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Applying a function to every row of a table using dplyr?
... the intersection of purrr and dplyr. They have been removed from purrr in order to make the package lighter and because they have been replaced by other solutions in the tidyverse.
So, you will need to install + load that package to make the code below work.
Original post
Hadley frequently chan...
When to use ko.utils.unwrapObservable?
...that checks permissions, or determines what to do based on something else, etc). What I really needed was to unwrap any function, even if it's not an observable.
The following recursively unwraps EVERYTHING:
ko.utils.unwrapFunction = function (func) {
if (typeof func != 'function') {
r...
How to access custom attributes from event object in React?
...o handy things like that. We no longer need to attach data to DOM nodes in order to keep track of them.
IMO this is much cleaner than relying on DOM events.
Update April 2017: These days I would write onClick={() => this.removeTag(i)} instead of .bind
...
How to open every file in a folder?
...rent directory using os.listdir:
import os
for filename in os.listdir(os.getcwd()):
with open(os.path.join(os.cwd(), filename), 'r') as f: # open in readonly mode
# do your stuff
Glob
Or you can list only some files, depending on the file pattern using the glob module:
import glob
for ...
How does collections.defaultdict work?
...interesting when the values in a dictionary are collections (lists, dicts, etc.) In this case, the value (an empty list or dict) must be initialized the first time a given key is used. While this is relatively easy to do manually, the defaultdict type automates and simplifies these kinds of operatio...
How to disable the application pool idle time-out in IIS7?
...any setting on a high traffic site you should always test for side effects etc on your staging/QA environment. Also during the time you're applying the change to your production environment then you really ought to throw up a maintenance page for public facing users until such time the change has ta...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...hing you said is incorrect, about the ints, heap, history, global statics, etc. 0.ReferenceEquals(0) will fail because you are trying to call a method on a compile time constant. there is no object to hang it off. An unboxed int is a struct, stored on the stack. Even int i = 0; i.ReferenceEquals...
Convert bytes to a string
... Granted there could be some variation depending on input, Python version, etc. Doesn't seem too slow to me.
– leetNightshade
Sep 1 '14 at 17:06
5
...
python setup.py uninstall
...aging tool/version are you using for this to work? (distutils, distribute, etc...)
– Ciro Santilli 郝海东冠状病六四事件法轮功
May 4 '13 at 14:21
1
...
How to make an ImageView with rounded corners?
...nt.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
...