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George MacKerron: code blog

GIS, software development, and other snippets

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PAGE TITLE
George MacKerron: code blog | blog.mackerron.com Reviews
<META>
DESCRIPTION
GIS, software development, and other snippets
<META>
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1 array#compact
2 values
3 return
4 the existential operator
5 written by george
6 posted in coffeescript
7 javascript
8 no more busywork
9 preamble
10 property
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array#compact,values,return,the existential operator,written by george,posted in coffeescript,javascript,no more busywork,preamble,property,synthesize,release,call in,dealloc,nowadays a single,retain,autorelease,nsnumber,nsarray,nsdictionary,problem,times
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George MacKerron: code blog | blog.mackerron.com Reviews

https://blog.mackerron.com

GIS, software development, and other snippets

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1

PostGIS at George MacKerron: code blog

http://blog.mackerron.com/category/gis/postgis

George MacKerron: code blog. GIS, software development, and other snippets. Archive for the ‘PostGIS’ Category. Map algebra with callbacks in PostGIS 2.1. I’ve been playing with the much-enhanced raster support in PostGIS 2.1 in the last few days. Amongst other things I’ve been producing maps with. Which has changed a little since 2.0. The example callback function in the documentation. And here’s something that caught me out: unless you’re passing some. Don’t declare your callback function to be. Instal...

2

SQL at George MacKerron: code blog

http://blog.mackerron.com/category/sql

George MacKerron: code blog. GIS, software development, and other snippets. Archive for the ‘SQL’ Category. Map algebra with callbacks in PostGIS 2.1. I’ve been playing with the much-enhanced raster support in PostGIS 2.1 in the last few days. Amongst other things I’ve been producing maps with. Which has changed a little since 2.0. The example callback function in the documentation. And here’s something that caught me out: unless you’re passing some. Don’t declare your callback function to be. Install&#4...

3

Fixing Bluetooth sleep issues with MacBook and Magic Trackpad at George MacKerron: code blog

http://blog.mackerron.com/2012/10/11/bluetooth-sleep-macbook-trackpad

George MacKerron: code blog. GIS, software development, and other snippets. Fixing Bluetooth sleep issues with MacBook and Magic Trackpad. We have an old MacBook (the original white Intel model from 2006) running EyeTV. It turns out that the post-sleep unresponsiveness may also be fixed by restarting the Bluetooth daemon, by typing. This is good news, because we can automate this action using sleepwatcher. To set up sleepwatcher to restart Bluetooth on wake, first type. Then paste in all of the following:.

4

No more busywork! DRY up your NSString constants at George MacKerron: code blog

http://blog.mackerron.com/2014/07/02/dry-nsstring-constants

George MacKerron: code blog. GIS, software development, and other snippets. DRY up your NSString constants. In the last few years, Objective-C has become enormously. Er For example: in the past, adding a property to a class meant adding several of: an ivar, a. A getter/setter, and a. Worse, renaming or deleting the property meant updating all these. This was error-prone busywork, and made iOS development frankly pretty tedious. Is often all that’s needed. Plus of course we’ve lost all that. And the one-l...

5

Objective-C SHA1 categories for NSData and NSString at George MacKerron: code blog

http://blog.mackerron.com/2012/06/19/sha1-category-nsdata-nsstring

George MacKerron: code blog. GIS, software development, and other snippets. Objective-C SHA1 categories for NSData and NSString. I recently needed to calculate a SHA1. Hash in an iOS app. In iOS4 it’s possible to use. Has always supported iOS3. I therefore added NSD. Tring categories to a public domain C implementation instead. This remains public domain: do with it what you will. It relies on a hex-encoding category on NSD. Ata, which you can also consider public domain. Gm SHA1Digest; -. SHA1 CTX; void.

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blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

london underground – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/london-underground

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Thursday 21 May 2015. The Tube Map is probably London’s most famous con […]. Continue reading ». Visualising Disabled Freedom Pass trips on the London Underground. Monday 2 June 2014. Disabled Freedom Pass Card journeys on the London Underground from Gareth Simons on Vimeo. Continue reading ». Visualising Disabled Freedom Pass trips on the London Underground. The personal...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

cost – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/cost

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). COST ENERGIC meeting Tallinn 21-22 May. Friday 22 May 2015. Continue reading ». VGI and indigenous knowledge COST Energic Video. Monday 18 May 2015. Continue reading ». London’s Incendiary House Prices. Friday 24 October 2014. Above is a map from Mapping London co-editor Dr Cheshir […]. Continue reading ». Thursday 10 July 2008. I came across an amusing coincidence betwee...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

COST IC1203 – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/cost-ic1203

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). A review of volunteered geographic information quality assessment methods. Thursday 2 June 2016. Continue reading ». COST Energic Summer School on VGI and Citizen Science in Malta. Thursday 11 June 2015. Continue reading ». COST ENERGIC meeting Tallinn 21-22 May. Friday 22 May 2015. The COST Energic network is progressing in its 3rd year. The previous post showed one ...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

transport for london – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/transport-for-london

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Category: transport for london. London Connections: A Geographic Tube Map. Tuesday 15 September 2015. Continue reading ». Monday 22 June 2015. Transport for London are introducing an all-night servi […]. Continue reading ». Thursday 21 May 2015. The Tube Map is probably London’s most famous con […]. Continue reading ». Friday 29 November 2013. Continue reading ». Why econ...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

overground – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/overground

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Thursday 21 May 2015. The Tube Map is probably London’s most famous con […]. Continue reading ». A Week in the Life of the Underground (& Overground and DLR). Friday 4 May 2012. Perhaps inspired by Joy Division’s Unknown Pleasu […]. Continue reading ». Week in the life. Research blog on urban environment and citizen movements in complex networks. A Science of Cities.

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

citizen science – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/citizen-science

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Science Foo Camp 2016. Monday 25 July 2016. Continue reading ». New paper: Usability and interaction dimensions of participatory noise and ecological monitoring. Wednesday 20 July 2016. Continue reading ». New Paper: The Three Eras of Environ-mental Information: the Roles of Experts and the Public. Wednesday 20 July 2016. Since the first Eye on Earth conference in 2011, I...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

tube – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/tube

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Square Deal: A Tube Map of House Prices. Wednesday 10 August 2016. Continue reading ». Network Rail Project Map. Wednesday 1 June 2016. Continue reading ». Thursday 14 April 2016. The tube map is almost certainly London’s most widely produced and collected map, with many millions of the pocket version being issued for free every year by TfL from London’s 270 t...The tube ...

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

Quaestio – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/author/clare

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Wednesday 2 December 2015. Research has to be ‘written up’. To some, writing comes easily – though I suspect this is on the basis of learning through experience. To many, especially research students at the time of thesis writing, it seems like a mountain … Continue reading →. Continue reading ». 31: Too many journals, too many conferences? Wednesday 2 December 2015.

blogs.casa.ucl.ac.uk blogs.casa.ucl.ac.uk

flows – The CASA Blog Network

http://blogs.casa.ucl.ac.uk/category/flows

The CASA Blog Network. The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA). Modelling World 2016: Complexity in Land Use Transport Models. Wednesday 1 June 2016. Continue reading ». Mobility, Transit and Big Data. Thursday 21 April 2016. Continue reading ». Graduate Mobility and Closing the Productivity Gap for UK Cities. Monday 11 April 2016. By Duncan A Smith. There has been much discussion in recent years about the UK ‘productivity puzzl...

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Recent Posts – The Split Brain

May 05, 2015. It’s been almost an entire year since I’ve posted here. A lot can happen in a year. If youknow me well, you know it’s. May 11, 2014. As a technologist and a programmer, I’ve signed myself up for lifelong learning.Unless I want to learn COBOL and main. The C Programming Language: Continuous Learning. October 14, 2013. This weekend I’ve started a book that’s been on my shelf for ages, but I somehowhaven’t found the time to read yet: . Updates to the blog. October 13, 2013. January 16, 2012.

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The Official Blog of Mackerel. Sign Up for Mackerel. Monitor config API released, easier to code monitor configurations, etc. This week’s Mackerel update:. For dealing with monitor operations has been released. For more information please refer to API specs. Monitor configuration now possible from the command line with mkr monitors command. In conjunction with the release of the monitor configuration API. We have added some subcommands for monitor configuration to the command line tool. Monitor config AP...

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George MacKerron: code blog

George MacKerron: code blog. GIS, software development, and other snippets. All that’s great about CoffeeScript in 40 characters. Today, I needed a JavaScript equivalent of Ruby’s. Which returns the array stripped of any. A standard JavaScript implementation looks like this:. Arrayprototype.compact = function() { var x, i, len, results; results = []; for ( i = 0, len = this.length; i len; i ) { x = this[ i]; if (x! Null) { results.push(x); } } return results; };. Array: compact = - x for x in @ when x?

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