Wilfred

XHP Namespaces

I am not addressing migration/compatibility in this post. This is addressed in the documents linked in 'previous context'

Previous context

• https://github.com/facebook/hhvm/pull/8578
• https://docs.google.com/document/d/1zWf5mQBdVmuDQ65wz93DPC7eCyWLTw_ngeJqIzA65f4/edit#heading=h.cc3sepimajn8
• https://gist.github.com/fredemmott/1e65842fadb9e66e2359

Wilfred

= anObject
	self isIterable & anObject isIterable
		ifTrue: [ ^ value = anObject value ].
	self class = anObject class
		ifFalse: [ ^ false ].
	^ value = anObject value

Wilfred

Segmentation fault Tue Sep  5 19:23:15 2017


/home/wilfred/Downloads/pharo6.1-64/bin/lib/pharo/5.0-201707201942/pharo
Pharo VM version: 5.0-201707201942  Thu Jul 20 20:40:54 UTC 2017 gcc 4.6.3 [Production Spur 64-bit VM]
Built from: CoInterpreter VMMaker.oscog-eem.2254 uuid: 4f2c2cce-f4a2-469a-93f1-97ed941df0ad Jul 20 2017
With: StackToRegisterMappingCogit VMMaker.oscog-eem.2252 uuid: 2f3e9b0e-ecd3-4adf-b092-cce2e2587a5c Jul 20 2017
Revision: VM: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Date: Thu Jul 20 12:42:21 2017 -0700 $ Plugins: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $
Build host: Linux testing-gce-74d10329-bbfd-42e5-8995-b0e3a68c73cb 3.13.0-115-generic #162~precise1-Ubuntu SMP Fri Mar 24 16:47:06 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
plugin path: /home/wilfred/Downloads/pharo6.1-64/bin [default: /home/wilfred/Downloads/pharo6.1-64/bin/lib/pharo/5.0-201707201942/]

Wilfred

whileMatches: aStream do: aBlock
	"Execute block, passing in this instance, for every match in stream.
	
Be extra careful about successful matches which consume no input.
After those, make sure to advance or finish if already at end."

	| wholeMatch reachedEnd |
	reachedEnd := false.
	[ self searchStream: aStream ]
		whileTrue: [ wholeMatch := self subexpression: 1.

Wilfred

def attach_dyn_prop(instance, prop_name, prop_fn):
    """Attach prop_fn to instance with name prop_name.

    Assumes that prop_fn takes self as an argument.

    Reference: https://stackoverflow.com/a/1355444/509706

    """
    class_name = instance.__class__.__name__ + 'Child'
    child_class = type(class_name, (instance.__class__,), {prop_name: property(prop_fn)})

Wilfred

RFC: Use Rust’s regex crate

We want to port Remacs to use a regex crate implemented in Rust. The Rust implementations are highly optimised, and this would simplify the Remacs codebase.

The two major crates are Rust’s regex crate, and the fancy-regex crate.

Wilfred

;;; dashtest2.el --- benchmarking dash  -*- lexical-binding: t -*-

(defun -first-item-fn (lst)
  (car lst))

(defalias '-first-item-alias 'car)

(defun wh/benchmark ()
  (interactive)
  (let ((items (-repeat 20 'foo)))

Wilfred

;; given 1, how do we calculate 3?
(length (key-description (char-to-string 1)))
(length (key-description (string 1)))
(1+ (1+ 1))
(length (number-to-string (ftruncate 1)))
(length (number-to-string (fround 1)))
(length (number-to-string (ffloor 1)))
(length (number-to-string (fceiling 1)))
(length (number-to-string (float 1)))
(length (number-to-string (sqrt 1)))

Wilfred

(cl-defun wh/foo (arg1 arg2 &key (kwarg1 t))
  (list arg1 arg2 kwarg1))

;; We've forgotten arg2, but we get the error:
;; (error "Keyword argument 2 not one of (:kwarg1)")
(wh/foo 1 :kwarg1 2)

;; Instead, it would be clearer to say
;; "Expected a keyword argument (one of (:kwargs1)) but got 1"

Wilfred

;; Loosely based on `erc-remove-text-properties-region'.
(defun wh/remove-text-properties-region ()
  "Remove all text properties from the current buffer."
  (interactive)
  (let ((inhibit-read-only t))
    (set-text-properties (point-min) (point-max) nil)))