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Bare asterisk in function arguments?
...a + b
...
>>> f(1, 2)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: f() takes 1 positional argument but 2 were given
>>> f(1, b=2)
3
Pragmatically, it means you have to call the function with a keyword argument. It's usually done ...
How to remove local (untracked) files from the current Git working tree
...om the working tree
Synopsis
git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <path>…
Description
Cleans the working tree by recursively removing files that are not under version control, starting from the current directory.
Normally, only files...
How do I get the information from a meta tag with JavaScript?
...const metas = document.getElementsByTagName('meta');
for (let i = 0; i < metas.length; i++) {
if (metas[i].getAttribute('name') === metaName) {
return metas[i].getAttribute('content');
}
}
return '';
}
console.log(getMeta('video'));
...
PHP array: count or sizeof?
...pers reading your code to say "sizeof(), what is that?" and having to consult the documentation.
I think it means sizeof() does not work like it does in C (calculating the size of a datatype). It probably made this mention explicitly because PHP is written in C, and provides a lot of identically na...
Android studio - Failed to find target android-18
...ndroid {
compileSdkVersion 17
buildToolsVersion "17.0.0"
defaultConfig {
minSdkVersion 10
targetSdkVersion 18
}
}
dependencies {
compile 'com.android.support:support-v4:13.0.+'
}
share
...
When correctly use Task.Run and when just async-await
...rmal way to implement a "core" async method is to use TaskCompletionSource<T> or one of its shorthand notations such as FromAsync. I have a blog post that goes into more detail why async methods don't require threads.
– Stephen Cleary
Nov 14 '15 at 21:08
...
How to remove all event handlers from an event
... delegates being added/subtracted to
it.
Take the following:
List<EventHandler> delegates = new List<EventHandler>();
private event EventHandler MyRealEvent;
public event EventHandler MyEvent
{
add
{
MyRealEvent += value;
delegates.Add(value);
}
...
How to set OnClickListener on a RadioButton in Android?
... listener from XML layout: android:onClick="onRadioButtonClicked" in your <RadioButton/> tag.
<RadioButton android:id="@+id/radio_pirates"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pirates"
android:onClick="onRadioButtonC...
A monad is just a monoid in the category of endofunctors, what's the problem?
.... However, it does not articulate how, in the context of this statement, (<*>) could also have also been chosen. It truly is a an example of six/half dozen. The logic for combining values are exactly alike; same input generates the same output from each (unlike the Sum and Product monoids for ...
How to output numbers with leading zeros in JavaScript [duplicate]
...his...
function pad(num, size) {
var s = num+"";
while (s.length < size) s = "0" + s;
return s;
}
Or if you know you'd never be using more than X number of zeros this might be better. This assumes you'd never want more than 10 digits.
function pad(num, size) {
var s = "0000000...