mossprescott’s gists

mossprescott / gist:7d96067b651c67d7c3b2

Created July 2, 2014 18:04

Two styles for closing parens

mossprescott / gist:7819ae83d223b93a43b9

Created July 2, 2014 22:03

Fancy ExprOp phase, handling "range" array underneath Between

	def ExprPhase: PhaseE[LogicalPlan, PlannerError, Option[BsonField], Option[ExprOp]] = lpBoundPhaseE {
	type Input = Option[BsonField]
	type Output = PlannerError \/ Option[ExprOp]

	toPhaseE(Phase { (attr: Attr[LogicalPlan, Option[BsonField]]) =>
	scanPara0(attr) { (orig: Attr[LogicalPlan, Input], node: LogicalPlan[Attr[LogicalPlan, (Input, Output)]]) =>
	def emit(expr: ExprOp): Output = \/- (Some(expr))

	// Promote a bson field annotation to an expr op:
	def promoteField = \/- (orig.unFix.attr.map(ExprOp.DocField.apply _))

mossprescott / WriterT.scala

Last active August 29, 2015 14:04

WriterT examples

	// See http://stackoverflow.com/a/11951799

	// Just Writer:

	def calc1a: Writer[List[String], Int] = Writer("doing calc" :: Nil, 11)
	def calc1b: Writer[List[String], Int] = Writer("other calc" :: Nil, 22)

	val r1 = for {
	a <- calc1a
	b <- calc1b

mossprescott / gist:b188efc35a0f51cca6c5

Created July 23, 2014 19:38

Building a Map from several mismatched Options

	/*
	Say you have a handful of options and need to build a single map containing a key for each non-empty value, with some transformation of each.

	Here's one way to do it, is there a more elegant way?
	*/

	val o1: Option[Int]
	val o2: Option[String]
	val v3: Int

mossprescott / cleanupMongo.js

Created August 24, 2014 21:05

Drop temp collections and run repairDatabase to recover unused space

	// run with mongo shell:
	//
	// $ mongo cleanupMongo.js
	//
	// $ mongo
	// > r2-ds045089:PRIMARY> load('cleanupMongo.js')


	function dbSize() {
	return db.stats().fileSize/(1024*1024) + " MiB";

mossprescott / cors.html

Last active August 29, 2015 14:07

Simple test for query request with Destination header

	<html>
	<head>
	<title>Simple CORS test</title>
	<script type="text/javascript">
	var req = new XMLHttpRequest()
	// req.open("GET", "http://localhost:8080/metadata/fs/", true)

	req.open("GET", "http://localhost:8080/query/fs/?q=select+*+from+zips+limit+10", true)
	req.send()

mossprescott / gist:17a30a1829c3516c3166

Created December 12, 2014 23:01

JTextField's InputMap (Mac OS X, JDK 1.8.0_20)

	ctrl pressed A: select-all
	ctrl pressed BACK_SLASH: unselect
	ctrl pressed BACK_SPACE: delete-previous-word
	ctrl pressed C: copy-to-clipboard
	ctrl pressed DELETE: delete-next-word
	ctrl pressed H: delete-previous
	ctrl pressed INSERT: copy-to-clipboard
	ctrl pressed KP_LEFT: caret-previous-word
	ctrl pressed KP_RIGHT: caret-next-word
	ctrl pressed LEFT: caret-previous-word

mossprescott / gist:3086d6c31debfecd697a

Created December 12, 2014 23:19

Teaching Swing how text works on the Mac

	if (scala.util.Properties.isMac) {
	import java.awt.event.KeyEvent._
	import javax.swing.KeyStroke.getKeyStroke

	val cmd = java.awt.Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()
	val opt = java.awt.event.InputEvent.ALT_DOWN_MASK
	val shift = java.awt.event.InputEvent.SHIFT_DOWN_MASK

	val extraKeys = Map(
	getKeyStroke(VK_X, cmd) -> "cut-to-clipboard",

mossprescott / gist:1b81806462e0b13b3ecc

Created February 20, 2015 20:10

SimpleMaps don't match

	[info] x plan select with wildcard and two fields
	[error] 'Right($SimpleMap($Read(Collection("zips")),(function (__rez) {
	[error] for (var __attr in (_)) if (_.hasOwnProperty(__attr)) __rez[__attr] = _[__attr];
	[error] __rez.city2 = (_ != null) ? _.city : undefined;
	[error] __rez.pop2 = (_ != null) ? _.pop : undefined;
	[error] return __rez
	[error] })(
	[error] { })))' is Right but
	[error] trees are not equal:
	[error] Chain

mossprescott / gist:d43ab43942b86b6d7f31

Last active August 29, 2015 14:16

city	pop	loc.0
boulder	100,000	81.0

a
1

city	loc.0	loc.1	pop	state

Moss Prescott mossprescott