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• Fastest way to set up a JSON server on my local machine [closed]

  - by Mohsen

  I am a front-end developer. For many experiements I do I need to have a server that talks JSON with my client side app. Normally that server is a simple server that response to my POSTs and GETs. For example I need to setup a server that saves, modifies and read data from a "library" database like this: POST /books create a book GET /book/:id gets a book and so on... What is the fastest to set up and easiest technology stack for database and server in this case? I am open to use Ruby, Nodejs and anything that do the job fast and easy. Is there any framework (on any language) that do stuff like this for me?

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• HTML5-Canvas: worth using ImpactJS or other framework?

  - by John

  I've been making an HTML5 game without any type of external framework. I haven't found a reason to use one so far. However, there is one thing I'm wondering about. On my Galaxy Nexus, I get about ~40fps. While that would usually be a decent framerate, my game is a rather fast paced game with a gamepad. Because of this, it feels very unsatisfying to play when not capped at 60fps. Are there frameworks out there that can improve performance without toning down on graphics? Or is there something I could do myself without necessarily having to use a framework? I've looked over the basic things such as sticking to integer coordinates, but I didn't see an increase in performance whatsoever? I did some testing with jsperf and results were virtually identical. Does this depend more on the browser?

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• New computer - AMD with which mobo? [closed]

  - by RhZ

  I need to buy new computers for the office, all running ubuntu 10.04 or 11.10, whichever works. I am looking at a asus mobo with the AMD870 northbridge and 850 sounthbridge. Can anyone tell me if that is buggy or not? And with maybe an Athlon II X4 640 processor. At home I am running an asus mobo with AMD880/SB850 at home, which is good, although the on board ATI video card was buggy, I put a nvida card in as well and its great now. But for the office I want to save cost, don't need a kick-ill system. Still, I need the machines to be fast and look good, don't want to skimp on performance. Can anyone provide me with some advice about this? I will buy a custom machine, not from one of the big manufacturers. Thanks! :-)

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• Oracle Streamlines Tracking of Global Carbon Footprint and Greenhouse Gas Emissions

  - by Evelyn Neumayr

  Oracle has automated its global carbon footprint and greenhouse gas emissions measurement using Oracle Environmental Accounting and Reporting. By using this solution, Oracle was able to increase organizational efficiency and reduce the need for labor intensive, manual processes in the tracking of greenhouse gas (GHG) emissions for both voluntary and legislated environmental reporting. The move to Oracle Environmental Accounting and Reporting enables Oracle to more effectively meet both internal and governmental reporting needs, while addressing the associated economic mandates for reporting emissions and sustainability efforts. Organizations across the company can now record environmental data such as energy consumed or energy generated at facilities or locations within the enterprise, and can automatically calculate corresponding GHG emissions resulting from the use of emission sources. In addition, Oracle Environmental Accounting and Reporting includes data integration from multiple applications to ensure proper representation and calculation of emissions across the globe. The result is access to fast, accurate data and reporting to help the company meet its sustainability goals.

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• Has an open console any chance to give more strength to the indie game world ?

  - by jokoon

  I have heard about the GPX, but i don't really think the embedded market is mature enough in terms of performance, but what about the home console market ? I'm not talking about last-generation graphics, because that would be economically impossible, but what about an hardware as fast as a playstation 2/Xbox 1/Gamecube ? For games, the trick would be to ask some editors to recompile their best sellers for the new machine: those games being from the PSX age or even older console generations, I think this would have a very low cost job and they could still make some good profit, but I need to know if this is doable technically, considering the architecture which can be quite exotic. Do you think it would be a viable project to talk about to investors ?

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• jQuery/AJAX on old Computers/Browsers

  - by Andresch Serj

  I am working on a plattform that will have a lot of users in the so called "developing countries". So many of them will be using old computers and old browsers in tiny internet cafes. We want to make sure to give them a good user Experience and make sure the website loads as fast as possible. Problem is, that while you can save a lot of requeasts and time, using jQuery/AJAX, it also brings along a lot of Problems: - Will the Computers be powerfull enough to deal with the client side scripts? - Will the old Browsers handle jQuery? Does anyone have any experience with these sort of problems or might know of some sort of article on the topic?

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• Google I/O 2012 - Breaking the JavaScript Speed Limit with V8

  Google I/O 2012 - Breaking the JavaScript Speed Limit with V8 Daniel Clifford Are you are interested in making JavaScript run blazingly fast in Chrome? This talk takes a look under the hood in V8 to help you identify how to optimize your JavaScript code. We'll show you how to leverage V8's sampling profiler to eliminate performance bottlenecks and optimize JavaScript programs, and we'll expose how V8 uses hidden classes and runtime type feedback to generate efficient JIT code. Attendees will leave the session with solid optimization guidelines for their JavaScript app and a good understanding on how to best use performance tools and JavaScript idioms to maximize the performance of their application with V8. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 3049 113 ratings Time: 47:35 More in Science & Technology

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• Sorting a REALLY BIG delimited text file in UNIX / VMS [closed]

  - by gunbuster363

  Hi everyone, I am going to sort a REALLY BIG delimited text file, say 250Mb (or a bunch of files of more or less than 250Mb) . It have 37 fields, and I need to sort it by 5 fields, for example 1st, 4th, 5th, 6th 7th fields. Under Unix / VMS, do I have a good option to do this FAST? I can write COBOL program. Now I am trying to sort them using the below command, but it already run for a long time and just not going to finished. Thank you. The command I used: time sort -t ',' -o sorted.txt +0 -1 +4 -5 +5 -6 +6 -7 +22 -23 *.DAT_gprscdr_ftpd

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• 2D Smooth Turning in a Tile-Based Game

  - by ApoorvaJ

  I am working on a 2D top-view grid-based game. A ball that rolls on the grid made up of different tiles. The tiles interact with the ball in a variety of ways. I am having difficulty cleanly implementing the turning tile. The image below represents a single tile in the grid, which turns the ball by a right angle. If the ball rolls in from the bottom, it smoothly changes direction and rolls to the right. If it rolls in from the right, it is turned smoothly to the bottom. If the ball rolls in from top or left, its trajectory remains unchanged by the tile. The tile shouldn't change the magnitude of the velocity of the ball - only change its direction. The ball has Velocity and Position vectors, and the tile has Position and Dimension vectors. I have already implemented this, but the code is messy and buggy. What is an elegant way to achieve this, preferably by modification of the ball's Velocity vector by a formula?

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• Review before or after code commit, which is better?

  - by fifth

  Traditionally we performed code review before commit, I had an argument with my colleague today, who preferred code review after commit. First, here's some background, we got some experienced developers and we also got new hires with almost zero programming practice. we'd like to perform fast and short iterations to release our product. we all team members locate at same site. The advantages of code review before commit I've learned, mentor new hires try to prevent errors, failures, bad designs in early developing cycle learn from others knowledge backup if someone quits But I also got some bad experience, like low efficiency, some changes may be reviewed over days hard to balance speed and quality, especially for newbies some guy felt distrust As to post-review, I just knew little about this, but the most thing I worried about is the risk of losing control, people never review. Any opinions?

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• Google I/O 2012 - High Performance HTML5

  Google I/O 2012 - High Performance HTML5 For years we built web apps that far outpaced the capabilities of the browsers they ran in. Just as the browsers were catching up HTML5 came on the scene - video and audio, canvas, SVG, app cache, localStorage, @font-face, and more. Now the browsers are racing to stay ahead of the wave that's building as developers adopt these new capabilities. Is your HTML5 app going to ride the wave or be dashed on the rocks leaving users stranded? Learn which HTML5 features to seek out and which to avoid when it comes to building fast HTML5 web apps. This session will be live captioned. From: GoogleDevelopers Views: 91 1 ratings Time: 01:02:07 More in Science & Technology

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• Ubuntu Gnome 14.04 - 100% CPU usage alternating between cores

  - by AwDeOh

  I've noticed my Ubuntu Gnome 14.04 has been getting a bit sluggish lately - things like Gnome Shell overview animation are jerky where they were lightning fast, Elder Scrolls Online is stuttering and dropping to low FPS where I previously had a solid 50-60 fps. Out of interest I looked at the CPU History, and when running nothing but the system monitor, I was getting this: That was 15 minutes ago. The 100% load seemed to be alternating between the cores. PC specs: i3 2130 processor. 8gb DDR3 RAM. ASUS P8-Z77M motherboard. Samsung 128gb SSD I've been trying to reproduce the problem, and while I'm not getting the 100% any more at idle, the system monitor is showing an average load of about 20-30%, that's with just Chrome and the System Monitor open. Oddly, if I touch nothing, it'll average out to about 20% - if I start moving the mouse around and do some typing, it's closer to 40%. Is this normal? Any help appreciated, I wouldn't even know where to start here..

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• Efficient way of detecting a touched object in a game?

  - by Pin

  Imagine a Sims-like 2D game for a touch based mobile phone where one can interact with virtually any object in the scene. How can I efficiently detect which object is being touched by the player? In my short experience, looping through all the visible objects in the scene and checking if they're touched has so far done the job, but when there may be many many moving objects in the screen that sounds kind of inefficient isn't it? Keeping the visible moving objects list can consume time in itself as one may have to loop through all of them each frame. Other solutions I've thought are: Spatial hashing. Divide the screen as a grid and place the visible objects in the corresponding bucket. Detection of the clicked object is fast but there's additional overhead for placing the objects in the correct bucket each frame. Maintaining a quad-tree. Moving objects have to be rearranged all the time, the previous solution looks better. What is usually done in this case?

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• Dynamic Jump spot

  - by Pasquale Sada

  I have an initial velocity V(Vx,Vy,VZ) and a spot where he stands still at S(Sx,Sy,Sz). What I'm trying to achieve is a jump on a spot E(Ex,Ey,Ez) where you have clicked on(only lower or higher spot, because I've in place a simple steering behavior for even terrains). There are no obstacle around. I've implemented a formula that can make him jump in a precise way on a spot but you need to declare an angle: the problem arise when the selected spot is straight above your head. It' pretty lame that the char hang there and can reach a thing that is 1cm above is head. I'll share the code I'm using: Vector3 dir = target - transform.position; // get target direction float h = dir.y; // get height difference dir.y = 0; // retain only the horizontal direction float dist = dir.magnitude ; // get horizontal distance float a = angle * Mathf.Deg2Rad; // convert angle to radians dir.y = dist * Mathf.Tan(a); // set dir to the elevation angle dist += h / Mathf.Tan(a); // correct for small height differences // calculate the velocity magnitude float vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 *a)); return vel * dir.normalized;

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• Channelling an explosion along a narrow passage

  - by finnw

  I am simulating explosions in a 2D maze game. If an explosion occurs in an open area, it covers a circular region (this is the easy bit.) However if an explosion occurs in a narrow passage (i.e narrower than the blast range) then it should be "compressed", so that it goes further and also it should go around corners. Ultimately, unless it is completely boxed-in, then it should cover a constant number of pixels, spreading in whatever direction is necessary to reach this total area. I have tried using a shortest-path algorithm to pick the nearest N pixels to the origin avoiding walls, but the effect is exaggerated - the blast travels around corners too easily, making U-turns even when there is a clear path in another direction. I don't know whether this is realistic or not but it is counter-intuitive to players who assume that they can hide around a corner and the blast will take the path of least resistance in a different direction. Is there a well-known (and fast) algorithm for this?

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• Do search engines crawl PDFs and if so are there any rules to follow when making them

  - by RandomBen

  The website I am working on has a few hundred PDFs in it. I don't think I have ever seen any of them come back in a search but there are linked to directly from out site. They are also full of keywords because they are product documents. Is there anything special we need to do to get Google or other search engines to crawl them? Is there any hard and fast rules for making PDFs to help Google like them more? For instance should I run them through ghostscript to clean up broken PDF tags that Adobe creates during generation?

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• Did Google Delete my index?

  - by Sei

  I have a website that I haven't had much time to take care of. I updated it 4 times since last October, the contents are all original and informative. I can see those cache from Way back Machine and the site was indexed in Yahoo, but not in google. Did I get my index on Google deleted because I did not update it often? Normally Google crawl often and index fast, I just got really worried if I did something wrong. Is it possible that I set something wrong in the hosting or something? Please help me

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• Finding inspiration / help for making up (weapon) names

  - by Rookie

  I'm really bad with words, especially with English words. Currently I'm struggling to make a good weapon names for my game, it needs to display the weapon functionality (weak/strong/fast/ballistic etc) correctly as well. For example the best weapon in a (futuristic) game cannot be called just with the name "Laser", it's just too boring, right? Are there any tools, websites or anything that helps me finding good names for weapons? (or anything else similar). I was thinking to use scientific names, but noticed that they are really hard to write, and they get very long, and I also lack information about science, I only know I could use the atomic sub-particles names in the weapons for example. How do I get started with becoming good with making up names? (this could apply in generally to any naming problems).

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• What are good ways to find collaborators for a coding weekend?

  - by tarrasch

  Not sure if this belongs here, feel free to push it somewhere else if needed. When i was at university we would sometimes come together into a room full of beer and fast food and crank out software in a weekend. Unfortunately the group has kind of split up and its just not possible any more. My question is now: Where can i find like-minded people on the Internet that would like to do something like this? I have an idea what i wanted to do next, but of course other people have ideas too.

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• Google I/O 2012 - Crunching Big Data with BigQuery

  Google I/O 2012 - Crunching Big Data with BigQuery Jordan Tigani, Ryan Boyd Google BigQuery is a data analysis tool born from Google internal technologies. It enables developers to analyze terabyte data sets in seconds using a RESTful API. This session will dive into best practices for getting fast answers to business questions. We'll provide insight into how we process queries under the hood and how to construct SQL queries for complex analysis. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1 0 ratings Time: 01:03:04 More in Science & Technology

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• Looking for the better way to combine deep architecture refactoring with feature based development

  - by voroninp

  Problem statement: Given: TFS as Source Control Heavy desktop client application with tons of legacy code with bad or almost absent architecture design. Clients constantly requiring new features with sound quality, fast delivery and constantly complaining on user unfriendly UI. Problem: Application undoubtedly requires deep refactoring. This process inevitably makes application unstable and dedicated stabilization phase is needed. We've tried: Refactoring in master with periodical merges from master (MB) to feature branch (FB). (my mistake) Result: Many unstable branches. What we are advised: Create additional branch for refactoring (RB) periodically synchronizing it with MB via merge from MB to RB. After RB is stabilized we substitute master with RB and create new branch for further refactoring. This is the plan. But here I expect the real hell of merging MB to RB after merging any FB to MB. The main advantage: Stable master most of the time. Are there any better alternatives to the procees?

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• Whats the Quickest and Cheapest Solution to setup a Affiliate Program for an Online Product?

  - by szahn

  I have a simple HTML landing page setup for an online product I want to sell. This product is a hardcover book. I want to be able to allow other people to setup their own landing pages and make a percentage of the sale from their site. What are some good payment processors or payment gateways that make setting up an affiliate system easy and fast? Clarification - When someone purchases an item, I want (whatever the payment processor is) to automatically route a percentage of that payment to the affiliate and the rest to the original author.) Are there any payment frameworks that already do this? I've found a few sites that let you do this, but they seem to restrict you to digital purchases only. However, my sites is selling a ship-able product and the affiliate system needs to support this.

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• How to get mixer applet for "Built-in Audio Analog Stereo"

  - by gerrit

  In pavucontrol, I can choose between RV620 HDMI Audio [Radeon HD 3400 Series] and Built-in Audio. When the former is enabled, videos on (among others) Youtube play way too fast, but this answer solved my problem (though I don't know why). However, when I use Built-in Audio instead of RV620 HDMI Audio [Radeon HD 3400 Series], the mixer in my applet appears to be disabled; the icon is replaced by a blank and changing the volume has no effect, as the applet apparently only relays to RV620 HDMI Audio [Radeon HD 3400 Series]. How do I get an applet to control the volume for Built-in Audio instead?

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• Battery Power when running Ubuntu 14.04 LTS in dual boot

  - by Amro A.

  This is only a general question in order for me to get a better idea of my dual boot (windows 8 & Ubuntu) systems. I noticed that every time I run Ubuntu (which is becoming more often) the battery power gets consumed really fast. I am not performing any special tasks at the moment, just getting to know the system, for example, sound settings, watching videos, surfing the net and so on. When I do the same thing in Windows 8 the battery lives a considerable amount of time longer. Is this something to do with Ubuntu or is it because of the dual boot that I have going on? In other words, if I start running Ubuntu all by itself on my laptop, will it be more power consuming than Windows 8?

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• Why is my ruby application running faster the second time?

  - by Omega

  I'm creating a Ruby game using the Gosu framework. All good. Sometimes, when I run the game, it has some kind of slow startup, and probably it will be rather slow during the whole game. So I close it and... open it again. It is very likely that it will startup quickly and the whole game will run smoothly and fast. Why is that? What is this phenomenon? Is it faster because of some cache stored or whatever since the first run? (But why would cache be stored? If the app dies, I would expect no references at all etc...) Ruby, Windows 7.

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