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How to access the correct `this` inside a callback?
...ontrived example:
var arr = [1, 2, 3];
var obj = {multiplier: 42};
var new_arr = arr.map(function(v) {
return v * this.multiplier;
}, obj); // <- here we are passing `obj` as second argument
Note: Whether or not you can pass a value for this is usually mentioned in the documentation of that...
Is it possible to preview stash contents in git?
.... git stash list will show all the available.
– brita_
Jul 18 '14 at 21:13
7
If you are using Pow...
Convert Unix timestamp to a date string
...standard Perl solution is:
echo $TIMESTAMP | perl -nE 'say scalar gmtime $_'
(or localtime, if preferred)
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Pandas: drop a level from a multi-level column index?
...
You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
>>> df = pd.DataFrame([[1,2], [3,4]], columns=cols)
>>> df
a
b c
0 1 2
1 3 4
[2 rows x 2 columns]
>>> df.columns = df.columns.droplevel()
>>>...
Configuring diff tool with .gitconfig
....gitconfig:
[diff]
tool = diffmerge
[difftool "diffmerge"]
cmd = /Applications/Diffmerge.app/Contents/MacOS/diffmerge $LOCAL $REMOTE
This will fix the diff tool. You can also fix this without editing the ~/.gitconfig directly by entering these commands from the terminal:
git config --glo...
@ variables in Ruby on Rails
...
Does your class have an attr_accessor defined with the same name @DanDevine? attr_accessor is syntactic sugar that generates a getter\setter for you. If you are getting the value without the @ symbol the code receives the variable because it's calling t...
How can I create a UILabel with strikethrough text?
...for strikethrough Enable/Disable.
extension UILabel {
func strikeThrough(_ isStrikeThrough:Bool) {
if isStrikeThrough {
if let lblText = self.text {
let attributeString = NSMutableAttributedString(string: lblText)
attributeString.addAttribute(NSAttributedString...
Multiline TextView in Android?
... android:id="@+id/address1"
android:gravity="left"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:maxLines="4"
android:lines="4"
android:text="Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labo...
Are PHP functions case sensitive?
I was digging through some code, and I found some calls to mySQL_fetch_array . Is PHP case sensitive about function names? I recall reading this somewhere but can't seem to find any reference to it.
...
How does tuple comparison work in Python?
...
@CMCDragonkai -- yes. try: x = tuple([0 for _ in range(n)]) and do the same for y. Setting n=100, 1000, 10,000, and 100,000 and running %timeit x==y gave timing values of .5, 4.6, 43.9, and 443 microseconds respectively, which is about as close to O(n) as you can pra...