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• When using grep from VIM, how to jump to results?

  - by Marplesoft

  When using the grep plugin to VIM, I can search the current directory for all occurrences of a string within a set of files, like this: :grep Ryan *.txt This outputs something like this: file1.txt:3:Ryan was here file2.txt:10:Ryan likes VIM file3.txt:5:superuser.com is a fav of Ryan (1 of 3): Ryan was here Press ENTER or type command to continue If I press enter, it just takes me back to my editor. What I really want to do is be able to open up one of those files and jump to the place where the string was found. Is there a way to do this? The 1 of 3 part makes me think there's a way to tab through the results, but I don't know what commands are available to me. Can anybody shed some light on this?

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• How can I get my home machines to connect to each other via hostname?

  - by Marplesoft

  I've got a standard Linksys router and a few laptops - mix of Windows Vista and Mac OS X. Shouldn't my router act as a DNS server to resolve hostnames for the machines within my local network? If not, how else can I solve this? Static hosts files? Other solutions?

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• How can people still be getting spam from a hotmail account that's been closed?

  - by Marplesoft

  My wife had an old hotmail account which she recently closed. Some people that she used to communicate with from that account have recently been receiving spam emails from this account. I don't see how this is possible because the account is closed. I considered that maybe the email address is being spoofed, is there a way I can tell from looking at the email headers or something? Or should I take this up with hotmail?

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• How to access the Principal from a Java service object without using FlexContext?

  - by Marplesoft

  We're building some Java objects that are exposed via BlazeDS to our flex client application. So basically the BlazeDS messagebroker servlet instantiates and invokes methods on these objects in response to client requests. Works great. We're using app server-based authentication and have set up a security constraint on the <destination> elements in the remoting-config.xml file element to prevent unauthenticated clients from being able to access these remote java objects. Again, works fine. However, there are several places within the implementation of these java objects where we want to get the currently logged on user's username. Right now we are doing this via FlexContext.getUserPrincipal(), which gives access to this but we have a nagging concern that we don't like the idea that the implementation of these objects (the service layer) has a hard dependency on a BlazeDS class. But we're not sure how else to get access to this. The same applies to accessing the ServletContext and such. Any ideas?

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• What's the best way to store a MySQL database in source control?

  - by Marplesoft

  I am working on an application with a few other people and we'd like to store our MySQL database in source control. My thoughts are two have two files: one would be the create script for the tables, etc, and the other would be the inserts for our sample data. Is this a good approach? Also, what's the best way to export this information? Also, any suggestions for workflow in terms of ways to speed up the process of making changes, exporting, updating, etc.

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• Compiling a C program with a specific architecture

  - by Marplesoft

  I was recently fighting some problems trying to compile an open source library on my Mac that depended on another library and got some errors about incompatible library architectures. Can somebody explain the concept behind compiling a C program for a specific architecture? I have seen the -arch compiler flag before and have seen values passed to it such as ppc, i386 and x86_64 which I assume maps to the CPU "language", but my understanding stops there. If one program uses a particular architecture, do all libraries that it loads need to be on the same architecture as well? How can I tell what architecture a given program/process is running under?

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• How to determine code and assets size within a SWF?

  - by Marplesoft

  Is there a way to take a compiled SWF file and figure out how much of it's size is used by code and how much is assets (images, etc)? I'd like to see if I can get my Flex SWF smaller but I'm unsure what's taking up the most space.

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• What are the main benefits of implementing a virtual machine as part of an application?

  - by Marplesoft

  Several databases I've been looking at recently implement a virtual machine internally to perform the respective data reads and writes. For an example, check out this article on SQLite's virtual machine they call the 'VDBE'. I'm curious as to what the benefits of such an architecture are. I would assume performance is one but why would a virtual machine like this run faster? In fact, it seems to be that this extra layer could cause it to run slower. So perhaps it's for security? Or portability? Anyway, just curious about this.

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