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How do you create nested dict in Python?
... using defaultdict):
a_file = "path/to/a.csv"
b_file = "path/to/b.csv"
# read from file a.csv
with open(a_file) as f:
# skip headers
f.next()
# get first colum as keys
keys = (line.split(',')[0] for line in f)
# create empty dictionary:
d = {}
# read from file b.csv
with open(b_...
Setting Short Value Java
...spectively. Note it is common practice to use uppercase letters for better readability.
The Java Language Specification does not provide the same syntactic sugar for byte or short types. Instead, you may declare it as such using explicit casting:
byte foo = (byte)0;
short bar = (short)0;
In your...
Add days to JavaScript Date
...
@bzlm: Yes, I believe the note should read "this approach fails if the 'from' date is not in the same year or month as the current date". I still worry that users will glance over the answer and not read the warning since it doesn't stand out. Thanks.
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What does the LayoutInflater attachToRoot parameter mean?
...on()
.add(parent, childFragment)
.commit();
Since you have already added the child fragment in onCreateView() by mistake. Calling add will tell you that child view is already added to parent Hence IllegalStateException.
Here you are not responsible for adding childView, FragmentManager...
When should I use the Visitor Design Pattern? [closed]
...he visitor pattern in blogs but I've got to admit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it.
...
How to capture stdout output from a Python function call?
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Is this thread-safe? What happens if some other thread/call uses print() while do_something runs?
– Derorrist
Nov 17 '15 at 9:42
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Rails has_and_belongs_to_many migration
...You don't need it that way, it really depends on your queries. The indexes read left to right so the first one will be fastest if you are searching on restaurant_id. The second will help if you are searching on user_id. If you are searching on both, I would think the database would be smart enough t...
Debug.Assert vs Exception Throwing
I've read plenty of articles (and a couple of other similar questions that were posted on StackOverflow) about how and when to use assertions, and I understood them well. But still, I don't understand what kind of motivation should drive me to use Debug.Assert instead of throwing a plain excep...
scala vs java, performance and memory? [closed]
...he "hip language of the month" club? Nice comments. I particularly enjoyed reading the last paragraph.
– stepanian
Apr 9 '12 at 23:31
21
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How do I view all commits for a specific day?
I've already looked at the relevant docs from git-scm.com and gitref.org , but I can't seem to figure this out.
5 Answe...