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  • Maximizing the number of true concurrent / parrallel http requests in Silverlight

    - by Clems
    Hi all. I'm using SL 4 beta and my app needs to do a lot of small http requests to the server. I believe that when exceeding the number of allowed concurrent requests, the subsequent requests are put in a queue. I am also aware that SL 4 has both a http browser stack and a http client stack, with both different limit in terms of the number of concurrent requests. Let's say call those limits MAX_BROWSER and MAX_CLIENT. Also I think I read somewhere that the number of concurrent requests is limited per domain, not overall. But I'm sure if this applies to both the http client stack. That means that you CAN have MAX_BROWSER requests to domain1.com AND MAX_BROWSER requests to domain2.com at the same time. And I even believe that sub domains are considered different so you can also have MAX_BROWSER requests to domain1.com AND MAX_BROWSER requests to sub.domain1.com at the same time. I have ownership of the services and domain names so I could easily setup sub domains for my services. Given those considerations I'm trying to optimize the number of concurrent http requests to my server. Here are few questions ? Is is possible to use both stack at the same time ? Is the subdomain/domain story true for both stacks ? None ? If so that would mean that I could potentially have a number of concurrent requests equal to : (MAX_BROWSER + MAX_CLIENT) * NUMBER_OF_DOMAINS which would be fairly good. Is this correct ? I'm kind of sharing my morning thoughts here, hoping somebody has experimented with those things. Thank you.

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  • Probability Random Number Generator

    - by Excl
    Let's say I'm writing a simple luck game - each player presses Enter and the game assign him a random number between 1-6. Just like a cube. At the end of the game, the player with the highest number wins. Now, let's say I'm a cheater. I want to write the game so player #1 (which will be me) has a probability of 90% to get six, and 2% to get each of the rest numbers (1, 2, 3, 4, 5). So, how can I generate a number random, and set the probability for each number? Thanks.

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  • Need a regular expression for an Irish phone number

    - by Eoghan O'Brien
    I need to validate an Irish phone number but I don't want to make it too user unfriendly, many people are used to writing there phone number with brackets wrapping their area code followed by 5 to 7 digits for their number, some add spaces between the area code or mobile operator. The format of Irish landline numbers is an area code of between 1 and 4 digits and a number of between 5 to 8 digits. e.g. (021) 9876543 (01)9876543 01 9876543 (0402)39385 I'm looking for a regular expression for Javascript/PHP. Thanks.

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  • Determine phone number based on time zone?

    - by Zachary Burt
    I have a (potentially international) phone number. It may or may not have a country code prefix. Does anyone know of a database that will help me map phone number = time zone? I would even just like to map phone number = country, since I can probably create country = time zone by scraping existing data on the web. This is a more complicated problem than it looks; for example, how do I know if it's a US-based number -- e.g. is it a USA area code, or an international country calling code? Any language is fine; I can port it.

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  • What is proper way to detect all available serial ports on Windows?

    - by Sorin Sbarnea
    There are several ways to list serial ports under Windows but I'm not sure what is the proper way: the way that does detect all serial ports that are available. One good code example is http://www.naughter.com/enumser.html - where there at 9 (nine!) ways of enumerating serial devices. The question is: what is the optimal way of doing it. Requirements: * to not open ports in order to check if they are available. * to be able to detect ports with different names than COMx.

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  • Need in obtaining a specific local telephone number [closed]

    - by Brett
    I am wanting a local phone number that I like. I have found one that I like. When I call the number that I want it says "this number has not been allocated" I have looked up and found the company that owns that number. How do I go about acquiring that number from the company. I spoke with someone who sells major phone packages and he said that if I signed up with them he could get the number for me. He said that there is a change of ownership form that the send to get the number. So I know it can be done. I am hoping that someone with industry specific knowledge in this area can guide me in getting this number.

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  • Finding a prime number after a given number

    - by avd
    How can I find the least prime number greater than a given number? For example, given 4, I need 5; given 7, I need 11. I would like to know some ideas on best algorithms to do this. One method that I thought of was generate primes numbers through the Sieve of Eratosthenes, and then find the prime after the given number.

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  • PCI-e SEALEVEL dual serial card not recognized on Ubuntu 14.04

    - by kwhunter
    New to Ubuntu, running 14.04. I have trouble with the serial port setup, I have a plug-in PCI-e SEALEVEL dual serial card that is not recognized. user1@WSIWORKSTATION2:~$ dmesg | grep tty [ 0.000000] console [tty0] enabled [ 1.577197] 00:06: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A [ 1.943326] tty ttyprintk: hash matches [ 17.240880] ttyS4: LSR safety check engaged! [ 17.241589] ttyS4: LSR safety check engaged! [ 17.242354] ttyS5: LSR safety check engaged! [ 17.243058] ttyS5: LSR safety check engaged! [ 17.243918] ttyS6: LSR safety check engaged! [ 17.244485] ttyS6: LSR safety check engaged! [ 17.245195] ttyS7: LSR safety check engaged! [ 17.245830] ttyS7: LSR safety check engaged! [ 17.246554] ttyS8: LSR safety check engaged! [ 17.247191] ttyS8: LSR safety check engaged! user1@WSIWORKSTATION2:~/Desktop/seacom$ lspci -d 135e: -vvv 02:04.0 Bridge: Sealevel Systems Inc Device e205 (rev aa) Subsystem: Sealevel Systems Inc Device e205 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium TAbort- SERR- Capabilities: However, the manufacturer's drivers won't install: 1. user1@WSIWORKSTATION2:~/Desktop/seacom$ make install ---------------------------------------------------------------- Installing seacom suite. ---------------------------------------------------------------- --Installing utilities-- /usr/bin/ld: skipping incompatible ../../lib/libftd2xx.a when searching for -lftd2xx /usr/bin/ld: cannot find -lftd2xx collect2: error: ld returned 1 exit status make[2]: *** [setusb] Error 1 make[1]: *** [install] Error 1 make: *** [install] Error 1 2. user1@WSIWORKSTATION2:~/Desktop/seaio$ make install ---------------------------------------------------------------- Installing SD suite. ---------------------------------------------------------------- *Compiling SeaIO Library source file: digitalIoDevice.cpp gcc: error trying to exec 'cc1plus': execvp: No such file or directory make[1]: *** [digitalIoDevice.o] Error 1 make: *** [install] Error 1 I was not able to find a solution, so if anyone can help it will be much appreciated. PS Have some troubles with formatting my post, apologies...

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  • Are there any libraries for parsing "number expressions" like 1,2-9,33- in Java

    - by mihi
    Hi, I don't think it is hard, just tedious to write: Some small free (as in beer) library where I can put in a String like 1,2-9,33- and it can tell me whether a given number matches that expression. Just like most programs have in their print range dialogs. Special functions for matching odd or even numbers only, or matching every number that is 2 mod 5 (or something like that) would be nice, but not needed. The only operation I have to perform on this list is whether the range contains a given (nonnegative) integer value; more operations like max/min value (if they exist) or an iterator would be nice, of course. What would be needed that it does not occupy lots of RAM if anyone enters 1-10000000 but the only number I will ever query is 12345 :-) (To implement it, I would parse a list into several (min/max/value/mod) pairs, like 1,10,0,1 for 1-10 or 11,33,1,2 for 1-33odd, or 12,62,2,10 for 12-62/10 (i. e. 12, 22, 32, ..., 62) and then check each number for all the intervals. Open intervals by using Integer.MaxValue etc. If there are no libs, any ideas to do it better/more efficient?)

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  • How to generate unique serial number of machine in Delphi?

    - by noxwow
    Hi, I have question how to generate unique serial number of machine in Delphi? I tried to do this using the ID the motherboard or processor, but unfortunately it's unfortunately supported. Partition serial numbers, etc. fall off, because it is changing after the formatted. I'm looking for something that doesn't change after the formatted. Has anyone any idea?

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  • Connecting to a switch?

    - by Kravlin
    I have a managed switch that i liberated from our school's surplus goods store for $10 that has a serial based console. I have a serial cable and a computer with a serial port, but i have no idea what protocal to use to connect between the two. I'm running Arch Linux on the computer with the serial port. Thanks

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  • How to clear a zone from a broken Bind/Named server

    - by Cerin
    I tried adding a new zone for "mydomain4.com" to my Named DNS server. However, when I went to restart it, I received the unhelpful error message: Error in named configuration: zone mydomain4.com/IN: loaded serial 3 zone mydomain3.com/IN: loaded serial 2 zone mydomain2.com/IN: loaded serial 2 zone mydomain1.com/IN: loaded serial 2 zone mydomain0.com/IN: loaded serial 6 zone localhost.localdomain/IN: loaded serial 0 zone localhost/IN: loaded serial 0 zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0 zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0 zone 0.in-addr.arpa/IN: loaded serial 0 zone mydomain/IN: loaded serial 2010092201 dns_rdata_fromtext: db.10.157.10:27: near '*.mydomain4.com.': bad name (check-names) zone 10.157.10.in-addr.arpa/IN: loading from master file db.10.157.10 failed: bad name (check-names) zone 10.157.10.in-addr.arpa/IN: not loaded due to errors. _default/10.157.10.in-addr.arpa/IN: bad name (check-names) I'm confused by this, since I thought I created the new zone identically to how I created the other 4 zones. However, since I need this DNS server up, I tried deleting the new zone file at /var/named/chroot/var/named/mydomain4.com.db. However, upon trying to restart again, I received a new unhelpful error: Error in named configuration: zone mydomain4.com/IN: loading from master file mydomain4.com.db failed: file not found zone mydomain4.com/IN: not loaded due to errors. _default/mydomain4.com./IN: file not found zone mydomain3.com/IN: loaded serial 2 zone mydomain2.com/IN: loaded serial 2 zone mydomain1.com/IN: loaded serial 2 zone mydomain0.com/IN: loaded serial 6 zone localhost.localdomain/IN: loaded serial 0 zone localhost/IN: loaded serial 0 zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0 zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0 zone 0.in-addr.arpa/IN: loaded serial 0 zone mydomain/IN: loaded serial 2010092201 dns_rdata_fromtext: db.10.157.10:27: near '*.mydomain4.com.': bad name (check-names) zone 10.157.10.in-addr.arpa/IN: loading from master file db.10.157.10 failed: bad name (check-names) zone 10.157.10.in-addr.arpa/IN: not loaded due to errors. _default/10.157.10.in-addr.arpa/IN: bad name (check-names) Obviously, named still thinks the zone file is being used, but I can't find where. I've tried doing: grep -lir "mydomain4" / but it doesn't find any files containing that text. How do I purge this domain from named's configs? Also, how do I figure out what caused the original error?

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  • multi-shop orders table and sequential order numbers based on shop

    - by imanc
    Hey, I am looking at building a shop solution that needs to be scalable. Currently it retrieves 1-2000 orders on average per day across multiple country based shops (e.g. uk, us, de, dk, es etc.) but this order could be 10x this amount in two years. I am looking at either using separate country-shop databases to store the orders tables, or looking to combine all into one order table. If all orders exist in one table with a global ID (auto num) and country ID (e.g uk,de,dk etc.), each countries orders would also need to have sequential ordering. So in essence, we'd have to have a global ID and a country order ID, with the country order ID being sequential for countries only, e.g. global ID = 1000, country = UK, country order ID = 1000 global ID = 1001, country = DE, country order ID = 1000 global ID = 1002, country = DE, country order ID = 1001 global ID = 1003, country = DE, country order ID = 1002 global ID = 1004, country = UK, country order ID = 1001 THe global ID would be DB generated and not something I would need to worry about. But I am thinking that I'd have to do a query to get the current country order based ID+1 to find the next sequential number. Two things concern me about this: 1) query times when the table has potentially millions of rows of data and I'm doing a read before a write, 2) the potential for ID number clashes due to simultaneous writes/reads. With a MyISAM table the entire table could be locked whilst the last country order + 1 is retrieved, to prevent ID number clashes. I am wondering if anyone knows of a more elegant solution? Cheers, imanc

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  • Show a number with specified number of significant digits

    - by dreeves
    I use the following function to convert a number to a string for display purposes (don't use scientific notation, don't use a trailing dot, round as specified): (* Show Number. Convert to string w/ no trailing dot. Round to the nearest r. *) Unprotect[Round]; Round[x_,0] := x; Protect[Round]; shn[x_, r_:0] := StringReplace[ ToString@NumberForm[Round[N@x,r], ExponentFunction->(Null&)], re@"\\.$"->""] (Note that re is an alias for RegularExpression.) That's been serving me well for years. But sometimes I don't want to specify the number of digits to round to, rather I want to specify a number of significant figures. For example, 123.456 should display as 123.5 but 0.00123456 should display as 0.001235. To get really fancy, I might want to specify significant digits both before and after the decimal point. For example, I might want .789 to display as 0.8 but 789.0 to display as 789 rather than 800. Do you have a handy utility function for this sort of thing, or suggestions for generalizing my function above? Related: Suppressing a trailing "." in numerical output from Mathematica

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  • Setting serial RS232 port settings; any in C# alternatives to SerialPort class ?

    - by adrin
    In my .NET application I need to achieve serial port setup equivalent to this C++ managed code: ::SetCommMask(m_hCOMM, EV_RXCHAR); ::SetupComm(m_hCOMM, 9*2*128*10, 400); ::PurgeComm(m_hCOMM, PURGE_TXABORT|PURGE_RXABORT|PURGE_TXCLEAR|PURGE_RXCLEAR); COMMTIMEOUTS timeOut; timeOut.ReadIntervalTimeout = 3; timeOut.ReadTotalTimeoutConstant = 3; timeOut.ReadTotalTimeoutMultiplier = 1; timeOut.WriteTotalTimeoutConstant = 0; timeOut.WriteTotalTimeoutMultiplier= 0; int nRet= ::SetCommTimeouts(m_hCOMM, &timeOut); ::EscapeCommFunction(m_hCOMM, SETDTR); ::EscapeCommFunction(m_hCOMM, SETRTS); DCB dcb; memset(&dcb, 0, sizeof(DCB)); dcb.BaudRate= m_nSpeed; dcb.ByteSize= 8; dcb.fParity = FALSE; dcb.Parity = NOPARITY; dcb.StopBits= ONESTOPBIT; dcb.fBinary = TRUE; dcb.fDsrSensitivity= FALSE; dcb.fOutxDsrFlow= FALSE; dcb.fOutxCtsFlow= FALSE; dcb.fDtrControl = DTR_CONTROL_HANDSHAKE; dcb.fRtsControl = RTS_CONTROL_TOGGLE; nRet= ::SetCommState(m_hCOMM, &dcb); Is it possible at all? How do I approach this problem? Are there any (preferable free) libraries that allow such low level serial port control or should I create my own wrapper on top of Win32 api? Anyone did anything similar or has an idea how to 'glue' win32 serial port api with .net so that I can use neat .NET DataReceived() events ? Or maybe I can create .NET SerialPort instance and then modify it using managed API?

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  • How do you send an extended-ascii AT-command (CCh) from Android bluetooth to a serial device?

    - by softex
    This one really has me banging my head. I'm sending alphanumeric data from an Android app, through the BluetoothChatService, to a serial bluetooth adaptor connected to the serial input of a radio transceiver. Everything works fine except when I try to configure the radio on-the-fly with its AT-commands. The AT+++ (enter command mode) is received OK, but the problem comes with the extended-ascii characters in the next two commands: Changing the radio destination address (which is what I'm trying to do) requires CCh 10h (plus 3 hex radio address bytes), and exiting the command mode requires CCh ATO. I know the radio can be configured OK because I've done it on an earlier prototype with the serial commands from PIC basic, and it also can be configured by entering the commands directly from hyperterm. Both these methods somehow convert that pesky CCh into a form the radio understands. I've have tried just about everything an Android noob could possibly come up with to finagle the encoding such as: private void command_address() { byte[] addrArray = {(byte) 0xCC, 16, 36, 65, 21, 13}; CharSequence addrvalues = EncodingUtils.getString(addrArray, "UTF-8"); sendMessage((String) addrvalues); } but no matter what, I can't seem to get that high-order byte (CCh/204/-52) to behave as it should. All other (< 127) bytes, command or data, transmit with no problem. Any help here would be greatly appreciated. -Dave

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  • Biased Random Number Generator

    - by cmptrer
    I am looking for a random number generator that can be biased. For instance, say I want a random number between 1-5, with the probability being: 1: Comes up 20% of the time 2: Comes up 10% of the time 3: Comes up 40% of the time 4: Comes up 25% of the time 5: Comes up 5% of the time Is there anything in the standard library, or other libraries out there that would do this? Alternatively, is there an efficient way to do this myself?

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  • How would I create a random number?

    - by Elliot Bonneville
    How would I create a random number using C++? I've heard that one should use the time as a seed, but I'm not sure how to do that with the correct syntax. How would I do this? One more thing - how would I limit the random number to a particular range? I'm simulating a dice roll and getting numbers in the millions...

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