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Representing graphs (data structure) in Python
...should be expressed only in terms of existence, or whether they carry some extra information.
From Python built-in data types point-of-view, any value contained elsewhere is expressed as a (hidden) reference to the target object. If it is a variable (i.e. named reference), then the name and the ref...
TypeScript sorting an array
...g anything else, you'll need to convert the comparison into a number.
var stringArray: string[] = ['AB', 'Z', 'A', 'AC'];
var sortedArray: string[] = stringArray.sort((n1,n2) => {
if (n1 > n2) {
return 1;
}
if (n1 < n2) {
return -1;
}
return 0;
});
...
Return multiple values to a method caller
... that C# 7 has been released, you can use the new included Tuples syntax
(string, string, string) LookupName(long id) // tuple return type
{
... // retrieve first, middle and last from data storage
return (first, middle, last); // tuple literal
}
which could then be used like this:
var n...
Eclipse copy/paste entire line keyboard shortcut
... @user1278890 Sure, that might be considered both inconvenience or extra advantage :) Thanks for your feedback!
– beam022
Nov 24 '16 at 9:57
...
How to add and get Header values in WebApi
...r headers = re.Headers;
if (headers.Contains("Custom"))
{
string token = headers.GetValues("Custom").First();
}
return null;
Output -
share
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...
Creation timestamp and last update timestamp with Hibernate and MySQL
...ate LocalDateTime createdOn;
@Column(name = "created_by")
private String createdBy;
@Column(name = "updated_on")
@UpdateTimestamp
private LocalDateTime updatedOn;
@Column(name = "updated_by")
private String updatedBy;
//Getters and setters omitted for brevity
}
...
What is a raw type and why shouldn't we use it?
...ass Inner { }
static class Nested { }
public static void main(String[] args) {
MyType mt; // warning: MyType is a raw type
MyType.Inner inn; // warning: MyType.Inner is a raw type
MyType.Nested nest; // no warning: not parameterized type
MyTyp...
Javascript Equivalent to C# LINQ Select
...;
An extended version that uses the function constructor if you pass a string. Something to play around with perhaps:
Array.prototype.select = function(expr){
var arr = this;
switch(typeof expr){
case 'function':
return $.map(arr, expr);
break;
...
How to get package name from anywhere?
...he main activity's onCreate() method:
Global to the class:
public static String PACKAGE_NAME;
Then..
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
PACKAGE_NAME = getApplicationContext().getPackageName(...
what exactly is device pixel ratio?
...x image. Bigger image, but it looks better since the display has all those extra pixels. This is the idea behind "Retina Displays".
– Jake Wilson
Jan 6 '16 at 18:37
...