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How to grab substring before a specified character jQuery or JavaScript
...xtract everything before the ',' comma. How do I do this in JavaScript or jQuery? I tried this and not working..
11 Answers...
How to get arguments with flags in Bash
...arrays
declare -A arguments=();
declare -A variables=();
# declaring an index integer
declare -i index=1;
# any variables you want to use here
# on the left left side is argument label or key (entered at the command line along with it's value)
# on the right side is the variable name the value ...
How to unstage large number of files without deleting the content
...you have a pristine repo (or HEAD isn't set)[1] you could simply
rm .git/index
Of course, this will require you to re-add the files that you did want to be added.
[1] Note (as explained in the comments) this would usually only happen when the repo is brand-new ("pristine") or if no commits ha...
Why doesn't git recognize that my file has been changed, therefore git add not working
...
I had a problem where once upon a time I set the git index to 'assume unchanged' on my file.
You can tell git to stop ignoring changes to the file with:
git update-index --no-assume-unchanged path/to/file
If that doesn't help a reset may be enough for other weird cases.
...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
... 对应表达式 a <= b
__index(a, b) 对应表达式 a.b
__newindex(a, b, c) 对应表达式 a.b = c
__call(a, ...)&nb...
JavaScript “new Array(n)” and “Array.prototype.map” weirdness
... and constructs a new array from the results. callback is invoked only for indexes of the array which have assigned values; it is not invoked for indexes which have been deleted or which have never been assigned values." In this case, x's values have not explicitly assigned values, whereas y's were...
Why doesn't java.util.Set have get(int index)?
...ld someone please explain why the java.util.Set interface lacks get(int Index) , or any similar get() method?
18 Answe...
Parse email content from quoted reply
.... One, you could use the message's Message-ID, In-Reply-To ID, and Thread-Index to determine the individual message, it's parent, and the thread it belongs to. For more information on this, see RFC822, RFC2822, this interesting article on threading, or this article on threading. Once you have re-...
How can I read a function's signature including default argument values?
...c', 'has_default default_value')
def _get_default_arg(args, defaults, arg_index):
""" Method that determines if an argument has default value or not,
and if yes what is the default value for the argument
:param args: array of arguments, eg: ['first_arg', 'second_arg', 'third_arg']
...
pandas GroupBy columns with NaN (missing) values
...ell.
A less hacky solve is to use pd.drop_duplicates() to create a unique index of value combinations each with their own ID, and then group on that id. It is more verbose but does get the job done:
def safe_groupby(df, group_cols, agg_dict):
# set name of group col to unique value
group_i...