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What does it mean if a Python object is “subscriptable” or not?
...s that are "containers", meaning they contain other objects. This includes strings, lists, tuples, and dictionaries.
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Mimicking sets in JavaScript?
I'm working in JavaScript. I'd like to store a list of unique , unordered string values, with the following properties:
7 ...
What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
...
Bootstrap 3
The Bootstrap 3 grid comes in 4 tiers (or "breakpoints")...
Extra small (for smartphones .col-xs-*)
Small (for tablets .col-sm-*)
Medium (for laptops .col-md-*)
Large (for laptops/desktops .col-lg-*).
These grid sizes enable you to control grid behavior on different widths. The diffe...
How to replace spaces in file names using a bash script
... expansion mechanism to replace a pattern within a parameter with supplied string.
The relevant syntax is ${parameter/pattern/string}. See: https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html or http://wiki.bash-hackers.org/syntax/pe .
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What is the purpose of the single underscore “_” variable in Python?
...on')
_ = gettext.gettext
# ...
print(_('This is a translatable string.'))
2019 update: Added lambda. For a long time this answer only listed three use cases, but the lambda case came up often enough, as noted here, to be worth listing explicitly
2020 update: Added lint. Surprised nobody...
How to delete an SMS from the inbox in Android programmatically?
...j;
getContentResolver().delete(deleteUri, "address=? and date=?", new String[] {msg.getOriginatingAddress(), String.valueOf(msg.getTimestampMillis())});
I use the originating address and timestamp field to ensure a very high probability of deleting ONLY the message I am interested in. If I w...
Convert two lists into a dictionary
...
dict([(k, v) for k, v in zip(keys, values)])
In the first two cases, an extra layer of non-operative (thus unnecessary) computation is placed over the zip iterable, and in the case of the list comprehension, an extra list is unnecessarily created. I would expect all of them to be less performant,...
How to encode a URL in Swift [duplicate]
...
Swift 4.2
var urlString = originalString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
Swift 3.0
var address = "American Tourister, Abids Road, Bogulkunta, Hyderabad, Andhra Pradesh, India"
let escapedAddress = address.add...
Set the maximum character length of a UITextField
...tField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
// Prevent crashing undo bug – see note below.
if(range.length + range.location > textField.text.length)
{
return NO;
}
NSUInteger newLength = [textField.t...
How can I do an asc and desc sort using underscore.js?
...unction(num){
return num * -1;
}); // [3, 2, 1]
If you're sorting by strings not numbers, you can use the charCodeAt() method to get the unicode value.
//Descending Order Strings:
_.sortBy(['a', 'b', 'c'], function(s){
return s.charCodeAt() * -1;
});
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