大约有 6,261 项符合查询结果（耗时：0.0162秒） [XML]
0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
... the same machine!
#include <iostream>
#include <cmath>
void foo(double x, double y)
{
if (std::cos(x) != std::cos(y)) {
std::cout << "Huh?!?\n"; //← you might end up here when x == y!!
}
}
int main()
{
foo(1.0, 1.0);
return 0;
}
See Why is cos(x) != cos(y) even...
AngularJs $http.post() does not send data
...ts data using
Content-Type: x-www-form-urlencoded
and the familiar foo=bar&baz=moe serialization.
AngularJS, however, transmits data using
Content-Type: application/json
and { "foo": "bar", "baz": "moe" }
JSON serialization, which unfortunately some Web server language...
Project structure for Google App Engine
...port *
application = webapp.WSGIApplication([
('/', IndexHandler),
('/foo', FooHandler)
], debug=True)
def main():
wsgiref.handlers.CGIHandler().run(application)
myapp/views.py
import os
import datetime
import logging
import time
from google.appengine.api import urlfetch
from google.appe...
Java: How to get input from System.console()
...);
}
}
Run this just with java:
> javac Test.java
> java Test
Foo <---- entered by the user
I saw this line: Foo <---- program output
Another option is to use System.in, which you may want to wrap in a BufferedReader to read lines, or use Scanner (again wrapping System.in).
...
Setting Environment Variables for Node to retrieve
..., the magic happens when you run the application.
USER_ID=239482 USER_KEY=foobar node app.js
That will pass the user id 239482 and the user key as foobar. This is suitable for testing, however for production, you will probably be configuring some bash scripts to export variables.
...
Removing event listener which was added with bind
...ry has the concept of namespaced events, which allow you to bind to "click.foo"; when you want to remove the event you can tell jQuery "remove all foo events" without having to know the specific handler or removing other handlers.)
...
Stop setInterval call in JavaScript
...ching the setInterval handle to its associated element (when relevant): $('foo').data('interval', setInterval(fn, 100)); and then clearing it with clearInterval($('foo').data('interval')); I'm sure there is a non-jQuery way to do it, too.
– Michael
Feb 24 '17 a...
How to split a string into a list?
...punctuation.
Example:
>>> import nltk
>>> s = "The fox's foot grazed the sleeping dog, waking it."
>>> words = nltk.word_tokenize(s)
>>> words
['The', 'fox', "'s", 'foot', 'grazed', 'the', 'sleeping', 'dog', ',',
'waking', 'it', '.']
This allows you to filter ou...
Stripping everything but alphanumeric chars from a string in Python
...mtimeit -s"d=''.join(c for c in map(chr,range(256)) if not c.isalnum());s='foo-'*25" "s.translate(None,d)"
1000000 loops, best of 3: 1.97 usec per loop
C:\junk>\python26\python -mtimeit -s"import re;s='foo-'*25;r=re.compile(r'[\W_]+')" "r.sub('',s)"
10000 loops, best of 3: 26.4 usec per loop
...
Get escaped URL parameter
...
With name = 'bar', I think this regexp would match 'foobar=10' and return '10'. Maybe you could add '[?|&]' at the beginning of your regexp. Cheers!
– Sébastien RoccaSerra
Apr 27 '11 at 10:07
...