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Bomb dropping algorithm
...o 0. One can proceed down the line left to right in a strategy like this:
index = 1
while index < line_length
while number_at_index(index - 1) > 0
bomb(index)
end
index++
end
# take care of the end of the line
while number_at_index(index - 1) > 0
bomb(index - 1)
end
A couple ...
SQL SELECT WHERE field contains words
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+ 1 I agree it's slower but it can be mitigated with good indexing
– Preet Sangha
Jan 12 '13 at 6:22
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combinations between two lists?
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Note: This answer is for the specific question asked above. If you are here from Google and just looking for a way to get a Cartesian product in Python, itertools.product or a simple list comprehension may be what you are looking for - see the other answers.
S...
AWS S3: The bucket you are attempting to access must be addressed using the specified endpoint
...s must be addressed using the specified endpoint. Please send all future requests to this endpoint."
US Standard is us-east-1
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Parameterize an SQL IN clause
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Two caveats:
The performance is terrible. LIKE "%...%" queries are not indexed.
Make sure you don't have any |, blank, or null tags or this won't work
There are other ways to accomplish this that some people may consider cleaner, so please keep reading.
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Git - Difference Between 'assume-unchanged' and 'skip-worktree'
...it, git (of course) assumes the files corresponding to that portion of the index have not been modified in the working copy. So it avoids a mess of stat calls. This bit is lost whenever the file's entry in the index changes (so, when the file is changed upstream).
skip-worktree is more than that: e...
The tilde operator in Python
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One should note that in the case of array indexing, array[~i] amounts to reversed_array[i]. It can be seen as indexing starting from the end of the array:
[0, 1, 2, 3, 4, 5, 6, 7, 8]
^ ^
i ~i
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Delete the first three rows of a dataframe in pandas
...to do this in a groupby()? This works but returns duplicate columns in the index df=pd.DataFrame({'v':np.arange(10).tolist()*2,'g':['a']*10+['b']*10});df.groupby('g').apply(lambda x: x.iloc[3:])
– citynorman
Aug 6 '17 at 22:24
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AngularJS: How to clear query parameters in the URL?
... tell LinkedIn to redirect the user back to my webapp and include a "code" query param in the URL. It's a traditional Oauth 2.0 flow.
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Exception 'open failed: EACCES (Permission denied)' on Android
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For API 23+ you need to request the read/write permissions even if they are already in your manifest.
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permi...