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  • Fastest way to find the largest power of 10 smaller than x

    - by peoro
    Is there any fast way to find the largest power of 10 smaller than a given number? I'm using this algorithm, at the moment, but something inside myself dies anytime I see it: 10**( int( math.log10(x) ) ) # python pow( 10, (int) log10(x) ) // C I could implement simple log10 and pow functions for my problems with one loop each, but still I'm wondering if there is some bit magic for decimal numbers.

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  • How do I collect a bunch of Django abstract models in a QuerySet?

    - by Thierry Lam
    I have the following abstract Django models: class Food(models.Model): name = models.CharField(max_length=100) class Meta: abstract = True In one of my view, I created a bunch of Food model: panino = Food(name='Panino') poutine = Food(name='Poutine') food = [panino, poutine] From the above, I'm not saving the model and storing the Food model in a regular Python list. I want to store the above food models in a QuerySet object. How can I do that without storing any data to the database?

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  • Windows 7 system CPU bogged by windows services, no explanation

    - by Alex
    I'm looking at a laptop for a colleague which is running terribly slow. A quick look showed that the CPU was 100% used by 2-3 SVCHost processes, which off course doesn't tell much since those are just 'cover' processes with services running underneath them. So I fired up process explorer in hopes of finding a shady rogue service which was bogging the system, but to my suprise I found genuine MS Windows processes (or at least damn-good disguised ones) are bogging down the system: dnscache (DNS Client) IKEEXT (IKE and AuthIP IPSec Keyring modules) iphlpsvc (IP Helper) Seen separately, these processes might seem odd to be using a lot of CPU, but taking a step back one can conclude that all three services are quite closely related to networking. I've tried running: netsh int ip reset log.txt which has helped me save bizarre network-related problems in the past, but this didn't help Off course I though about a virus, but both MS Security Essentials as well as malwarebytes (let both run a full scan).

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  • appengine log console extremely slow

    - by Joey
    I am using the python app engine and finding that the log console on the local development server is terribly slow. Output to this window seems to show in chunks of about 5-15 lines every second. Is that typical? I find that it's so slow that it hinders my debugging time waiting for log data to appear.

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  • Drawbacks of using an integer as a bitfield?

    - by Mark
    I have a bunch of boolean options for things like "accepted payment types" which can include things like cash, credit card, cheque, paypal, etc. Rather than having a half dozen booleans in my DB, I can just use an integer and assign each payment method an integer, like so PAYMENT_METHODS = ( (1<<0, 'Cash'), (1<<1, 'Credit Card'), (1<<2, 'Cheque'), (1<<3, 'Other'), ) and then query the specific bit in python to retrieve the flag. I know this means the database can't index by specific flags, but are there any other drawbacks?

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  • Asus Z8NA-D6, not powering up/no signal for monitor

    - by s093294
    I have a Asus Z8NA-D6 motherboard. Been running fine so far with one E5504 Xeon processor. I have added another Xeon E5504 CPU to the second slot and it will not power up (or there is no signal to the monitor). The status lights turn on as normal. no error led. Nothing happens other then the leds start and both cpus/fans power up. HDD power up. I tried clearing CMOS. Any sugestions? http://www.asus.com/Server_Workstation/Server_Motherboards/Z8NAD6/#download Update. Removing ram for second cpu makes it boot atleast. itboots with memory pluged in for cpu 1. (2 4gb modules) when addin one more to the second cpu it still boots but bios only see the 2 blocks at cpu 1)

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  • How do I get the set of all letters in Java/Clojure?

    - by Jason Baker
    In Python, I can do this: >>> import string >>> string.letters 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' Is there any way to do something similar in Clojure (apart from copying and pasting the above characters somewhere)? I looked through both the Clojure standard library and the java standard library and couldn't find it.

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  • Looking for a VPN server that fits my needs

    - by BCS
    This question (and some more research) has revealed that OpenVPN isn't for me. So, what are my other options? In particular things I need/want (most important first) are: A server daemon that runs on Linux without kernel modules Clients work from behind NATs and Firewalls. Free/FOSS Support for PPTP, L2TP or L2TP/IPSec PSK/CRT A architecture that makes all accesses equal: if the server is to have access to the VPN, then it must be a client. Just like everyone else. Minimal configuration/state. The first 3 are must haves and the last is a nice to have. The rest I could live without, but then again I could also live with nothing.

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  • How to delete previous revisions with svn?

    - by apache
    I want to clear all all previous revisions and leave only the current revision. Is there a way to do this? I don't find a possible command to do this: [secret@vps303 ~]# svnadmin --help general usage: svnadmin SUBCOMMAND REPOS_PATH [ARGS & OPTIONS ...] Type 'svnadmin help <subcommand>' for help on a specific subcommand. Type 'svnadmin --version' to see the program version and FS modules. Available subcommands: crashtest create deltify dump help (?, h) hotcopy list-dblogs list-unused-dblogs load lslocks lstxns pack recover rmlocks rmtxns setlog setrevprop setuuid upgrade verify

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  • replacing a path with sed

    - by compie
    How can I use sed to replace this line char * path_list_[1] = { "/some/random/path" }; with this line char * path_list_[2] = { "lib/foo", "lib/bar" }; in a file named source.c Notes: * The path is really random. * Your solution should only change this line in source.c * I'm only interested in a sed oneliner. You can use this Python regex as a starting point: text = re.sub('static const char \* path_list_\[1\] = \{ "[^"]*" \};', 'static const char * path_list_[2] = { "lib/sun", "lib/matlab" };', text)

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  • In need of a good MATLAB class tutorial

    - by rlbond
    I'm having a lot of trouble trying to figure out how to use classes in MATLAB. I'm very familiar with C++ and Python but I just can't figure anything out about how to define classes in MATLAB. Does anyone know a very good resource with lots of examples? The official documentation leaves much to be desired.

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  • Postgres turn on log_statement programmatically

    - by rwallace
    I want to turn on logging of all SQL statements that modify the database. I could get that on my own machine by setting the log_statement flag in the configuration file, but it needs to be enabled on the user's machine. How do you enable it from program code? (I'm using Python with psycopg2 if it matters.)

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  • Go - Raise an exception

    - by nevalu
    I would want to raise an exception as it's made in Python or Java --to finish the program with an error message--. An error message could be returned to a parent function: func readFile(filename string) (content string, err os.Error) { content, err := ioutil.ReadFile(filename) if err != nil { return "", os.ErrorString("read " + filename + ": " + err) } return string(content), nil } but I want that it can be finished when the error is found. Would be correct the next one? func readFile(filename string) (content string) { content, err := ioutil.ReadFile(filename) defer func() { if err != nil { panic(err) } }() return string(content) }

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  • How can I enable encryption for SQLite3 in PHP5.3?

    - by meouw
    The php manual for SQLite3::open has this information: public bool SQLite3::open ( string $filename [, int $flags = SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE [, string $encryption_key ]] ) Opens an SQLite 3 Database. If the build includes encryption, then it will attempt to use the key. I would like to use encrypted SQLite databases for a project I'm working on, but I can't find any information anywhere on how to build the SQLite module including encryption. Does anyone know how to do this? Perhaps it's so obvious no one has published any information or perhaps only commercial modules are available. I've noticed that the developers of SQLite offer a proprietary encryption extension. Is this the only way to go?

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  • In django, how can I include some default records in my models.py?

    - by kdt
    If I have a models.py like class WidgetType(models.Model): name = models.CharField(max_length=200) class Widget(models.Model): typeid = models.ForeignKey(WidgetType) data = models.CharField(max_length=200) How can I build in a set of built in constant values for WidgetType when I know I'm only going to have a certain few types of widget? Clearly I could fire up my admin interface and add them by hand, but I'd like to simplify configuration by having it built into the python.

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  • How to install php cli with pnctl alongside Zend Server

    - by fazy
    I have Zend Server CE 5.6 with PHP 5.2 running on Ubuntu 11.10. Now the need has arisen to run a command line PHP script that uses PHP's pnctl functionality. First of all, I had no PHP command line in my path, so I made a symlink from the Zend one: sudo ln -s /usr/local/zend/bin/php /usr/bin However, when I run my script, I now get this error: PHP Fatal error: Call to undefined function pcntl_fork() The Zend web control panel doesn't offer pnctl in the list of modules, so how do I get this functionality? Is it safe to use apt-get to install PHP directly, to run alongside the Zend instance? If so, how do I make sure I get version 5.2? I guess the following would pull in PHP 5.3: apt-get php5-cli I could probably muddle through but any pointers to help me avoid making a mess would be much appreciated!

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  • How to empty a project created by svnadmin create /svnroot ?

    - by apache
    I want to clear all files checked into the repository /svnroot Is there a way to do this? I don't find a possible command to do this: [secret@vps303 ~]# svnadmin --help general usage: svnadmin SUBCOMMAND REPOS_PATH [ARGS & OPTIONS ...] Type 'svnadmin help <subcommand>' for help on a specific subcommand. Type 'svnadmin --version' to see the program version and FS modules. Available subcommands: crashtest create deltify dump help (?, h) hotcopy list-dblogs list-unused-dblogs load lslocks lstxns pack recover rmlocks rmtxns setlog setrevprop setuuid upgrade verify

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  • Programming introduction book

    - by Avi
    Hello there, I've offered an out-of-job girl to help her study programming (with an MCSD as the ultimate goal) - and she has no progrmming knowledge. The idea is that she'll study from books and I"ll help. Help- I need a gentle introduction to programming book, very easy, very practical, very hands-on and up to date. Optimally would be for the .Net 4.0 MS enviornment (C#,Visual Basic) but other alternaitves (Jave, Python etc.) are OK.

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