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List of zeros in python [duplicate]
...tertools.repeat and [0] * n will create lists whose elements refer to same id. This is not a problem with immutable objects like integers or strings but if you try to create list of mutable objects like a list of lists ([[]] * n) then all the elements will refer to the same object.
a = [[]] * 10
a...
What are “res” and “req” parameters in Express functions?
.... You could change that code to this if it's more clear:
app.get('/user/:id', function(request, response){
response.send('user ' + request.params.id);
});
Edit:
Say you have this method:
app.get('/people.json', function(request, response) { });
The request will be an object with properties...
Dropping Unique constraint from MySQL table
...nds to your MySQL server version for the right syntax to use near '(player_id,year,tournament)' at line 1"
– Ankur Mukherjee
Aug 15 '10 at 14:56
1
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Why would an Enum implement an Interface?
...ple here is wrong, since Enum already implements that. You can't even override it.
A better example is having an interface that defines, let's say, a data type. You can have an enum to implement the simple types, and have normal classes to implement complicated types:
interface DataType {
// met...
How to select/get drop down option in Selenium 2
...lement salesExecutiveDropDown = new SelectElement(webDriver.FindElement(By.Id("salesExecutiveId")));
– Jeremy McGee
Jul 22 '13 at 14:21
...
How to use shared memory with Linux in C
...e <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
void* create_shared_memory(size_t size) {
// Our memory buffer will be readable and writable:
int protection = PROT_READ | PROT_WRITE;
// The buffer will be shared (meaning other processes can access it), but
// anonym...
When should I use GET or POST method? What's the difference between them?
...a matter of security. The HTTP protocol defines GET-type requests as being idempotent, while POSTs may have side effects. In plain English, that means that GET is used for viewing something, without changing it, while POST is used for changing something. For example, a search page should use GET, wh...
How to align 3 divs (left/center/right) inside another div?
I want to have 3 divs aligned inside a container div, something like this:
18 Answers
...
jQuery Set Cursor Position in Text Area
...n you can use setCaretToPos like this:
setCaretToPos(document.getElementById("YOURINPUT"), 4);
Live example with both a textarea and an input, showing use from jQuery:
function setSelectionRange(input, selectionStart, selectionEnd) {
if (input.setSelectionRange) {
input.focus();
...
Android layout replacing a view with another view on run time
...
You could replace any view at any time.
int optionId = someExpression ? R.layout.option1 : R.layout.option2;
View C = findViewById(R.id.C);
ViewGroup parent = (ViewGroup) C.getParent();
int index = parent.indexOfChild(C);
parent.removeView(C);
C = getLayoutInflater().inflat...