to replace that one line, but Java doesn't have function pointers. What's my best alternative?
...
What is the use of the ArraySegment class?
...ollection<T>
as opposed to the .NET 4 version which implemented no interfaces whatsoever.
The class is now able to take part in the wonderful world of LINQ so we can do the usual LINQ things like query the contents, reverse the contents without affecting the original array, get the first it...
Can I use a collection initializer for Dictionary entries?
...
var names = new Dictionary<int, string> {
{ 1, "Adam" },
{ 2, "Bart" },
{ 3, "Charlie" }
};
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What's the best way to inverse sort in scala?
..._.size).reverse)
Maybe not the shortest to write (compared to minus) but intent is clear
Update
The last line does not work. To accept the _ in Ordering.by(_.size), the compiler needs to know on which type we are ordering, so that it may type the _. It may seems that would be the type of the ele...