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  • Is there any difference between null and 0 when assigning to pointers in unsafe code?

    - by Eloff
    This may seem odd, but in C (size_t)(void*)0 == 0 is not guaranteed by the language spec. Compilers are allowed to use any value they want for null (although they almost always use 0.) In C#, you can assign null or (T*)0 to a pointer in unsafe code. Is there any difference? (long)(void*)0 == 0 (guaranteed or not? put another way: IntPtr.Zero.ToInt64() == 0) MSDN has this to say about IntPtr.Zero: "The value of this field is not equivalent to null." Well if you want to be compatible with C code, that makes a lot of sense - it'd be worthless for interop if it didn't convert to a C null pointer. But I want to know if IntPtr.Zero.ToInt64() == 0 which may be possible, even if internally IntPtr.Zero is some other value (the CLR may or may not convert null to 0 in the cast operation) Not a duplicate of this question

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  • Open Garmin GPI files in Linux

    - by zero
    i have several files that are in the Garmin GPI format, from here, and want to access them in Linux. How can I do that? hello dear renan - well i found the solution - so thanks for your try to add some sense to the question. GEREAT work - and here we have the answer: i will Install gpsbabel to convert the stuff. The gpi.files are just xml files, You can - after converting with gpsbabel read them as a human being.

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  • Enum values doubts?

    - by maddy
    Hi all, Is there any possible way to do any arithmetic operations on enum values enum Type{Zero=0,One,Two,Three,Four,Five,Six,Seven,Eight,Nine}; main() { enum Type Var = Zero; for(int i=0;i<10;i++) { switch(Var) { case Zero: /*do something*/ case One: /*Do something*/ ..... } Var++;(I know that this increment is not possible,But is there anyway by which we can have this variable named Var increment. regards maddy

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  • QueryReadStore loads JSON into DataGrid, but JsonRestStore does not (from the same source)

    - by labratmatt
    I'm building a Dojo DataGrid from JSON data provided by my REST interface. The DataGrid loads the data fine using a QueryReadStore, but doesn't seem to work with the same same data piped into a JsonRestStore. I'm using the following Dojo libs with Dojo 1.4.1: dojo.require("dojox.data.JsonRestStore"); dojo.require("dojox.grid.DataGrid"); dojo.require("dojox.data.QueryReadStore"); dojo.require("dojo.parser"); I declare my stores in the following manner: var storeJRS = new dojox.data.JsonRestStore({target:"api/collaborations.php/1", idAttribute: 'items[].id'}); var storeQRS = new dojox.data.QueryReadStore({url:"api/collaborations.php/1", requestMethod:"get"}); I create my grid layout like this: var gridLayout = [ new dojox.grid.cells.RowIndex({ name: "Row #", width: 5, styles: "text-align: left;" }), { name: "Name", field: "name", styles: "text-align:right;", width:20 }, { name: "Description", field: "description", width:30 } ]; I create my DataGrid as follows: The above works, but if I use QueryReadStore as my store, the grid is created with the headers (Name, Description), but it isn't populated with any rows: <div dojoType="dojox.grid.DataGrid" jsid="grid3" store="storeQRS" structure="gridLayout" style="height:500px; width:1000px;"></div> Using FireBug, I can see that QueryReadStore is getting my JSON data from my REST interface. It looks like the following: {"numRows":6,"items":[{"name":"My Super Cool Collab","description":"This is for all the super cool people in the super cool group","id":1},{"name":"My Other Super Cool","description":"This is for all the other super cool people","id":3},{"name":"This is another coll","description":"This is just some other collab","id":4},{"name":"some new collab","description":"this is a new collab","id":5},{"name":"yet another new coll","description":"uh huh","id":6},{"name":"asdf","description":"asdf","id":7}]} Any ideas? Thanks.

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  • pretty print makefiles

    - by wickedchicken
    The linux kernel (and various other projects including git) have very nice makefiles that hide the giant cc calls into nice little acronyms. For example: gcc -O2 -o cool.o cool.c -llib gcc -O2 -o neat.o neat.c -llib would become: CC cool.c CC neat.c Which is really nice if you have a project with a large number of files and long compiler flags. I recall that this had to do with suppressing the default output and making a custom one. How do you do it?

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  • Can I install SQL Server 2008 R2 on a Windows Server 2008 R2 Standard machine in a workgroup then join the server to a domain?

    - by Zero Subnet
    I have a Windows 2008 Server Standard x64 machine that I need to install SQL Server 2008 R2 Standard on then ship it to a different site where it will be joined to a Active Directory domain. The server is now using the default "WORKGROUP" workgroup and i need to know if i can install SQL Server on it then ship it to the other site where it will be joined to the domain without issues. What are the possible problems that could happen? are there any workarounds?

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  • adress-chunk: separate data stored in one collumn - into three (street, postal-code, town)

    - by zero
    hello dear community. Hello dear friends form all over the planet first of all - this is a great great forum. I like this place to share the ideas. It is so great to see such a supportive place - featuring the knowledge exchange! today i have the following thing to discuss: i want to separate the following data that are stored in one column of a calc-spreadsheet: See the following data: You see that there are the following categories:_ steet, postal-code, town All the data are stored in only one Colum; Well to be honest: i want to separate them into three colums steet, postal-code, town see the data: what can i do? note - you see that there are commas inbetween the enties: and besides this we see that we have a postal-code with four digits: that is a good thing. Perhaps we can use this as a marker that helps us to separate the data?! Perhaps See a data-sample! Here you can see some exceptions: eg. the town that has two words combinde with a "-" ... or somethims without any signs and characters... see the following... as an example: Max-Bader-Platz 1, 5620 Schwarzach im Pongau Pestalozzistraße 4, 9990 Nussdorf-Debant Schulstraße 4, 5162 Obertrum am See But i guess that this means no problem... What do you think about this? I am very very interested to get your opinion! i look forward to hear from you! regards see a snipped of the dataset - that is stored in one column -[b]Goal: [/b]i want to separate the datas into three collumns... : Schulweg 6, 9871 Seeboden Khevenhüllerstraße 45, 4861 Schörfling Franz Xaver Rennstr.18, 6460 Imst Schulstraße 4, 5162 Obertrum am See Schulweg 6, 7432 Oberschützen Pestalozzistraße 4, 9990 Nussdorf-Debant Niederndorf bei Kufstein 53c, 6342 Niederndorf bei Kufstein Hauptschulstraße 18, 2183 Neusiedl an der Zaya Seeweg 14, 5202 Neumarkt am Wallersee Europaplatz 1, 8820 Neumarkt in Steiermark Schulstraße 7, 4212 Neumarkt im Mühlkreis Schulstraße 20, 4720 Neumarkt im Hausruckkreis Bahnhofstr. 10, 4872 Neukirchen an der Vöckla Schulstraße 5b, 4780 Schärding Reitbergstraße 2, 4311 Schwertberg Europaplatz 1, 2320 Schwechat Am Schulberg 5, 3931 Schweiggers Waidach 8, 6130 Schwaz Waidach 8, 6130 Schwaz Max-Bader-Platz 1, 5620 Schwarzach im Pongau Markt 29, 2662 Schwarzau im Gebirge Hofsteigstraße 68, 6858 Schwarzach Gmundner Straße 7, 4690 Schwanenstadt Mühlfeldstraße 1, 4690 Schwanenstadt Mainsdorferstraße 18, 8541 Schwanberg Jakob Stemer-Weg 3, 6780 Schruns Obere Umfahrungsstraße 16, 2432 Schwadorf bei Wien Battloggstraße 54, 6780 Schruns Schloss-Straße 19, 5020 Salzburg Schillerplatz 2, 8280 Fürstenfeld Erzherzog-Johann-Str. 400, 8970 Schladming Schulgasse 261, 8811 Scheifling i look forward to hear from you!! regards

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  • Installing Ubuntu without a bootable CD

    - by Zero
    I am currently planning on installing a 64 bit version of Ubuntu. I have my partitions set up already, but my cd writer is currently out of commission. Is there anyway for me to install it without creating a bootable CD? (My computer is currently dual-booting between Vista x32 and ubuntu x32)

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  • VB.NET overloading array access?

    - by Wayne Werner
    Hi, Is it possible to overload the array/dict access operators in VB.net? For example, you can state something like: Dim mydict As New Hashtable() mydict.add("Cool guy", "Overloading is dangerous!") mydict("Cool guy") = "Overloading is cool!" And that works just fine. But what I would like to do is be able to say: mydict("Cool guy") = "3" and then have 3 automagically converted to the Integer 3. I mean, sure I can have a private member mydict.coolguy and have setCoolguy() and getCoolguy() methods, but I would prefer to be able to write it the former way if at all possible. Thanks

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  • Enrich a dataset of POIs with OpenStreetMap

    - by zero
    update: due to some hints of users - eg oliver Salzburg and slhck i have been aware of gis.stackexchange.com - so i moved the topic on my own: Plz can you or somebody who has the permission close the article - since we do not need this topic on two sites. Thx for your work. KEEP up the service here! STACK-sites rock. I have a list of POIs, some with a full description and some with only a few data entries, like the following: 6.9441000 50.9242000 [50677] (Ital) Casa di Biase [Köln] 6.9373600 50.9291800 [50674] (Ital) Al Setaccio [Köln] However, I need the full dataset. Can I get this somewhere? If I have all the position data, is it possible to find the rest? a. name of the street b. name of the town So for example, the data should finally look like this: 10.5346100 52.1613600 [38300] (Chin) Wanbao Kommissstr.9 [Wolfenbüttel] 13.2832500 52.4422600 [14167] (Ital) LaPergola Unter den Eichen 84d [Berlin] 13.3177700 52.5062900 [10625] (Chin) Good Friends Kantstr.30 [Berlin] Can I do this with OpenStreetMap? Should I parse OpenStreetMap data? Or OpenBabel?

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  • Error in Print Function in Bubble Sort MIPS?

    - by m00nbeam360
    Sorry that this is such a long block of code, but do you see any obvious syntax errors in this? I feel like the problem is that the code isn't printing correctly since the sort and swap methods were from my textbook. Please help if you can! .data save: .word 1,2,4,2,5,6 size: .word 6 .text swap: sll $t1, $a1, 2 #shift bits by 2 add $t1, $a1, $t1 #set $t1 address to v[k] lw $t0, 0($t1) #load v[k] into t1 lw $t2, 4($t1) #load v[k+1] into t1 sw $t2, 0($t1) #swap addresses sw $t0, 4($t1) #swap addresses jr $ra #return sort: addi $sp, $sp, -20 #make enough room on the stack for five registers sw $ra, 16($sp) #save the return address on the stack sw $s3, 12($sp) #save $s3 on the stack sw $s2, 8($sp) #save Ss2 on the stack sw $s1, 4($sp) #save $s1 on the stack sw $s0, 0($sp) #save $s0 on the stack move $s2, $a0 #copy the parameter $a0 into $s2 (save $a0) move $s3, $a1 #copy the parameter $a1 into $s3 (save $a1) move $s0, $zero #start of for loop, i = 0 for1tst: slt $t0, $s0, $s3 #$t0 = 0 if $s0 S $s3 (i S n) beq $t0, $zero, exit1 #go to exit1 if $s0 S $s3 (i S n) addi $s1, $s0, -1 #j - i - 1 for2tst: slti $t0, $s1, 0 #$t0 = 1 if $s1 < 0 (j < 0) bne $t0, $zero, exit2 #$t0 = 1 if $s1 < 0 (j < 0) sll $t1, $s1, 2 #$t1 = j * 4 (shift by 2 bits) add $t2, $s2, $t1 #$t2 = v + (j*4) lw $t3, 0($t2) #$t3 = v[j] lw $t4, 4($t2) #$t4 = v[j+1] slt $t0, $t4, $t3 #$t0 = 0 if $t4 S $t3 beq $t0, $zero, exit2 #go to exit2 if $t4 S $t3 move $a0, $s2 #1st parameter of swap is v(old $a0) move $a1, $s1 #2nd parameter of swap is j jal swap #swap addi $s1, $s1, -1 j for2tst #jump to test of inner loop j print exit2: addi $s0, $s0, 1 #i = i + 1 j for1tst #jump to test of outer loop exit1: lw $s0, 0($sp) #restore $s0 from stack lw $s1, 4($sp) #resture $s1 from stack lw $s2, 8($sp) #restore $s2 from stack lw $s3, 12($sp) #restore $s3 from stack lw $ra, 16($sp) #restore $ra from stack addi $sp, $sp, 20 #restore stack pointer jr $ra #return to calling routine .data space:.asciiz " " # space to insert between numbers head: .asciiz "The sorted numbers are:\n" .text print:add $t0, $zero, $a0 # starting address of array add $t1, $zero, $a1 # initialize loop counter to array size la $a0, head # load address of print heading li $v0, 4 # specify Print String service syscall # print heading out: lw $a0, 0($t0) # load fibonacci number for syscall li $v0, 1 # specify Print Integer service syscall # print fibonacci number la $a0, space # load address of spacer for syscall li $v0, 4 # specify Print String service syscall # output string addi $t0, $t0, 4 # increment address addi $t1, $t1, -1 # decrement loop counter bgtz $t1, out # repeat if not finished jr $ra # return

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  • How do calculators work with precision?

    - by zoul
    Hello! I wonder how calculators work with precision. For example the value of sin(M_PI) is not exactly zero when computed in double precision: #include <math.h> #include <stdio.h> int main() { double x = sin(M_PI); printf("%.20f\n", x); // 0.00000000000000012246 return 0; } Now I would certainly want to print zero when user enters sin(p). I can easily round somewhere on 1e–15 to make this particular case work, but that’s a hack, not a solution. When I start to round like this and the user enters something like 1e–20, they get a zero back (because of the rounding). The same thing happens when the user enters 1/10 and hits the = key repeatedly — when he reaches the rounding treshold, he gets zero. And yet some calculators return plain zero for sin(p) and at the same time they can work with expressions such as (1e–20)/10 comfortably. Where’s the trick?

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  • Chrome pop-up blocker fail?

    - by Count Zero
    I have this problem since just a few days. I've been a heavy Chrome user for several years, but it never happened before: Sometimes absolutely uncalled for pop-ups appear, when I click something absolutely legit. It seems to happen at a very precise rate of two pop-ups every hour or so. The pop-ups are not very varied, it seems to be a fixed set of some 4-5 ads. At first I thought I caught some malware, but after a full scan with Malwarebytes Anti-Malware, I found absolutely nothing. In addition the problem exists only with Chrome. When I use Firefox, this never ever happens. What is even more puzzling is that it happens on both of my rigs and started on the same day. I have a removable storage that I dock to both of them and access one machine from the other via RDP, but still... It seems this is a problem that others face too. See this Google forum and here. Could it be that the latest Chrome build is just acting up? (Just in case it matters: I run Chrome version 24.0.1312.57 m on Win 7.)

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  • Moving a Drupal between linux servers, best practice to avoid file-ownership problems

    - by zero
    I want to port over a Drupal commons 6x24 from a local LAMP-stack to a production webserver. Both systems run OpenSuse Linux. How do I do this, what are the most important steps. How should I handle file-ownership. It's important for me to have to have full control of the file ownership. If I use the wwwrun account, I frequently run into problems, due to a very strict webserver-admin. See for example the long history of looking for fixes and solutions see this thread and even more interesting see this very long and impressive thread here. All troubles I run into have to do with file-owernship and permissions. This is my current setup; Note: This was just a quick hacked installation - quick and dirty. Well my interest is after the general options i have in the port of a drupal from linux to linux linux-vi17:/srv/www/htdocs/com624 # ls -l insgesamt 224 -rwxrwxrwx 1 root www 45285 19. Jan 00:54 CHANGELOG.txt -rwxrwxrwx 1 root www 925 19. Jan 00:54 COPYRIGHT.txt -rwxrwxrwx 1 root www 206 19. Jan 00:54 cron.php drwxrwxrwx 2 root www 4096 19. Jan 00:54 includes -rwxrwxrwx 1 root www 923 19. Jan 00:54 index.php -rwxrwxrwx 1 root www 1244 19. Jan 00:54 INSTALL.mysql.txt -rwxrwxrwx 1 root www 1011 19. Jan 00:54 INSTALL.pgsql.txt -rwxrwxrwx 1 root www 47073 19. Jan 00:54 install.php -rwxrwxrwx 1 root www 15572 19. Jan 00:54 INSTALL.txt -rwxrwxrwx 1 root www 14940 19. Jan 00:54 LICENSE.txt -rwxrwxrwx 1 root www 1858 19. Jan 00:54 MAINTAINERS.txt drwxrwxrwx 3 root www 4096 19. Jan 00:54 misc drwxrwxrwx 35 root www 4096 19. Jan 00:54 modules drwxrwxrwx 4 root www 4096 19. Jan 00:54 profiles -rwxrwxrwx 1 root www 1470 19. Jan 00:54 robots.txt drwxrwxrwx 2 root www 4096 19. Jan 00:54 scripts drwxrwxrwx 4 root www 4096 19. Jan 00:54 sites drwxrwxrwx 7 root www 4096 19. Jan 00:54 themes -rwxrwxrwx 1 root www 26250 19. Jan 00:54 update.php -rwxrwxrwx 1 root www 4864 19. Jan 00:54 UPGRADE.txt -rwxrwxrwx 1 root www 294 19. Jan 00:54 xmlrpc.php linux-vi17:/srv/www/htdocs/com624 # thx to BetaRides answer here a quick overview on the drush functionality with rsync http://drush.ws/ core-rsync Rsync the Drupal tree to/from another server using ssh. Examples: drush rsync @dev @stage Rsync Drupal root from dev to stage (one of which must be local). drush rsync ./ @stage:%files/img Rsync all files in the current directory to the 'img' directory in the file storage folder on stage. Arguments: source May be rsync path or site alias. See rsync documentation and example.aliases.drushrc.php. destination May be rsync path or site alias. See rsync documentation and example.aliases.drushrc.php. Options: --mode The unary flags to pass to rsync; --mode=rultz implies rsync -rultz. Default is -az. --RSYNC-FLAG Most rsync flags passed to drush sync will be passed on to rsync. See rsync documentation. --exclude-conf Excludes settings.php from being rsynced. Default. --include-conf Allow settings.php to be rsynced --exclude-files Exclude the files directory. --exclude-sites Exclude all directories in "sites/" except for "sites/all". --exclude-other-sites Exclude all directories in "sites/" except for "sites/all" and the site directory for the site being synced. Note: if the site directory is different between the source and destination, use --exclude-sites followed by "drush rsync @from:%site @to:%site" --exclude-paths List of paths to exclude, seperated by : (Unix-based systems) or ; (Windows). --include-paths List of paths to include, seperated by : (Unix-based systems) or ; (Windows). Topics: docs-aliases Site aliases overview with examples Aliases: rsync

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  • Powershell script to delete secondary SMTP addresses of Exchange 2010 Mail Contacts

    - by Zero Subnet
    I have a few thousand Exchange 2010 Mail Contacts who get erroneously assigned internal SMTP addresses by the default recipient policy. I'm trying to use the following command to delete these addresses (keeping the primary SMTP) and disabling the automatic update from recipient policy so the SMTP addresses don't get recreated again. Get-MailContact -OrganizationalUnit "domain.local/OU" -Filter {EmailAddresses -like *@domain.local -and name -notlike "ExchangeUM*"} -ResultSize unlimited -IgnoreDefaultScope | foreach {$contact = $_; $email = $contact.emailaddresses; $email | foreach {if ($_.smtpaddress -like *@domain.local) {$address = $_.smtpaddress; write-host "Removing address" $address "from Contact" $contact.name; Set-Mailcontact -Identity $contact.identity -EmailAddresses @{Remove=$address}; $contact | set-mailcontact -emailaddresspolicyenabled $false} }} I'm getting the following error though: You must provide a value expression on the right-hand side of the '-like' operator. At line:1 char:312 + Get-MailContact -OrganizationalUnit "domain.local/testou" -Filter {EmailAddresses -like "@domain.local" -and name -notlike "ExchangeUM"} -ResultSize unlimited -IgnoreDefaultScope | foreach {$contact = $; $ email = $contact.emailaddresses; $email | foreach {if ($.smtpaddress -like <<<< *@domain.local) {$address = $_.smt paddress; write-host "Removing address" $address "from Contact" $contact.name; Set-Mailcontact -Identity $contact.ident ity -EmailAddresses @{Remove=$address}; $contact }} + CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException + FullyQualifiedErrorId : ExpectedValueExpression Any help as to how to fix this?

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  • Help me understand FFT function (Matlab)

    - by estourodepilha.com
    1) Besides the negative frequencies, which is the minimum frequency provided by the FFT function? Is it zero? 2) If it is zero how do we plot zero on a logarithmic scale? 3) The result is always symmetrical? Or it just appears to be symmetrical? 4) If I use abs(fft(y)) to compare 2 signals, may I lose some accuracy?

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  • Intercepting mouse events using a global hook. Stop an action from happening.

    - by fMinkel
    I'm attempting to intercept and interrupt mouse events. Lets say I wanted to disable the right mouse button down event, or even the mouse move event. I haven't been able to figure out the interrupting part. I am using the (I assume pretty widely used) following code for Global Hooking of the mouse. Private Structure MSLLHOOKSTRUCT Public pt As Point Public mouseData As Int32 Public flags As Int32 Public time As Int32 Public extra As IntPtr End Structure Private _mouseHook As IntPtr Private Const WH_MOUSE_LL As Int32 = 14 Private Delegate Function MouseHookDelegate(ByVal nCode As Int32, ByVal wParam As IntPtr, ByRef lParam As MSLLHOOKSTRUCT) As Int32 <MarshalAs(UnmanagedType.FunctionPtr)> Private _mouseProc As MouseHookDelegate Private Declare Function SetWindowsHookExW Lib "user32.dll" (ByVal idHook As Int32, ByVal HookProc As MouseHookDelegate, ByVal hInstance As IntPtr, ByVal wParam As Int32) As IntPtr Private Declare Function UnhookWindowsHookEx Lib "user32.dll" (ByVal hook As IntPtr) As Boolean Private Declare Function CallNextHookEx Lib "user32.dll" (ByVal idHook As Int32, ByVal nCode As Int32, ByVal wParam As IntPtr, ByRef lParam As MSLLHOOKSTRUCT) As Int32 Private Declare Function GetCurrentThreadId Lib "kernel32.dll" () As Integer Private Declare Function GetModuleHandleW Lib "kernel32.dll" (ByVal fakezero As IntPtr) As IntPtr Public Function HookMouse() As Boolean Debug.Print("Mouse Hooked") If _mouseHook = IntPtr.Zero Then _mouseProc = New MouseHookDelegate(AddressOf MouseHookProc) _mouseHook = SetWindowsHookExW(WH_MOUSE_LL, _mouseProc, GetModuleHandleW(IntPtr.Zero), 0) End If Return _mouseHook <> IntPtr.Zero End Function Public Sub UnHookMouse() Debug.Print("Mouse UnHooked") If _mouseHook = IntPtr.Zero Then Return UnhookWindowsHookEx(_mouseHook) _mouseHook = IntPtr.Zero End Sub Private Function MouseHookProc(ByVal nCode As Int32, ByVal wParam As IntPtr, ByRef lParam As MSLLHOOKSTRUCT) As Int32 'Debug.Print("Message = {0}, x={1}, y={2}", wParam.ToInt32, lParam.pt.X, lParam.pt.Y) If wParam.ToInt32 = 513 Then '''interrupt the left mouse button event here, but don't know what to return to do so. End If Return CallNextHookEx(WH_MOUSE_LL, nCode, wParam, lParam) End Function

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  • MySQL searching using many 'like' operators: is there a better way?

    - by DrAgonmoray
    I have a page that gets all rows from a table in a database, then displays the rows in an HTML table. That works great, but now I want to implement a 'search' feature. There is a searchbox, and search-terms are separated by a space. I am going to make it search three fields for the search terms, 'make' 'model' and 'type.' These three fields are VARCHAR(30). Currently if I wanted to search using 3 terms (say 'cool' 'abc' and '123') my query would look something like this. SELECT * FROM table WHERE make LIKE '%cool%' OR make LIKE '%abc%' OR make LIKE '%123%' OR model LIKE '%cool%' OR model LIKE '%abc%' OR model LIKE '%123%' OR type LIKE '%cool%' OR type LIKE '%abc%' OR type LIKE '%123%' That looks really bad, and it will get even worse if there are more search terms or more fields to search. My question to you: is there a better way to search? If so, what?

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  • what is the best algorithm to use for this problem

    - by slim
    Equilibrium index of a sequence is an index such that the sum of elements at lower indexes is equal to the sum of elements at higher indexes. For example, in a sequence A: A[0]=-7 A[1]=1 A[2]=5 A[3]=2 A[4]=-4 A[5]=3 A[6]=0 3 is an equilibrium index, because: A[0]+A[1]+A[2]=A[4]+A[5]+A[6] 6 is also an equilibrium index, because: A[0]+A[1]+A[2]+A[3]+A[4]+A[5]=0 (sum of zero elements is zero) 7 is not an equilibrium index, because it is not a valid index of sequence A. If you still have doubts, this is a precise definition: the integer k is an equilibrium index of a sequence if and only if and . Assume the sum of zero elements is equal zero. Write a function int equi(int[] A); that given a sequence, returns its equilibrium index (any) or -1 if no equilibrium indexes exist. Assume that the sequence may be very long.

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  • How to show 0 when no row found

    - by user1685991
    I have a SQL query in which I am passing sysdate to the query problem is that when there is no matching date in table with sysdate then it don't shows the zero even if there is nvl applied here is my query select * from molasses where trunc(trn_dte) = trunc(sysdate) But it show data only when current date is present in table but I want to show zero if no data found in table.please help me to do this in oracle 10 g. Because some times the situation is like above and I have to display zero when no data found

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  • How is the MAC address on a computer determined?

    - by Zero Stack
    While imaging some computers today, I started to wonder... what if two LAN MAC addresses on two different computers matched?... That would cause some problems. I later came to understand that the MAC address' 48-bit address space contains potentially 248 or 281,474,976,710,656 possible MAC addresses. [ in other-words, a lot of networking devices ] How are these MAC addresses determined? Will we ever run out of them? ( I know the second question is speculation, but there are a lot of devices that require a mac addresses...) Do MAC addresses get recycled?

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  • I need to change a zip code into a series of dots and dashes (a barcode), but I can't figure out how

    - by Maggie
    Here's what I've got so far: def encodeFive(zip): zero = "||:::" one = ":::||" two = "::|:|" three = "::||:" four = ":|::|" five = ":|:|:" six = ":||::" seven = "|:::|" eight = "|::|:" nine = "|:|::" codeList = [zero,one,two,three,four,five,six,seven,eight,nine] allCodes = zero+one+two+three+four+five+six+seven+eight+nine code = "" digits = str(zip) for i in digits: code = code + i return code With this I'll get the original zip code in a string, but none of the numbers are encoded into the barcode. I've figured out how to encode one number, but it wont work the same way with five numbers.

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  • What's the importance of restoring SQL Server system databases (model, master, etc.)?

    - by Zero Subnet
    I had to restore some production databases to a different drive on the same Microsoft SQL Server 2005 machine. That worked fine and the application using the databases is back online. However, i have not restored the system (or default?) databases that SQL Server creates on its own (model, master, etc.). My question is, what is the role of these databases? and how important it is that i restore them?

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