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Create an empty data.frame
... Nice solution, however I found that I get a data frame with 0 rows. In order to keep the size of the data frame the same, I suggest new_df = df[NA,]. This also allows to store any previous column into the new data frame. For example to obtain the "Date" column from original df (while keeping res...
Python way of printing: with 'format' or percent form? [duplicate]
...types. The
use of a binary operator means that care may be needed in order to
format tuples and dictionaries correctly. As the new
:ref:string-formatting syntax is more flexible and handles tuples and
dictionaries naturally, it is recommended for new code. However, there
...
Launching Google Maps Directions via an intent on Android
...sk for directions.
If you use the query parameter "geo:lat,lon?q=name" in order to label your geopoint, it uses the query for search and dismiss the lat/lon parameters.
I found a way to center the map with lat/lon and display a pin with a custom label, very nice to display and useful when asking f...
Best way to detect when a user leaves a web page?
...ution - since in most browsers the navigation controls (the nav bar, tabs, etc.) are located above the page content area, you can detect the mouse pointer leaving the page via the top and display a "before you leave" dialog. It's completely unobtrusive and it allows you to interact with the user bef...
How can I wait for set of asynchronous callback functions?
...
@philx_x - Thought so. You need a polyfill library in order to use fetch nowadays. Takes a little air out of your comment about avoiding an ajax library. Fetch is nice, but it's years away from being able to use it without a polyfill. It's not even in the latest version of al...
Detect permission of camera in iOS
...default:
completion?(.unknown)
}
}
}
And then in order to use it you do
AVCaptureDevice.authorizeVideo(completion: { (status) in
//Your work here
})
share
|
improve th...
Parse JSON in JavaScript? [duplicate]
...er, such as IE 7 (2006), IE 6 (2001), Firefox 3 (2008), Safari 3.x (2009), etc. Alternatively, you may be in an esoteric JavaScript environment that doesn't include the standard APIs. In these cases, use json2.js, the reference implementation of JSON written by Douglas Crockford, the inventor of JSO...
sed error: “invalid reference \1 on `s' command's RHS”
...
Nevermind my mistake was to use -ire instead of use -ri. Order matters :-)
– m3nda
Jun 10 '18 at 15:22
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How to compare versions in Ruby?
...lass_eval {include Comparable} will make all arrays respond to <, >, etc. Or, if you just want to do this to certain arrays: a = [1, 2]; a.extend(Comparable)
– Wayne Conrad
Jan 12 '10 at 19:28
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How to replace all occurrences of a string?
...)|[\]\\]/g, '\\$&'); // $& means the whole matched string
}
So in order to make the replaceAll() function above safer, it could be modified to the following if you also include escapeRegExp:
function replaceAll(str, find, replace) {
return str.replace(new RegExp(escapeRegExp(find), 'g'), ...