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How to get the position of a character in Python?
...;stdin>", line 1, in <module>
ValueError: substring not found
From the Python manual
string.find(s, sub[, start[, end]])
Return the lowest index in s where the substring sub is found such that sub is wholly contained in s[start:end]. Return -1 on failure. Defaults for start and en...
Getting the last element of a list
...f range" - and that's what should happen when attempting to get an element from an empty list. For Strings astr[-1:] could be a valid approach since it returns the same type as astr[-1], but I don't think the ':' helps to deal with empty lists (and the question is about lists). If the idea is to use...
Combining multiple git repositories
...
The funky filter-branch command is from git's filter-branch man pages. You should say that as: a) it should be attributed correctly b) I won't run such a command just because someone, even with high reputation, posted it on StackOverflow. Knowing it's from man...
Why doesn't Haskell's Prelude.read return a Maybe?
... good news is that folks were sufficiently convinced to start moving away from fail in the libraries. The bad news is that the proposal got lost in the shuffle. There should be such a function, although one is easy to write (and there are zillions of very similar versions floating around many codeb...
Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...stored in read-only memory when the program is run. This is to prevent you from accidentally changing a string constant. In your first example, "string" is stored in read-only memory and *str points to the first character. The segfault happens when you try to change the first character to 'z'.
In t...
Resolve Git merge conflicts in favor of their changes during a pull
...ull --rebase, ours and theirs may appear swapped; --ours gives the version from the branch the changes are rebased onto, while --theirs gives the version from the branch that holds your work that is being rebased.
– Vuk Djapic
Jul 6 '17 at 15:13
...
Linear Regression and group by in R
...The random effects indicate how the trend for each individual state differ from the global trend. The correlation structure takes the temporal autocorrelation into account. Have a look at Pinheiro & Bates (Mixed Effects Models in S and S-Plus).
library(nlme)
lme(response ~ year, random = ~year|...
Using ls to list directories and their total sizes
...
To list the largest directories from the current directory in human readable format:
du -sh * | sort -hr
A better way to restrict number of rows can be
du -sh * | sort -hr | head -n10
Where you can increase the suffix of -n flag to restrict the numb...
jsonify a SQLAlchemy result set in Flask [duplicate]
...at this question. It shows how to discover columns programmatically. So, from that I created the code below. It works for me, and I'll be using it in my web app. Happy coding!
def to_json(inst, cls):
"""
Jsonify the sql alchemy query result.
"""
convert = dict()
# add your ...
Javascript shorthand ternary operator
...d ambiguity, I have replaced my original detailed explanation with the one from Mozilla Developer Network. It should be less ambiguous.
– Tadeck
Jan 16 '12 at 18:00
add a comm...