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O(nlogn) Algorithm - Find three evenly spaced ones within binary string
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Finally! Following up leads in sdcvvc's answer, we have it: the O(n log n) algorithm for the problem! It is simple too, after you understand it. Those who guessed FFT were right.
The problem: we are given a binary string S of l...
Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?
...associated with any alphabet.
The ECMAScript standard, chapter 7.6 (which all the browsers except Internet Explorer are following), states that an identifier must start with one of the following.
a Unicode letter
$ or _
\ followed by a unicode escape sequence.
The following characters of an ide...
What is digest authentication?
...es with the username, realm, password and the URI request. The client runs all of those fields through an MD5 hashing method to produce a hash key.
It sends this hash key to the server along with the username and the realm to attempt to authenticate.
Server-side the same method is used to generate...
How can I pad an int with leading zeros when using cout
...ormatted output to a string (char* or char[]) not to console directly. Actually I am writing a function that returns formatted string
– shashwat
Dec 23 '12 at 9:32
14
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Performance optimization strategies of last resort [closed]
...erformance questions on this site already, but it occurs to me that almost all are very problem-specific and fairly narrow. And almost all repeat the advice to avoid premature optimization.
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Does ARC support dispatch queues?
...d as
* Objective-C types when building with an Objective-C compiler. This allows
* them to participate in ARC, in RR management by the Blocks runtime and in
* leaks checking by the static analyzer, and enables them to be added to Cocoa
* collections.
*
* NOTE: this requires explicit cancellati...
GitHub relative link in Markdown file
...entation files, whether you view the documentation on GitHub itself, or locally, using a different markup renderer.
You want examples of link definitions and how they work? Here's some Markdown for you.
Instead of an absolute link:
[a link](https://github.com/user/repo/blob/branch/other_file...
How to get key names from JSON using jq
...fy -r then you get a quoted string, which looks fine on-screen, but you usually don't want the quotes embedded in the string.
– MarkHu
Apr 26 '18 at 2:49
4
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Targeting position:sticky elements that are currently in a 'stuck' state
...an intersection observer to notify when elements with the class
* `.sticky_sentinel--top` become visible/invisible at the top of the container.
* @param {!Element} container
*/
function observeHeaders(container) {
const observer = new IntersectionObserver((records, observer) => {
for (co...
What are Unwind segues for and how do you use them?
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In a Nutshell
An unwind segue (sometimes called exit segue) can be used to navigate back through push, modal or popover segues (as if you popped the navigation item from the navigation bar, closed the popover or dismissed the modally presented view controller). On to...