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Ruby class types and case statements
... the when clause. In Ruby
case item
when MyClass
...
when Array
...
when String
...
is really
if MyClass === item
...
elsif Array === item
...
elsif String === item
...
Understand that case is calling a threequal method (MyClass.===(item) for example), and that method can be defined to do wha...
Android - Handle “Enter” in an EditText
..., all on TextView.
For changing the text of the "Done" button to a custom string, use:
mEditText.setImeActionLabel("Custom text", KeyEvent.KEYCODE_ENTER);
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...
Linq: GroupBy, Sum and Count
... ProductName = cl.First().Name,
Quantity = cl.Count().ToString(),
Price = cl.Sum(c => c.Price).ToString(),
}).ToList();
The use of First() here to get the product name assumes that every product with the same product code has the same product name....
Save classifier to disk in scikit-learn
...ed scikit-learn estimators, but can only
pickle to the disk and not to a string:
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Exclude a sub-directory using find
...
-path matches the whole string, so if you're doing find ., then your -path strings need to be ./path/to/directory/*
– Heath Borders
Nov 14 '14 at 22:34
...
Unfortunately MyApp has stopped. How can I solve this?
...ked on the blue link it gave me, and it took me here:
mTextView.setText(myString);
So, now I want to debug. According to this StackOverflow question, a NullPointerException says that something is null.
So, let's find out what is null. There's two possibilities. Either mTextView is null, or myStr...
error: ‘NULL’ was not declared in this scope
...
NULL can also be found in:
#include <string.h>
String.h will pull in the NULL from somewhere else.
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fo...
Declare slice or make slice?
...
Can i say the same for map? var m map[string]int vs m:= make(map[string]int) ? Thanks.
– joshua
Mar 6 '15 at 7:46
11
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What's the difference between struct and class in .NET?
... its own copy.
This can be shown with an example:
struct MyStruct
{
string MyProperty { get; set; }
}
void ChangeMyStruct(MyStruct input)
{
input.MyProperty = "new value";
}
...
// Create value type
MyStruct testStruct = new MyStruct { MyProperty = "initial value" };
ChangeMyStruct(...
Where are static variables stored in C and C++?
...-------------------------
Const Data The const data area stores string literals and
other data whose values are known at compile
time. No objects of class type can exist in
this area. All data in this area is available
...