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What is in your Mathematica tool bag? [closed]
We all know that Mathematica is great, but it also often lacks critical functionality. What kind of external packages / tools / resources do you use with Mathematica?
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Getting a structural type with an anonymous class's methods from a macro
...ral type with the named member. */
def bar(name: String): Any = macro bar_impl
def bar_impl(c: Context)(name: c.Expr[String]) = {
import c.universe._
val anon = TypeName(c.freshName)
// next week, val q"${s: String}" = name.tree
val Literal(Constant(s: String)) = name.tree
v...
What is 'Pattern Matching' in functional languages?
...wesome.
Algebraic data types in a nutshell
ML-like functional languages allow you define simple data types called "disjoint unions" or "algebraic data types". These data structures are simple containers, and can be recursively defined. For example:
type 'a list =
| Nil
| Cons of 'a * 'a ...
Alphabet range in Python
...gt;>> string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
If you really need a list:
>>> list(string.ascii_lowercase)
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
And to do it with range
>&g...
Find UNC path of a network drive?
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What a practical and quick solution for all of us in corporate lock-down environments! Much appreciated workaround!
– Marcus Mangelsdorf
Sep 17 '19 at 13:14
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Looping over arrays, printing both index and value
...., not splitting them on whitespace. If foo=(x 'y z'), then f "${foo[@]}" calls f with two arguments, x and 'y z'. Metadata queries like "${!foo[@]}" and "${#foo[@]}" similarly act on foo as an array.
– BallpointBen
Sep 5 '18 at 1:23
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Saving vim macros
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The :mkexrc (or :mkvimrc) command can be used to save all the current :map and :set settings to a file. See :help mkexrc for details.
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How can I group data with an Angular filter?
...DATE: jsbin Remember the basic requirements to use angular.filter, specifically note you must add it to your module's dependencies:
(1) You can install angular-filter using 4 different methods:
clone & build this repository
via Bower: by running $ bower install angular-filter from ...
Fastest way to extract frames using ffmpeg?
... @Evi1M4chine just remove the -r parameter this will extract all frames
– studioj
Nov 15 '16 at 6:14
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When to encode space to plus (+) or %20?
...value is query value with a space, but the folder name in the path is literally foo+bar, not foo bar.
%20 is a valid way to encode a space in either of these contexts. So if you need to URL-encode a string for inclusion in part of a URL, it is always safe to replace spaces with %20 and pluses with ...