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Boolean operators && and ||
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The shorter ones are vectorized, meaning they can return a vector, like this:
((-2:2) >= 0) & ((-2:2) <= 0)
# [1] FALSE FALSE TRUE FALSE FALSE
The longer form evaluates left to right examining only the first element of each...
Remove all the elements that occur in one list from another
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One way is to use sets:
>>> set([1,2,6,8]) - set([2,3,5,8])
set([1, 6])
Note, however, that sets do not preserve the order of elements, and cause any duplicated elements to be removed. The elements also need to be h...
What are the benefits of learning Vim? [closed]
...g
vi is guaranteed to exist on all Unix systems and exists on most Linux ones as well. That kind of broad coverage makes learning it worth it.
It's much quicker to use vi for a sudo edit:
$ sudo vi
Also, GMail uses vi-ish commands for selecting & moving emails around!
You don't have to be...
Is there a way to use two CSS3 box shadows on one element?
... Also mention that the first declared shadow is on to of the following one(s) jsfiddle.net/webtiki/s9pkj
– web-tiki
Jul 14 '14 at 14:20
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Import multiple csv files into pandas and concatenate into one DataFrame
...d several csv files from a directory into pandas and concatenate them into one big DataFrame. I have not been able to figure it out though. Here is what I have so far:
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I want to remove double quotes from a String
...double quotes. you can replace this with " to only match double quotes.
+: one or more quotes, chars, as defined by the preceding char-class (optional)
g: the global flag. This tells JS to apply the regex to the entire string. If you omit this, you'll only replace a single char.
If you're trying t...
What's the best way to iterate over two or more containers simultaneously
...tage of your indices implementation in comparison to boost counting_range? One could simply use boost::counting_range(size_t(0), containerA.size())
– SebastianK
Nov 6 '14 at 13:11
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Convert JSON String to Pretty Print JSON output using Jackson
... it should be possible to configure it to use indentation. Although to be honest, I am not sure why you even need to indent it for response.
– StaxMan
Jan 26 '13 at 3:57
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Delete a single record from Entity Framework?
...have a list of IDs from some other query or source, and you need to delete one. Rather than loading up the objects just to delete them, this way you can delete by ID. You know, that's how the DELETE statement works in SQL normally.
– siride
Jul 11 '16 at 18:18
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Why is no one using make for Java?
...and sum up all of the files that are out of date, and then compile them in one go. Make will simply call the java compiler on each individual file. Having make NOT do this requires enough external tooling to really show that Make is not quite up to the task.
That's why alternatives like Ant and Mav...