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Python: print a generator expression?
...eally any difference, the parenthesis are only there to make the syntax valid. You do not need them if you are passing it in as the only parameter to a function for example:
>>> sorted(x*x for x in range(10))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
Basically all the other comprehensions ava...
Subset of rows containing NA (missing) values in a chosen column of a data frame
...NULL" strings as is).
If using read.table() or read.csv(), you should consider the "na.strings" argument to do clean data import, and always work with real R NA values.
An example, working in both cases "NULL" and "NA" cells :
DF <- read.csv("file.csv", na.strings=c("NA", "NULL"))
new_DF <-...
If vs. Switch Speed
...after 5-6 elements it'll generate a jump table.
– antiduh
Feb 27 at 6:31
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What exactly does stringstream do?
...perator>> could be used.
Also in this example the string buffer is hidden and not used explicitly. But it would be too long of a post to write about every possible aspect and use-case.
Note: I probably stole it from someone on SO and refined, but I don't have original author noted.
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brew update: The following untracked working tree files would be overwritten by merge:
...months. Quite annoying, it's handy that SO has a favourite feature (that said googling the error brings this post up as first result usually)
– totallyNotLizards
Jan 10 '14 at 14:59
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Rotating a point about another point (2D)
...values of angle will perform right-ward (clockwise) rotation, and that providing a negative value would perform it left-ward (anti-clockwise)? Or is anti-clockwise a more complicated operation (i.e. calculating the inverse angle and then rotating clockwise by that amount)? I've seen a ton of pages g...
Track a new remote branch created on GitHub
...and setup a tracking branch. Just wanted to reiterate what @Mark Longair said above in this comment: stackoverflow.com/questions/11262703/….
– Ryan Walls
Jan 23 '14 at 15:39
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Django's SuspiciousOperation Invalid HTTP_HOST header
... I found a lot of people are trying to get access to my website using invalid host. Not only using IP address. I think this may be some people trying to find a website which cannot defend a csrf attack.
– ramwin
Jan 19 '18 at 10:28
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Troubleshooting “The use statement with non-compound name … has no effect”
...ould do:
use Blog\Article as BA;
... to shorten it, but you cannot get rid of it entirely.
Consequently, use Blog is useless, but I believe you could write:
use \ReallyLongNSName as RLNN;
Note that you must use a leading \ here to force the parser into knowing that ReallyLongNSName is fully...
How to click first link in list of items after upgrading to Capybara 2.0?
...").click
Capybara finds several .item's so it raises an exception. I consider this behavior of Capybara 2 very good.
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