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How do you check in python whether a string contains only numbers?
... I had no idea that method existed. I've always done try: assert str(int(foo)) == foo; except (AssertionError,ValueError): #handle and it felt ugly as sin. Thanks!
– Adam Smith
Jan 27 '14 at 18:23
...
jQuery get value of select onChange
...ith script you need to pass a reference to the current element:
onselect="foo(this);"
and then:
function foo(element) {
// $(element).val() will give you what you are looking for
}
share
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What is an example of the simplest possible Socket.io example?
...id sent from the server
socket.emit('i am client', {data: 'foo!', id: data.id});
});
socket.on('time', function(data) {
addMessage(data.time);
});
socket.on('error', console.error.bind(console));
socket.on('m...
Why does cURL return error “(23) Failed writing body”?
...ious program is finished writing the whole page.
In curl "url" | grep -qs foo, as soon as grep has what it wants it will close the read stream from curl. cURL doesn't expect this and emits the "Failed writing body" error.
A workaround is to pipe the stream through an intermediary program that alwa...
What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
...last digit in the used gem can be "greater than" the given version. E.g., foo ~> a.b.c.d means any version of foo is fine as long as it's still a.b.c.{something} where {something} >= d. See also related question
– michael
Feb 10 '13 at 0:32
...
How can I print variable and string on same line in Python?
...print statement separates the items by a single space:
>>> print "foo","bar","spam"
foo bar spam
or better use string formatting:
print "If there was a birth every 7 seconds, there would be: {} births".format(births)
String formatting is much more powerful and allows you to do some other ...
Is there a performance difference between i++ and ++i in C?
...uld indeed be slower since with ++it you can just return the final value.
Foo Foo::operator++()
{
Foo oldFoo = *this; // copy existing value - could be slow
// yadda yadda, do increment
return oldFoo;
}
Another difference is that with ++i you have the option of returning a reference instead...
How to pad zeroes to a string?
...0:03d}'.format(n)) # python >= 2.6 + python 3
004
>>> print('{foo:03d}'.format(foo=n)) # python >= 2.6 + python 3
004
>>> print('{:03d}'.format(n)) # python >= 2.7 + python3
004
String formatting documentation.
...
How do I create a folder in a GitHub repository?
... store empty folders. Just make sure there's a file in the folder like doc/foo.txt and run git add doc or git add doc/foo.txt, and the folder will be added to your local repository once you've committed (and appear on GitHub once you've pushed it).
...
Does return stop a loop?
...inally always executes and can "override" the return in the try.
function foo() {
try {
for (var i = 0; i < 10; i++) {
if (i % 3 == 0) {
return i; // This executes once
}
}
} finally {
return 42; // But this still executes
...