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How can I get a precise time, for example in milliseconds in Objective-C?
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NSDate and the timeIntervalSince* methods will return a NSTimeInterval which is a double with sub-millisecond accuracy. NSTimeInterval is in seconds, but it uses the double to give you greater precision.
In order to calculate milli...
What does the “@” symbol mean in reference to lists in Haskell?
... = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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Difference between HTML “overflow : auto” and “overflow : scroll”
...g the overflow property's values, I came across these two values: auto and scroll , which adds scrollbar(s) if the content overflows the element.
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Turn off Chrome/Safari spell checking by HTML/css
...www.whatwg.org/specs/web-apps/current-work/multipage/editing.html#spelling-and-grammar-checking
Update: This is now supported in the latest versions of all browsers.
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What replaces cellpadding, cellspacing, valign, and align in HTML5 tables?
... postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9....
What's a 3D doing in this HTML?
...esented as ASCII for email transportation.
In quoted-printable, any non-standard email octets are represented as an = sign followed by two hex digits representing the octet's value. Of course, to represent a plain = in email, it needs to be represented using quoted-printable encoding too: 3D are th...
Why does sed not replace all occurrences?
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You have to put a g at the end, it stands for "global":
echo dog dog dos | sed -r 's:dog:log:g'
^
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How to create multiple directories from a single full path in C#?
...parent directories do not exist.
In MSDN's words, Creates all directories and subdirectories as specified by path.
If the entire path already exists, it will do nothing. (It won't throw an exception)
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C# list.Orderby descending
...ct. Calls to OrderBy or ThenBy are always ascending. The OrderByDescending and ThenByDescending methods are what you'd use for descending.
– StriplingWarrior
Oct 13 '10 at 15:33
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Check if a string matches a regex in Bash script
...=~ ^regex$ ]] && echo "matched" || echo "did not match"
where commands after && are executed if the test is successful, and commands after || are executed if the test is unsuccessful.
Note this is based on the solution by Aleks-Daniel Jakimenko in User input date format verification...