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In our last primer we saw the Fourier series, which flushed out the notion that a periodic function can be represented as an infinite series of sines and cosines. While this is fine and dandy, and quite a powerful tool, it does not suffice for the real world. In the real world, very little is truly periodic, especially since human measurements can only record a finite period of time. Even things we wish to explore on this blog are hardly pe..
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In our last primer we saw the Fourier series, which flushed out the notion that a periodic function can be represented as an infinite series of sines and cosines. While this is fine and dandy, and quite a powerful tool, it does not suffice for the real world. In the real world, very little is truly periodic, especially since human measurements can only record a finite period of time. Even things we wish to explore on this blog are hardly pe..
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I love this quote and I think it really fits in with what I'm doing with this blog, and in my everyday life. Taking pride in your work is…
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I love this quote and I think it really fits in with what I'm doing with this blog, and in my everyday life. Taking pride in your work is…
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Se siete ai primi passi nello sviluppo di applicazioni web vi consiglio la lettura di SSH: What and How. Senza troppi fronzoli l’articolo spiega le basi di SSH mettendo bene in luce le possibilità offerte da questo importante strumento di lavoro. Ogni giorno molti sviluppatori web usano SSH (“Secure Shell”) per gestire i loro server, fare backup, lavorare in remoto e una miriade di altre cosette. Oggi vi spiego cos’è e da dove viene SSH..
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Finding stories in your backlog, locating a bug that was logged last week and rediscovering the acceptance criteria on an older story all require a good search capability. The need to find specific cards more easily and consistently in a Mingle project, especially with a large number of cards, has been widely requested. And we’ve heard you.
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Se siete ai primi passi nello sviluppo di applicazioni web vi consiglio la lettura di SSH: What and How. Senza troppi fronzoli l’articolo spiega le basi di SSH mettendo bene in luce le possibilità offerte da questo importante strumento di lavoro. Ogni giorno molti sviluppatori web usano SSH (“Secure Shell”) per gestire i loro server, fare backup, lavorare in remoto e una miriade di altre cosette. Oggi vi spiego cos’è e da dove viene SSH..
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Se siete ai primi passi nello sviluppo di applicazioni web vi consiglio la lettura di SSH: What and How. Senza troppi fronzoli l’articolo spiega le basi di SSH mettendo bene in luce le possibilità offerte da questo importante strumento di lavoro. Ogni giorno molti sviluppatori web usano SSH (“Secure Shell”) per gestire i loro server, fare backup, lavorare in remoto e una miriade di altre cosette. Oggi vi spiego cos’è e da dove viene SSH..
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I encountered this error while setting up a Jenkins job to automate our Maven release process. [INFO] EXECUTING: cmd.exe /X /C "hg commit --message "[maven-release-plugin] prepare for next development iteration" c:\jenkins\jobs\Release\workspace\pom.xml" [DEBUG] abort: C:\Jenkins\jobs\Release\workspace\pom.xml not under root [ERROR] EXECUTION FAILED Execution of cmd : commit failed with exit code: -1. Working directory was: c:\jenkins..
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Where have I been for the past month? Well, I’ve been heads-down helping to launch the internet of things. Now that we have launched, I can…
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If you're reading this, you may be attempting a large scale organizational change of some kind. And perhaps you are feeling overwhelmed at the huge amount of literature available in "the Google" about how to change a large organization.
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You are a ninja-rockstar developer with a billion dollar idea. You write Ruby and Javascript. You like BDD, responsive design, HTML5 and node.js. You are really good at UX and quickly producing a prototype. You have been working on your app for a few months. Now it’s time to deploy your app. Because you are a hot new start-up, you will of course use AWS. You spend a few hours trying to figure out how many of which instance type you....
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You are a ninja-rockstar developer with a billion dollar idea. You write Ruby and Javascript. You like BDD, responsive design, HTML5 and node.js. You are really good at UX and quickly producing a prototype. You have been working on your app for a few months. Now it’s time to deploy your app. Because you are a hot new start-up, you will of course use AWS. You spend a few hours trying to figure out how many of which instance type you....
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If you really care about your sanity and the sanity of those around you, you probably start most projects by creating a build script of some description. 1 If you've compiled Java or .NET, or if you read the Ant primer then you're probably familiar with writing an XML based build script. Adobe Flex application can be built in the same way, with just a few steps. Prerequisites Basic Compilation We'll start by creating a very basic build.
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I thought I’d take a moment to present one possible path, or set of alternate paths, for learning Clojure, a modern Lisp implemented on top of the Java Virtual Machine. Update: Since this was written in 2012, a number of additional excellent books have come out. These include Carin Meier’s Living Clojure ; Vandgrift and Miller, Clojure Applied ; and Daniel Higginbotham’s, Clojure for the Brave and True . These are all great ch....
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I thought I’d take a moment to present one possible path, or set of alternate paths, for learning Clojure, a modern Lisp implemented on top of the Java Virtual Machine. Update: Since this was written in 2012, a number of additional excellent books have come out. These include Carin Meier’s Living Clojure ; Vandgrift and Miller, Clojure Applied ; and Daniel Higginbotham’s, Clojure for the Brave and True . These are all great ch....
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I thought I’d take a moment to present one possible path, or set of alternate paths, for learning Clojure, a modern Lisp implemented on top of the Java Virtual Machine. Update: Since this was written in 2012, a number of additional excellent books have come out. These include Carin Meier’s Living Clojure ; Vandgrift and Miller, Clojure Applied ; and Daniel Higginbotham’s, Clojure for the Brave and True . These are all great ch....
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Problem: Derive the double angle identities $$\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\\ \cos(2\theta) = \cos^2(\theta) – \sin^2(\theta)$$ Solution: Recall from linear algebra how one rotates a point in the plane. The matrix of rotation (derived by seeing where $ (1,0)$ and $ (0,1)$ go under a rotation by $ \theta$, and writing those coordinates in the columns) is $$A = \begin{pmatrix} \cos(\theta) & -\sin(\theta) \\\ \sin(\theta) & \cos(..
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Problem: Derive the double angle identities $$\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\\ \cos(2\theta) = \cos^2(\theta) – \sin^2(\theta)$$ Solution: Recall from linear algebra how one rotates a point in the plane. The matrix of rotation (derived by seeing where $ (1,0)$ and $ (0,1)$ go under a rotation by $ \theta$, and writing those coordinates in the columns) is $$A = \begin{pmatrix} \cos(\theta) & -\sin(\theta) \\\ \sin(\theta) & \cos(..
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Problem: Derive the double angle identities $$\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\\ \cos(2\theta) = \cos^2(\theta) – \sin^2(\theta)$$ Solution: Recall from linear algebra how one rotates a point in the plane. The matrix of rotation (derived by seeing where $ (1,0)$ and $ (0,1)$ go under a rotation by $ \theta$, and writing those coordinates in the columns) is $$A = \begin{pmatrix} \cos(\theta) & -\sin(\theta) \\\ \sin(\theta) & \cos(..
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Donations If you appreciate this tool, please consider a donation. It truly helps me out. PayPal : GitHub : Ko-Fi : Playing Minecraft, I like making circular things. I used a chart while I was building, but wanted to be able to make variable size ovals which is something I couldn't find a decent chart of or generator capable of, so I created this! Go Fullscreen Show Old Generator Fo..
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Donations If you appreciate this tool, please consider a donation. It truly helps me out. PayPal : GitHub : Ko-Fi : Playing Minecraft, I like making circular things. I used a chart while I was building, but wanted to be able to make variable size ovals which is something I couldn't find a decent chart of or generator capable of, so I created this! Go Fullscreen Show Old Generator Fo..
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This is not going to be a very popular opinion considering my reader demographic, but I’ve grown a little sick of the gaming community as a whole and recent whining about Diablo 3 has triggered…well…this post. Why do so many of us have to be so negative about everything that comes out? Ok, I understand things like being frustrated about server downtime, or installation problems, or major bugs. I completely understand the frustration there..
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Why I recommend CloudFlare and why you should try it too
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www.jimwestergren.com
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14 years ago
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eng
CloudFlare is a both a proxy and a CDN (content delivery network). It was recommended to me by Magnus Bråth. Quoted from them: On average, a website on CloudFlare loads twice as fast uses 60% less bandwidth has 65% fewer requests is way more secure All for free! Never heard of them? According this recent [...]
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Why I recommend CloudFlare and why you should try it too
-
www.jimwestergren.com
-
14 years ago
-
eng
CloudFlare is a both a proxy and a CDN (content delivery network). It was recommended to me by Magnus Bråth. Quoted from them: On average, a website on CloudFlare loads twice as fast uses 60% less bandwidth has 65% fewer requests is way more secure All for free! Never heard of them? According this recent [...]
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Why I recommend CloudFlare and why you should try it too
-
www.jimwestergren.com
-
14 years ago
-
eng
CloudFlare is a both a proxy and a CDN (content delivery network). It was recommended to me by Magnus Bråth. Quoted from them: On average, a website on CloudFlare loads twice as fast uses 60% less bandwidth has 65% fewer requests is way more secure All for free! Never heard of them? According this recent [...]
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Why I recommend CloudFlare and why you should try it too
-
www.jimwestergren.com
-
14 years ago
-
eng
CloudFlare is a both a proxy and a CDN (content delivery network). It was recommended to me by Magnus Bråth. Quoted from them: On average, a website on CloudFlare loads twice as fast uses 60% less bandwidth has 65% fewer requests is way more secure All for free! Never heard of them? According this recent [...]
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Usando Git capita ogni tanto, vuoi per stanchezza o per distrazione, di lanciare commit sbagliate. Stamattina m’è capitato di sistemare del codice, testarlo e fare la commit… solo per scoprire di aver lavorato sulla branch sbagliata! Non è la prima volta che mi succede e non sarà nemmeno l’ultima. Poiché ho scarsa memoria ogni volta mi tocca usare google e ripescare quei due o tre comandi utili in questi casi. Ho pensato di appuntarli qui, ..
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Usando Git capita ogni tanto, vuoi per stanchezza o per distrazione, di lanciare commit sbagliate. Stamattina m’è capitato di sistemare del codice, testarlo e fare la commit… solo per scoprire di aver lavorato sulla branch sbagliata! Non è la prima volta che mi succede e non sarà nemmeno l’ultima. Poiché ho scarsa memoria ogni volta mi tocca usare google e ripescare quei due o tre comandi utili in questi casi. Ho pensato di appuntarli qui, ..
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Feature Injection has been my favorite will-o'-the-wisp over the past month or so, starting from the point where I discovered that the "founding document" for the concept is a set of photos of Chris Matt's moleskine notebook which he wrote on a plane and uploaded to picasa in 2009. I'm still digesting the ideas, which I was completely unable to read in photo form, but was further able to track down as a set of comics on Agile Journal as fo..
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