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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...ar interval and check all of the values in the data structure recursively. By comparison, setting a value on the state will signal to a listener that some state has changed, so React can simply listen for change events on the state and queue up re-rendering.
The virtual DOM is used for efficient re...
Understanding REST: Verbs, error codes, and authentication
...reate a new entry in the collection where the ID is assigned automatically by the collection. The ID created is usually included as part of the data returned by this operation.
DELETE: Meaning defined as "delete the entire collection".
When dealing with a Member URI like: http://example.com/reso...
Ignoring time zones altogether in Rails and PostgreSQL
... in PostgreSQL
Internal storage and epoch
Internally, timestamps occupy 8 bytes of storage on disk and in RAM. It is an integer value representing the count of microseconds from the Postgres epoch, 2000-01-01 00:00:00 UTC.
Postgres also has built-in knowledge of the commonly used UNIX time counting...
What is the difference between a static and a non-static initialization code block
.....
is a block of code static { ... } inside any java class. and executed by virtual machine when class is called.
No return statements are supported.
No arguments are supported.
No this or super are supported.
Hmm where can I use it?
Can be used anywhere you feel ok :) that simple. But I see mo...
Why is MATLAB so fast in matrix multiplication?
... with a Tesla C2070:
>> A = rand(1024); gA = gpuArray(A);
% warm up by executing the operations a couple of times, and then:
>> tic, C = A * A; toc
Elapsed time is 0.075396 seconds.
>> tic, gC = gA * gA; toc
Elapsed time is 0.008621 seconds.
MATLAB uses highly optimized librarie...
What makes Lisp macros so special?
...anguage. This gives a simple syntax for a common case. The line
divisibleByTwo = [x for x in range(10) if x % 2 == 0]
yields a list containing all even numbers between 0 and 9. Back in the Python 1.5 days there was no such syntax; you'd use something more like this:
divisibleByTwo = []
for x i...
Reading large text files with streams in C#
...
You can improve read speed by using a BufferedStream, like this:
using (FileStream fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (BufferedStream bs = new BufferedStream(fs))
using (StreamReader sr = new StreamReader(...
Loader lock error
I am building on C++ dll, by writing code in C#.
9 Answers
9
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Are there constants in JavaScript?
... Rhino or Node.js) you can use the const keyword. It's currently supported by all modern browsers except for IE.
– Husky
Aug 1 '11 at 19:16
17
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How to change the default encoding to UTF-8 for Apache?
...et=UTF-8
Or, if you have administrator rights, you could set it globally by editing httpd.conf and adding:
AddDefaultCharset UTF-8
(You can use AddDefaultCharset in .htaccess too, but it won’t affect Apache-generated directory listings that way.)
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