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Functions that return a function
...can return a true/false value. An integer (1,2,3,4...). You can return a string. You can return a complex object with multiple properties. And you can return a function. a function is just a thing.
In your case, returning b returns the thing, the thing is a callable function. Returning b() re...
How do I remove background-image in css?
...neral rule which gives all DIVs a background image.
I have one div (with id='a') which I don't want it to have the background image.
What css rule do I have to give it?
...
How can I force division to be floating point? Division keeps rounding down to 0?
... b might be something other than an integer or floating-point number (or a string representing one). If you might be dealing with other types (such as complex numbers) you'll need to either check for those or use a different method.
...
Python append() vs. + operator on lists, why do these give different results?
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if an element is single string, e.g. s = 'word', l = ['this', 'is']. Then l.append(s) and l+s should be the same. Am I correct?
– user3512680
Feb 2 at 22:13
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Testing modules in rspec
...dummy_class = DummyClass.new
@dummy_class.extend(Say)
end
it "get hello string" do
expect(@dummy_class.hello).to eq "hello"
end
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How to have Android Service communicate with Activity
...FRESH_DATA_INTENT));
(RefreshTask.REFRESH_DATA_INTENT is just a constant string.)
In my listening activity, I define my BroadcastReceiver:
private class DataUpdateReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.g...
Search and replace in bash using regular expressions
...is available, with the same precedence as == and !=. When it is used, the string to the right of the operator is considered an extended regular expression and matched accordingly (as in regex(3)).
– nickl-
Mar 10 '14 at 4:22
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How to stop mysqld
...
Thanks, /usr/local/mysql/bin/mysqladmin -u root shutdown did the trick.
– David542
Jun 18 '12 at 22:03
5
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jQuery 1.9 .live() is not a function
...lier, you will notice things breaking if you do not follow the migration guide below. You must not simply replace .live() with .on()!
Read before you start doing a search and replace:
For quick/hot fixes on a live site, do not just replace the keyword live with on, as the parameters are differen...
How do you test that a Python function throws an exception?
... out = a*a
except TypeError:
raise TypeError("Input should be a string:")
return out
Here is the test to be performed (only this test is inserted):
import dum_function as df # import function module
import unittest
class Test(unittest.TestCase):
"""
The class inherits from...