Regular expressions

On-line tools

• http://regexr.com
• https://www.debuggex.com
• https://regex101.com

PaaS

"Application infrastructure functionality, enriched with cloud characteristics and offered as a service,

is platform as a service (PaaS). Gartner refers to it more precisely as cloud application infrastructure services."

"Application platform as a service (aPaaS) is a form of PaaS that provides a platform to

support application development, deployment and execution in the cloud."

Pure PaaS players

• Pivotal Cloud Foundry.
• Red Hat OpenShift.
• Aprendaa.
• Heroku.
• Engine Yard.

IaaS hybrid players

• Google?
• Microsoft Azure Cloud Services?
• Amazon AWS
• ...

SaaS hybrids players

• Salesforce
• ...

PaaS frameworks

• Pivotal Cloud Foundry.
• Red Hat OpenShift.
• Apache Stratos.

Related software

• OpenStack
• Docker
• Kubernetes
• Chef

References

•  PaaS and IaaS have really crossed features: http://www.gfi.com/blog/is-paas-the-new-cloud-or-a-passe-term/
• aPaaS Grtner Magic Quadrant 2015: https://www.ibm.com/cloud-computing/files/GARTNER_COMP_magic_quadrant_for_enterpris_271188_Bluemix.pdf

Functional programming

• Why:
• General sateless tendency: cloud & scaling
• No locks (multi-thread)
• Easy reading
• Easy testing
• JavaScript boom?
• How: 
• Pure functions (no side-effects)
• Immutability
• Composition (not inheritance)
• Deferred execution
• Currying
•  ...
• Related: funcional reactive programming.

Why functional programming matters:
https://www.cs.kent.ac.uk/people/staff/dat/miranda/whyfp90.pdf

FP Languages

• Erlang
• Haskell
• OCami
• LISP
• Scheme
• Standard ML
• Wolfram
• Frege (JVM): https://github.com/Frege/frege
• Clojure (JVM)

Hybrid Languages

• Scala (JVM)
• F#

Nginx reverse proxy

proxy_pas without path:

location /some/path/ {

   proxy_pass http://new.domain;
}

http://orig.domain/some/path/x --> http://new.domain/some/path/x

proxy_pas case insensitive:

location ~* /some/path/ {
   proxy_pass http://new.domain;
}

http://orig.domain/SOME/Path/x --> http://new.domain/SOME/Path/x

SSL:

Redirect HTTP to HTTPS: https://bjornjohansen.no/redirect-to-https-with-nginx
Certificate: https://www.digitalocean.com/community/tutorials/how-to-create-a-ssl-certificate-on-nginx-for-centos-6
Optimal (TLS, etc): https://bjornjohansen.no/optimizing-https-nginx

Multiple browser windows applications

Basic Techniques:

• HTML5 postMessage: provides inter-windows message based communication.

• HTML5 local storage: provides a shared storage for all the windows. Windows can be notified of local storage updates through events so this technique can also be used as a postMessage replacement.

• Direct JS: to be tested. ¿limitations?.

childWin = openWindow();

childWin.anyFunction();

Auxiliary techniques

• HTML5 Webworkers.

• Angular app bootstraping tweaks.

Referenes:

• Web-workers / postMessage: https://www.youtube.com/watch?v=-o8B4TE18gI
• Setting the size and position (demo): https://hsablonniere.github.io/window-popup/
• Multiple A2 apps on the same page: https://blog.sstorie.com/bootstrapping-multiple-angular-2-applications-on-the-same-page/
• Sync AngularJS apps through local storage: https://www.undefinednull.com/2014/02/25/angularjs-real-time-model-persistence-using-local-storage/
• Shared authentication through local storage: https://www.guya.net/2015/06/12/sharing-sessionstorage-between-tabs-for-secure-multi-tab-authentication/

Immutables on JavaScript & TypeScript

• JS (most used): https://facebook.github.io/immutable-js/
• JS: https://github.com/rtfeldman/seamless-immutable
• TypeScript lib (decorators): https://github.com/danielearwicker/doop
• TypeScript 2.0 readonly: https://basarat.gitbooks.io/typescript/content/docs/types/readonly.html

OpenLayers 3 resources

https://github.com/webgeodatavore/awesome-openlayers
http://viglino.github.io/ol3-ext/