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Send POST data using XMLHttpRequest
...s on how to do this.
var http = new XMLHttpRequest();
var url = 'get_data.php';
var params = 'orem=ipsum&name=binny';
http.open('POST', url, true);
//Send the proper header information along with the request
http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
http.onre...
What are free monads?
...r monad, and the second one gives you a way to "get out" of it.
More generally, if X is a Y with some extra stuff P, then a "free X" is a a way of getting from a Y to an X without gaining anything extra.
Examples: a monoid (X) is a set (Y) with extra structure (P) that basically says it has an ope...
Make a div fill up the remaining width
...tage is that now you can specify a max-width and a min-width to your left & right elements. Which is fantastic for fluid layouts.. hence responsive layout :-)
note 1: versus Leigh's answer where you need to add the margin-left & margin-right properties to the "content__middle" class.
Co...
What does `:_*` (colon underscore star) do in Scala?
...tes: MetaData, scope: NamespaceBinding,
child: Node*)
which is called as
new Elem(prefix, label, attributes, scope,
child1, child2, ... childN)
but here there is only a sequence, not child1, child2, etc. so this allows the result sequence to be used as the input to the constru...
Why can't Python parse this JSON data?
... You have [] when you should have {}:
[] are for JSON arrays, which are called list in Python
{} are for JSON objects, which are called dict in Python
Here's how your JSON file should look:
{
"maps": [
{
"id": "blabla",
"iscategorical": "0"
},
...
Calculate size of Object in Java [duplicate]
...ad associated with the object.
The answer that Sergey linked has a great example, which I'll repost here, but you should have already looked at from his comment:
import java.lang.instrument.Instrumentation;
public class ObjectSizeFetcher {
private static Instrumentation instrumentation;
pu...
Effects of changing Django's SECRET_KEY
...rotect against forged POST requests
form security
protect against message tampering as the message framework may use cookies to pass messages between views.
protect session data and create random session keys to avoid tampering as well.
create random salt for most password hashers
create random pass...
Linux 进程卡住了怎么办？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...的信号，这也是无法用 kill 杀掉它的原因。
在 Stack Overflow 有一个解答：
kill -9 只是给进程发送了一个 SIGKILL 信号，当一个进程处于特殊状态时（信号处理，或者系统调用中）会无法处理任何信号，包括 SIGKILL 也不能被正确...
Is it possible to GROUP BY multiple columns using MySQL?
...garding SUM using with GROUP BY. If GROUP BY only by one column, then SUMs all values of each distinct (different) the column value sqlfiddle.com/#!9/1cbde2/2. If GROUP BY two columns. Then mysql at first checks if for the first column value there are different values in the second column. If yes, t...
How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
My version of node is always v0.6.1-pre even after I install brew node and NVM install v0.6.19.
28 Answers
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