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Why does ~True result in -2?
... "customized" versions of the integers 1 and 0 that only print themselves differently. They are subclasses of the integer type int.
So they behave exactly as 1 and 0, except that bool redefines str and repr to display them differently.
>>> type(True)
<class 'bool'>
>>> isin...
What's the difference between a POST and a PUT HTTP REQUEST?
...seem to be sending data to the server inside the body, so what makes them different?
17 Answers
...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
..._SECRET',
OAUTH_SIG_METHOD_HMACSHA1,
OAUTH_AUTH_TYPE_FORM
);
if (empty($_GET['oauth_verifier'])) {
$callback_url = "http://{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";
$request_token = $oauth->getRequestToken($request_token_url, $callback_url);
$_SESSION['oauth...
Iterating each character in a string using Python
...open(filename) as f:
for line in f:
# do something with line
If that seems like magic, well it kinda is, but the idea behind it is really simple.
There's a simple iterator protocol that can be applied to any kind of object to make the for loop work on it.
Simply implement an iterat...
how to convert binary string to decimal?
...t function converts strings to numbers, and it takes a second argument specifying the base in which the string representation is:
var digit = parseInt(binary, 2);
See it in action.
share
|
improv...
Java switch statement: Constant expression required, but it IS constant
...he sense required by the JLS; see §15.28 Constant Expressions for the specification of a constant expression1. This refers to §4.12.4 Final Variables which defines a "constant variable" as follows:
We call a variable, of primitive type or type String, that is final and initialized with a comp...
Are Mutexes needed in javascript?
...e the next event will be processed.
That being said, you may need a mutex if your code does something where it expects a value not to change between when the asynchronous event was fired and when the callback was called.
For example if you have a data structure where you click one button and it se...
How can I clear or empty a StringBuilder? [duplicate]
...
You can leave a little comment if you're afraid future developers won't understand
– krtek
Mar 4 '11 at 10:36
308
...
Name node is in safe mode. Not able to leave
...
Updated my answer as per new distributions, if anyone can help us out in establishing the exact version of apache hadoop since when these deprecations have come into picture, it would be great.
– Amar
Mar 19 '14 at 19:03
...
How to get a URL parameter in Express?
...d is set to " + req.params.tagId);
});
// GET /p/5
// tagId is set to 5
If you want to get a query parameter ?tagId=5, then use req.query
app.get('/p', function(req, res) {
res.send("tagId is set to " + req.query.tagId);
});
// GET /p?tagId=5
// tagId is set to 5
Express 3.x
URL paramete...