大约有 40,000 项符合查询结果（耗时：0.0374秒） [XML]
Replacing blank values (white space) with NaN in pandas
...', 4],
[-1.176781, 'qux', ' '],
], columns='A B C'.split(), index=pd.date_range('2000-01-01','2000-01-06'))
# replace field that's entirely space (or empty) with NaN
print(df.replace(r'^\s*$', np.nan, regex=True))
Produces:
A B C
2000-01-01 -0.532681 foo ...
Change the default editor for files opened in the terminal? (e.g. set it to TextEdit/Coda/Textmate)
...e git works the way I would expect it to. This git config --global --unset-all core.editor then git config --global --add core.editor "open -W -n".
– Diogenes
Jul 4 '11 at 20:27
...
In Windows cmd, how do I prompt for user input and use the result in another command?
...o accept user input and then use the results of that input as part of the call to additional commands.
12 Answers
...
Reverting to a specific commit based on commit id with Git? [duplicate]
... @prosseek the default is actually mixed. --mixed Resets the index but not the working tree (i.e., the changed files are preserved but not marked for commit) and reports what has not been updated. This is the default action. See kernel.org/pub/software/scm/git/docs/git-reset.html
...
How to position text over an image in css
...s: http://jsfiddle.net/EgLKV/3/
Its done by using position:absolute and z-index to place the text over the image.
#container {
height: 400px;
width: 400px;
position: relative;
}
#image {
position: absolute;
left: 0;
top: 0;
}
#text {
z-index: 100;
position: absolute...
Passing an array as a function parameter in JavaScript
I'd like to call a function using an array as parameters:
10 Answers
10
...
Cannot set content-type to 'application/json' in jQuery.ajax
...S header is used to find out if the request from the originating domain is allowed. Using fiddler, I added the following to the response headers from my server.
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: Content-Type
Access-Control-Allow-Methods: POST, GET, OPTIONS
Once the b...
How to delete a row by reference in data.table?
.... 'keep.idxs'
keep.idxs <- setdiff(DT[, .I], del.idxs); # select row indexes to keep
cols = names(DT);
DT.subset <- data.table(DT[[1]][keep.idxs]); # this is the subsetted table
setnames(DT.subset, cols[1]);
for (col in cols[2:length(cols)]) {
DT.subset[, (col) := DT[[col]][keep...
Automatically deleting related rows in Laravel (Eloquent ORM)
...();
static::deleting(function($user) { // before delete() method call this
$user->photos()->delete();
// do the rest of the cleanup...
});
}
}
You should probably also put the whole thing inside a transaction, to ensure the referential integrity...
Sublime Text 3, convert spaces to tabs
...
yes, I know. My desire is to make this automatically ... any idea?
– chris
Mar 20 '14 at 14:02
2
...