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Last week, I was invited to do a coding dojo for the Java user group in Bergen. I have written a few words about the dojo part of the exercise in a previous blogpost. After “classical” TDD-training, I decided to try something different and gave the group a competition to play with: Extreme startup, a workshop with software created by @rchatley and @mattwynne. The workshop was a huge success and I’m hoping to repeat it soon.
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A Bully By Any Other Name From the New York Times: “Shopping online in late July, Clarabelle Rodriguez typed the name of her favorite eyeglass brand into Google’s search bar. In moments, she found the perfect frames — made by a French company called Lafont — on a Web site that looked snazzy and stood at the top of the search results. Not the tippy-top, where the paid ads are found, but under those, on Google’s version of the gold-medal podi..
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A Bully By Any Other Name From the New York Times: “Shopping online in late July, Clarabelle Rodriguez typed the name of her favorite eyeglass brand into Google’s search bar. In moments, she found the perfect frames — made by a French company called Lafont — on a Web site that looked snazzy and stood at the top of the search results. Not the tippy-top, where the paid ads are found, but under those, on Google’s version of the gold-medal podi..
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A Bully By Any Other Name From the New York Times: “Shopping online in late July, Clarabelle Rodriguez typed the name of her favorite eyeglass brand into Google’s search bar. In moments, she found the perfect frames — made by a French company called Lafont — on a Web site that looked snazzy and stood at the top of the search results. Not the tippy-top, where the paid ads are found, but under those, on Google’s version of the gold-medal podi..
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I write Python and Javascript code. I use Django and jQuery. And I cringe every time I have to run gem install x. I only have a limited understanding of Ruby and hardly any of Ruby on Rails. It seems disorganized to me and hard to process. All this is fine – I don’t have to use any of it if I don’t like it, right? I always knew there was something wrong with the way Ruby works. I don’t mean wrong like murdering children, I just mean wrong....
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I write Python and Javascript code. I use Django and jQuery. And I cringe every time I have to run gem install x. I only have a limited understanding of Ruby and hardly any of Ruby on Rails. It seems disorganized to me and hard to process. All this is fine – I don’t have to use any of it if I don’t like it, right? I always knew there was something wrong with the way Ruby works. I don’t mean wrong like murdering children, I just mean wrong....
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Dangling Nodes and Non-Uniqueness Recall where we left off last time. Given a web $ W$ with no dangling nodes, the link matrix for $ W$ has 1 as an eigenvalue, and if the corresponding eigenspace has dimension 1, then any associated eigenvector gives a ranking of the pages in $ W$ which is consistent with our goals. The first problem is that if there is a dangling node, our link matrix has a column of all zeros, and is no longer column-stoc..
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Dangling Nodes and Non-Uniqueness Recall where we left off last time. Given a web $ W$ with no dangling nodes, the link matrix for $ W$ has 1 as an eigenvalue, and if the corresponding eigenspace has dimension 1, then any associated eigenvector gives a ranking of the pages in $ W$ which is consistent with our goals. The first problem is that if there is a dangling node, our link matrix has a column of all zeros, and is no longer column-stoc..
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Dangling Nodes and Non-Uniqueness Recall where we left off last time. Given a web $ W$ with no dangling nodes, the link matrix for $ W$ has 1 as an eigenvalue, and if the corresponding eigenspace has dimension 1, then any associated eigenvector gives a ranking of the pages in $ W$ which is consistent with our goals. The first problem is that if there is a dangling node, our link matrix has a column of all zeros, and is no longer column-stoc..
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My next book will be Practical Math for Programmers A High-Level Overview of Fully Homomorphic Encryption Searching for Riemann Hypothesis Counterexamples Linear Programming and Healthy Diets Hybrid Images Bezier Curves and Picasso
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My next book will be Practical Math for Programmers A High-Level Overview of Fully Homomorphic Encryption Searching for Riemann Hypothesis Counterexamples Linear Programming and Healthy Diets Hybrid Images Bezier Curves and Picasso
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My next book will be Practical Math for Programmers A High-Level Overview of Fully Homomorphic Encryption Searching for Riemann Hypothesis Counterexamples Linear Programming and Healthy Diets Hybrid Images Bezier Curves and Picasso
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I have tried dozens of code editors, text editors and IDEs. I have carefully weighed the pros and cons of each. I have studied features, extensibility, themes, syntax highlighting options, price, and many other criteria. I have reached my verdict and I’m ready to publish my findings. The best IDE is the one that works for you.
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I have tried dozens of code editors, text editors and IDEs. I have carefully weighed the pros and cons of each. I have studied features, extensibility, themes, syntax highlighting options, price, and many other criteria. I have reached my verdict and I’m ready to publish my findings. The best IDE is the one that works for you.
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I love talking about scalability. Everyone has their own opinion, their own way of performing benchmarks and their own conclusions. And we all know that this is very silly. I recently came across an article by Ted Dziuba that summarizes it very nicely for you: Shut up about scalability, no one is using your app anyway. I love how the author explains the use of the word scalability in this day and age: The most common butth..
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I love talking about scalability. Everyone has their own opinion, their own way of performing benchmarks and their own conclusions. And we all know that this is very silly. I recently came across an article by Ted Dziuba that summarizes it very nicely for you: Shut up about scalability, no one is using your app anyway. I love how the author explains the use of the word scalability in this day and age: The most common butth..
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Story Time Linear algebra was founded around the same time as Calculus (think Leibniz, circa 1700) solely for the purpose of solving general systems of linear equations. The coefficients of a system were written in a grid form, with rows corresponding to equations and columns to the unknown variables. Using a computational tool called the determinant (an awkward, but computable formula involving only the coefficients of the equations in a s..
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Story Time Linear algebra was founded around the same time as Calculus (think Leibniz, circa 1700) solely for the purpose of solving general systems of linear equations. The coefficients of a system were written in a grid form, with rows corresponding to equations and columns to the unknown variables. Using a computational tool called the determinant (an awkward, but computable formula involving only the coefficients of the equations in a s..
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Story Time Linear algebra was founded around the same time as Calculus (think Leibniz, circa 1700) solely for the purpose of solving general systems of linear equations. The coefficients of a system were written in a grid form, with rows corresponding to equations and columns to the unknown variables. Using a computational tool called the determinant (an awkward, but computable formula involving only the coefficients of the equations in a s..
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Last week, I was invited to do a coding dojo for the Java user group in Bergen. I chose a format that let people work more independently rather than the classical style of “lots of people passing the keyboard around and looking on the code on a projector”. The result was an informal, competitive and engaged workshop where people continued playing with the exercise long after the official program was over.
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The Web as a Graph The goal of this post is to assign an “importance score” $ x_i \in [0,1]$ to each of a set of web pages indexed $ v_i$ in a way that consistently captures our idea of which websites are likely to be important. But before we can extract information from the structure of the internet, we need to have a mathematical description of that structure. Enter graph theory.
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The Web as a Graph The goal of this post is to assign an “importance score” $ x_i \in [0,1]$ to each of a set of web pages indexed $ v_i$ in a way that consistently captures our idea of which websites are likely to be important. But before we can extract information from the structure of the internet, we need to have a mathematical description of that structure. Enter graph theory.
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The Web as a Graph The goal of this post is to assign an “importance score” $ x_i \in [0,1]$ to each of a set of web pages indexed $ v_i$ in a way that consistently captures our idea of which websites are likely to be important. But before we can extract information from the structure of the internet, we need to have a mathematical description of that structure. Enter graph theory.
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C asked if I wanted to see X-Men: First Class this past Tuesday and I of course said yes seeing as I heard so many good things about it. And it was worth it! I don’t have a very good long term movie memory so can’t remember much of the other movies aside from the general gist of the story, but I thought this prequel was just awesome in the way it tied in with the general/overall storyline (even though I hear there were some discrepancies in..
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For those of you who already use PuTTY: Here’s a little improvement that’s surprisingly little known. Probably because it is very hard to explain. But I’ll try. Here is how you can avoid starting programs, entering login information or indeed typing passwords when you use PuTTY: Download Putty installer from the PuTTY Download Page. Make sure to grab the “Installer” Install Putty Start PuttyGen from Start -> PuTTY-> PuttyGen Generate a new ..
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The Quest to Capture Speed Companies and researchers spend hundreds of millions of dollars for the fruits of their algorithms. Whether one is indexing websites on the internet for search, folding proteins, or figuring out which warehouse is the most cost-effective to ship a product from, improvements in algorithm speed save immense amounts of money. It’s no surprise then, that a similarly immense amount of money has gone into the mathematic..
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The Quest to Capture Speed Companies and researchers spend hundreds of millions of dollars for the fruits of their algorithms. Whether one is indexing websites on the internet for search, folding proteins, or figuring out which warehouse is the most cost-effective to ship a product from, improvements in algorithm speed save immense amounts of money. It’s no surprise then, that a similarly immense amount of money has gone into the mathematic..
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The Quest to Capture Speed Companies and researchers spend hundreds of millions of dollars for the fruits of their algorithms. Whether one is indexing websites on the internet for search, folding proteins, or figuring out which warehouse is the most cost-effective to ship a product from, improvements in algorithm speed save immense amounts of money. It’s no surprise then, that a similarly immense amount of money has gone into the mathematic..
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Binary Search Binary search is perhaps the first and most basic nontrivial algorithm a student learns. For the mathematicians out there, binary search is a fast procedure to determine whether a sorted list contains a particular element. Here is a pseudocode implementation: # Binary Search: # Given a list L, sorted via the total order <, and a sought # element x, return true iff L contains x. function binarySearch(L, x, <): # base case if(le..
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Binary Search Binary search is perhaps the first and most basic nontrivial algorithm a student learns. For the mathematicians out there, binary search is a fast procedure to determine whether a sorted list contains a particular element. Here is a pseudocode implementation: # Binary Search: # Given a list L, sorted via the total order <, and a sought # element x, return true iff L contains x. function binarySearch(L, x, <): # base case if(le..
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Binary Search Binary search is perhaps the first and most basic nontrivial algorithm a student learns. For the mathematicians out there, binary search is a fast procedure to determine whether a sorted list contains a particular element. Here is a pseudocode implementation: # Binary Search: # Given a list L, sorted via the total order <, and a sought # element x, return true iff L contains x. function binarySearch(L, x, <): # base case if(le..
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The goal of this post is to use prime numbers to make interesting and asymmetric graphics, and to do so in the context of the web design language CSS. Number Patterns For the longest time numbers have fascinated mathematicians and laymen alike. Patterns in numbers are decidedly simple to recognize, and the proofs of these patterns range from trivially elegant to Fields Medal worthy. Here’s an example of a simple one that computer science ge..
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The goal of this post is to use prime numbers to make interesting and asymmetric graphics, and to do so in the context of the web design language CSS. Number Patterns For the longest time numbers have fascinated mathematicians and laymen alike. Patterns in numbers are decidedly simple to recognize, and the proofs of these patterns range from trivially elegant to Fields Medal worthy. Here’s an example of a simple one that computer science ge..
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The goal of this post is to use prime numbers to make interesting and asymmetric graphics, and to do so in the context of the web design language CSS. Number Patterns For the longest time numbers have fascinated mathematicians and laymen alike. Patterns in numbers are decidedly simple to recognize, and the proofs of these patterns range from trivially elegant to Fields Medal worthy. Here’s an example of a simple one that computer science ge..
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How to Create a Live Ubuntu USB Drive With Persistent Storage
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justingarrison.com
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14 years ago
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eng
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Importance on the Web As a society living in the “Information Age,” it comes as no surprise that we are faced with the task of sorting through vast oceans of content. With the admission that most content is actually junk, we must wisely choose the objects of our analysis. The appropriately named site UselessJunk.com certainly doesn’t deserve the same attention as the BBC World News page, and yet within the monstrous heart of the internet, i..
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Importance on the Web As a society living in the “Information Age,” it comes as no surprise that we are faced with the task of sorting through vast oceans of content. With the admission that most content is actually junk, we must wisely choose the objects of our analysis. The appropriately named site UselessJunk.com certainly doesn’t deserve the same attention as the BBC World News page, and yet within the monstrous heart of the internet, i..
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Importance on the Web As a society living in the “Information Age,” it comes as no surprise that we are faced with the task of sorting through vast oceans of content. With the admission that most content is actually junk, we must wisely choose the objects of our analysis. The appropriately named site UselessJunk.com certainly doesn’t deserve the same attention as the BBC World News page, and yet within the monstrous heart of the internet, i..
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You are a Python developer and every time you have to install a Ruby gem you throw up in your mouth a little. Wouldn’t it be nice if you could install Ruby gems into your virtualenv? Yeah, it would. Stick this in your virtualenv’s postactivate script: export GEM_HOME = " $VIRTUAL_ENV /gems" export GEM_PATH = "" export PATH = $PATH: " $GEM_HOME /bin" That’s it! You’re welcome. :) Credit Give credit where credit..
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You are a Python developer and every time you have to install a Ruby gem you throw up in your mouth a little. Wouldn’t it be nice if you could install Ruby gems into your virtualenv? Yeah, it would. Stick this in your virtualenv’s postactivate script: export GEM_HOME = " $VIRTUAL_ENV /gems" export GEM_PATH = "" export PATH = $PATH: " $GEM_HOME /bin" That’s it! You’re welcome. :) Credit Give credit where credit..
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Ever wanted to match a tab while using grep for some reason? The trick (under bash anyway) is to Ctrl+V and then press the tab key so you get whatever you are looking for. $ cat file_to_grep.txt | grep "^log " I was trying to match a file for the exact match of log and then a tab. Without the tab I ended up getting back a bunch of junk results like “logger” “logging” “login” etc…
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