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What are the differences between Rust's `String` and `str`?
...handle it behind a pointer. This means that str most commonly2 appears as &str: a reference to some UTF-8 data, normally called a "string slice" or just a "slice". A slice is just a view onto some data, and that data can be anywhere, e.g.
In static storage: a string literal "foo" is a &'sta...
Is C++ context-free or context-sensitive?
...hear claims that C++ is a context-sensitive language. Take the following example:
20 Answers
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Count how many records are in a CSV Python?
...aranteed to be a fixed size, so the only way to count them is to read them all.
– Martijn Pieters♦
Apr 19 '13 at 15:55
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Creating default object from empty value in PHP?
I see this error only after upgrading my PHP environment to PHP 5.4 and beyond. The error points to this line of code:
16 A...
How to handle multiple cookies with the same name?
...t the Cookie with longer path are before the one with shorter path. And in PHP (tested on version 7) it only read the first cookie which is set to the $_COOKIE variable.
– Alexander Schranz
Feb 12 '18 at 18:56
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Is there a “null coalescing” operator in JavaScript?
...y" value or the last "falsey" one (if none can evaluate to true) and that && works in the opposite way: returning the last truey value or the first falsey one.
– Justin Johnson
Oct 25 '10 at 2:09
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How is Racket different from Scheme?
...lf-evaluating. Also, Racket does have the more restricted letrec -- for example, the one in the r5rs language; it's an intentional choice to use the letrec*-like version in the default language.
– Eli Barzilay
Jul 31 '10 at 15:57
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What's the difference between globals(), locals(), and vars()?
What is the difference between globals() , locals() , and vars() ? What do they return? Are updates to the results useful?
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How can I write to the console in PHP?
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Firefox
On Firefox you can use an extension called FirePHP which enables the logging and dumping of information from your PHP applications to the console. This is an addon to the awesome web development extension Firebug.
http://www.studytrails.com/blog/using-firephp-in-firefox...
How to urlencode a querystring in Python?
...ption' : 'cool event'}
>>> urllib.urlencode(f)
'eventName=myEvent&eventDescription=cool+event'
Python 3 or above
Use:
>>> urllib.parse.urlencode(f)
eventName=myEvent&eventDescription=cool+event
Note that this does not do url encoding in the commonly used sense (look a...