icen
Joined 11 years ago
Joined 11 years ago
Once you see +/, you understand ,/ or fn/ - whereas you have to remember that it’s written sum, concatenate, or np.ufunc.accumulate in numpy. The same goes for +\ vs cumsum etc (and you don’t get all of these pre defined).
The difference here means that whilst numpy gets the core array operations down, it’s much less convenient and less self explanatory than the apl system.
(1 ∾˜ " "⊸(¬∘⍷))⊸/
which removes the first space of each occurrence of double spacing ((«¬∘∧⊢)' '=⊢)⊸/
This works by building a boolean mask of spaces, and converting it to a mask of 'is a space, preceded by a space', negates that, and replicates out by that inverted mask (i.e. is not a space preceded by a space):Here's stepping through it with some input.
(' '=⊢) "this is a sentence with many spaces"
⟨ 0 0 0 0 1 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 ⟩
(«' '=⊢) "this is a sentence with many spaces"
⟨ 0 0 0 1 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 ⟩
((«∧⊢)' '=⊢) "this is a sentence with many spaces"
⟨ 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 ⟩
((«¬∘∧⊢)' '=⊢) "this is a sentence with many spaces"
⟨ 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 ⟩
((«¬∘∧⊢)' '=⊢)⊸/ "this is a sentence with many spaces"
"this is a sentence with many spaces"For example, & is monadic 'where' and dyadic 'min' (a logical extension of it being AND on bit-booleans), but this means you get different semantics, even if they all capture the 'where'-ness:
1 3 ~ &0 1 0 1 / when applied to a list, gives the indices of true elements
`b`d ~ &`a`b`c`d!0 1 0 1 / when applied to a dict, gives their keys
In both cases, you get that `x@&x` works, as `&x` will yield appropriate indices for `x`, but what that actually does has changed. In other languages, these would be spelled very differently, and so do seem like an overload, but sometimes it is just a point of view.As for why it's obvious- it's not, really, but it's no less obvious than the word `where`, and you have already learnt it, as it is (as it seems to me at least) to be punned on the C syntax (same as `*`, which gives `first`).
It’s regrettable that this is necessary, but with so few Ethernet ports on laptops it’s harder to install these things without access to WiFi.
I’ve not used it myself, but it appears to be the thing you’re wanting?
{ foo[x, bar] }(Not OP) Possibly, but one of the repeated themes in Boatmurdered is a number of fortress defenses (some with considerable collateral damage) attached to a variety of scattered and unmarked levers.
Does pulling this lever lower the drawbridge, irrigate the fields, or douse the world in cleansing magma? Only one way to tell!
I did eventually find this in the documentation, under the "regexp selections" section. I think it should be more prominently displayed in other sections, since it's a natural thing to want (at first).
I am enjoying the editor (as a current helix user), and looking forward to trying it more.
I think there are far worse codebases!