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  • Good starting point to learn regular expressions.

    - by Jeremy Rudd
    I'm good at learning new languages and platforms, though whenever I try to learn Reg Ex I cannot make sense of it. I once even used the Regular Expression Designer to try and put some together. What's a good starting point to understanding what looks like the only rocket-science programming language in the world? Links to articles, books or anything else that could help me get my grounding would be appreciated.

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  • Matlab - Find point of intersection between two vectors

    - by Silv3rSurf
    I have a very simple matlab question. What is the easiest way to find the point of intersection between two vectors. I am not familiar with the various matlab fuctions -- it seems like there should be one for this. For example if I have one vector from (0,0) to (6,6) and another vector from (0,6) to (6,0), I need to determine that they intersect at (3,3) Thanks.

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  • Sending floating point values between processes with pipes in C

    - by Alex
    Is there a standard way of sending floating point values from a child process to a parent process in C. I have a some calculations where I want to fork a process, then have the child do some busy work, the parent do something else, and then the child send its values (which are doubles) back to the parent (presumably through a pipe). Clearly the parent could parse the stream, but I'm just wondering if there's a cleaner way?

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  • Is a point inside or outside a polygon which is on the surface of a globe

    - by richard
    How do I determine if a point is inside or outside a polygon that lies on the the surface of the earth? The inside of the polygon can be determined via the right hand rule, ie. the inside of the polygon is on your right hand side when you walk around the polygon. The polygon may Circle either pole Cross the 180 longitude Cover more than 50% of the globe As the globe is a sphere the normal ray crossing algorithms do not work correctly.

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  • Preferred Access point name

    - by rantravee
    Hi, I'm hoping that someone will explain to me what preferred access point name refers to in the android system , and what is it's role . Also I'd like to know if by messing with all APN (adding a suffix to the "apn" and "type" fields to disable 3G/EDGE/GPRS connections , and the deleting this suffix ) , the preferred APN can be disrupted. Also if it need special settings in case an APN manipulation is desired.

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  • Why does 99.99 / 100 = 0.9998999999999999

    - by the-locster
    Whereas 99.99 * 0.01 = 0.99 Clearly this is the age old floating point rounding issue, however the rounding error in this case seems quite large to me; what I mean is I might have expected a result of 0.99990000001 or some similar 'close' result. And for the record I got the same answer in a JavaVM and in a .Net environment.

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  • Best way to send floating point numbers from .NET to Java and back

    - by Evgeny
    I'm writing a .NET application that will make an RPC call to a Java application (via a message queue). The data sent in both directions will be large arrays of floating-point numbers. What is the best way to serialize them to send them across the wire? I'd like something more compact than text, but architecture-independent as the server may not be an x86 machine. The Java application can be changed as needed.

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  • Changing git origin to point to an existing repository

    - by int3
    I'd like to make my local repo point to a different fork of the same project. Will this work? Do a merge with the 'target origin' Change the origin repo in my config file to the 'target origin' Also, if my local repo is not entirely identical to the new origin (say, I've resolved some merge conflicts in my favor), will these changes be pushed to the new origin when I do a git push, or will only commits made after the change of origin get pushed?

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  • Point one style class to another?

    - by user246114
    Hi, I have a css class like: .foo { background-color: red; } then I have a class specified for a list: .list1 li { background-color: tan; } is it possible to set one style class to just point to another? Something like: .list1 li { .foo; } not sure how to articulate that - I just want the .list li style to be whatever I define for the .foo class. Thanks

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  • round() for float in C++

    - by Roddy
    I need a simple floating point rounding function, thus: double round(double); round(0.1) = 0 round(-0.1) = 0 round(-0.9) = -1 I can find ceil() and floor() in the math.h - but not round(). Is it present in the standard C++ library under another name, or is it missing??

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  • XNA: What is the point of Unload()?

    - by Rosarch
    XNA games have an Unload() method, where content is supposed to be unloaded. But what is the point of this? If all the content is being unloaded, then the game must be exiting, in which case everything would be garbage collected anyway, right?

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  • HashMap.containsValue - What's the point?

    - by Frederik
    I've got a HashMap and I need to fetch an item by its integer value. I notice there's a containsValue() function, but it would appear I still have to iterate through the map to find the correct index anyway. My question is; why use containsValue() if I'm required to traverse it afterwards? Also, am I missing the point completely? ;-)

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  • Why PC reboots when there’s a power failure even with UPS?

    - by Jamil
    I've purchased a Line Interactive UPS 1200VA. It's supposed to give 8~20min backup (as written in the manual). This UPS has transfer time < 10ms. It works fine when the mains is active. But the problem is that when the power went off, the PC also went off for a fraction of a second and started rebooting. The strangest thing though is that it has to be a proper power failure by the service supplier. If I just turn off the power at the wall plug, the UPS kicks in immediately and the PC carries on working fine. What's the solution of that? What should I do? My hard drive was physically damaged because of improper shut down & restart. I've 5~8 times power outage in my country so I badly need an UPS.

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  • UPS: Do i require a special extension cord for power in?

    - by rism
    I have a couple of Tripplite UPS systems. The power in cables are bright orange and about 2 meters in length. I want to put the system on the other side of the room but for some reason the UPS keep "going off" over there. So I guess the wall power sockets on that side of the room are a little dodgy. So i figured Id just go online and get some replacement UPS power IN (from wall to UPS) cables of an appropriate length. But i cant find any anywhere. (auction sites, tripplite store, cable websites). So now I'm wondering if that's just because you can use a standard extension cord of an appropriate wattage? I thought the UPS power IN cables were "special". Is that not so?

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  • VMware Workstation "Power off" and "Suspend" buttons are disabled. What is going on?

    - by Ed Norris
    I've been using an XP image for a few months now with no problems. Recently the power off and resume buttons were disabled and I'm not sure what happened to cause that. In addition, the menu items to do those functions are grayed out (like VM | Power | Power Off) I'm using VMware Workstation 6.5.3 on a Windows 7 64-bit host. The image is Windows XP 32-bit. There is plenty of free space and memory on the host and the CPU is not pegged. I am able to power off the image through its Start menu, but that's a workaround not a fix. Any suggestions? TIA EDIT: Well after manually shutting down the image then closing and reopening the image file (which I've done before) in preparation for reinstalling the tools as suggested below, it looks fine. The power off and suspend buttons are enabled and work. So what do I do with this question now? "Close and restart a few times and it may work" doesn't seem useful...

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  • Can a motherboard be faulty even if it's getting power and so are components hooked up to it?

    - by Davy8
    Sort of a followup to this question. The mobo's getting power, the lights are on. The GPU fan is spinning (it doesn't use auxiliary power, it's only connected to the mobo). I'm not getting any video signal, and it's not the video card (nor monitor) that's faulty, so I'm suspecting mobo or CPU (possibly RAM?) and I'm trying to pinpoint which part is at fault. Is the motherboard a candidate for being broken or is it not very likely if it's getting power and powering other components? The CPU fan is getting power as well.

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  • Can I use stronger power supply to charge Kindle? [closed]

    - by Bobb
    I have power supply for Kindle with output 5V 0.85A. And I have Samsung Galaxy Pad one with output of 5V 2A. My guess is that a device will consume as much current as it can but no more than max power supply current. For example if Kindle device consumes 0.6A for charging its battery then it shouldnt create more than 0.6A current using Galaxy Pad power supply. So my guess - if I charge Kindle with Galaxy Pad power supply it wont burn out. Is that right?

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  • Getting SQL Syntax Error in INSERT INTO statement in Access 2010

    - by hello123
    I have written the following Insert Into statement in Access 2010 VBA: Private Sub AddBPSSButton_Click() ' CurrentDb.Execute "INSERT INTO TabClearDetail(C_Site) VALUES(" & Me.C_Site & ")" Dim strSQL As String 'MsgBox Me.[Clearance Applying For] 'MsgBox Me.[Contract Applying for] 'MsgBox Me.[C_Site] 'MsgBox Me.[C_SponsorSurname] 'MsgBox Me.[C_SponsorForename] 'MsgBox Me.[C_SponsorContactDetails] 'MsgBox Me.[C_EmploymentDetail] 'MsgBox Me.[C_SGNumber] 'MsgBox Me.[C_REF1DateRecd] 'MsgBox Me.[C_REF2DateRecd] 'MsgBox Me.[C_IDDateRecd] 'MsgBox Me.[C_IDNum] 'MsgBox Me.[C_CriminalDeclarationDate] 'MsgBox Me.[Credit Check Consent] 'MsgBox Me.[C_CreditCheckDate] 'MsgBox Me.[Referred for Management Decision] 'MsgBox Me.[Management Decision Date] 'MsgBox Me.[C_Comment] 'MsgBox Me.[C_DateCleared] 'MsgBox Me.[C_ClearanceLevel] 'MsgBox Me.[C_ContractAssigned] 'MsgBox Me.[C_ExpiryDate] 'MsgBox Me.[C_LinKRef] 'MsgBox Me.[C_OfficialSecretsDate] strSQL = "INSERT INTO TabClearDetail(Clearance Applying For, Contract Applying for, " & _ "C_Site, C_SponsorSurname, C_SponsorForename, C_SponsorContactDetails, C_EmploymentDetail, " & _ "C_SGNumber, C_REF1DateRecd, C_RED2DateRecd, C_IDDateRecd, C_IDNum, " & _ "C_CriminalDeclarationDate, Credit Check Consent, C_CreditCheckDate, Referred for Management Decision, " & _ "Management Decision Date, C_Comment, C_DateCleared, C_ClearanceLevel, C_ContractAssigned, " & _ "C_ExpiryDate, C_LinkRef, C_OfficialSecretsDate) VALUES('" & Me.[Clearance Applying For] & "', " & _ "'" & Me.[Contract Applying for] & "', '" & Me.[C_Site] & "', '" & Me.[C_SponsorSurname] & "', " & _ "'" & Me.[C_SponsorForename] & "', '" & Me.[C_SponsorContactDetails] & "', " & _ "'" & Me.[C_EmploymentDetail] & "', '" & Me.[C_SGNumber] & "', '" & Me.[C_REF1DateRecd] & "', " & _ "'" & Me.[C_REF2DateRecd] & "', '" & Me.[C_IDDateRecd] & "', '" & Me.[C_IDNum] & "', " & _ "'" & Me.[C_CriminalDeclarationDate] & "', '" & Me.[Credit Check Consent] & "', '" & Me.[C_CreditCheckDate] & "', " & _ "'" & Me.[Referred for Management Decision] & "', '" & Me.[Management Decision Date] & "', " & _ "'" & Me.[C_Comment] & "', '" & Me.[C_DateCleared] & "', '" & Me.[C_ClearanceLevel] & "', " & _ "'" & Me.[C_ContractAssigned] & "', '" & Me.[C_ExpiryDate] & "', '" & Me.[C_LinKRef] & "', " & _ "'" & Me.[C_OfficialSecretsDate] & "');" DoCmd.RunSQL (strSQL) 'MsgBox strSQL End Sub All The MsgBox calls work, so I believe I have typed all column names and text box names correctly. I am getting a Syntax error when I get to the DoCmd.RunSQL line. Have been staring at this for quite a while trying to see if I have missed a comma or speech mark or something, but am hoping maybe another set of eyes will see my mistake. Any help will be greatly appreciated. Thanks!

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  • Create a named cell dynamically

    - by CaptMorgan
    I have a workbook with 3 worksheets. 1 worksheet will have input values (not created at the moment and not needed for this question), 1 worksheet with several "template" or "source" tables, and the last worksheet has 4 formatted "target" tables (empty or not doesn't matter). Each template table has 3 columns, 1 column identifying what the values are for in the second 2 columns. The value columns have formulas in them and each cell is Named. The formulas use the cell Names rather than cell address (e.g. MyData1 instead of C2). I am trying to copy the templates into the target tables while also either copying the cell Names from the source into the targets or create the Names in the target tables based on the source cell Names. My code below I am creating the target names by using a "base" in the Name that will be changed depending on which target table it gets copied to. my sample tables have "Num0_" for a base in all the cell names (e.g. Num0_MyData1, Num0_SomeOtherData2, etc). Once the copy has completed the code will then name the cells by looking at the target Names (and address), replacing the base of the name with a new base, just adding a number of which target table it goes to, and replacing the sheet name in the address. Here's where I need help. The way I am changing that address will only work if my template and target are using the same cell addresses of their perspective sheets. Which they are not. (e.g. Template1 table has value cells, each named, of B2 thru C10, and my target table for the copy may be F52 thur G60). Bottom line I need to figure out how to copy those names over with the templates or name the cells dynamically by doing something like a replace where I am incrementing the address value based on my target table #...remember I have 4 target tables which are static, I will only copy to those areas. I am a newbie to vba so any suggestions or help is appreciated. NOTE: The copying of the table works as I want. It even names the cells (if the Template and Target Table have the same local worksheet cell address (e.g. C2) 'Declare Module level variables 'Variables for target tables are defined in sub's for each target table. Dim cellName As Name Dim newName As String Dim newAddress As String Dim newSheetVar Dim oldSheetVar Dim oldNameVar Dim srcTable1 Sub copyTables() newSheetVar = "TestSheet" oldSheetVar = "Templates" oldNameVar = "Num0_" srcTable1 = "TestTableTemplate" 'Call sub functions to copy tables, name cells and update functions. copySrc1Table copySrc2Table End Sub '****there is another sub identical to this one below for copySrc2Table. Sub copySrc1Table() newNameVar = "Num1_" trgTable1 = "SourceEnvTable1" Sheets(oldSheetVar).Select Range(srcTable1).Select Selection.Copy For Each cellName In ActiveWorkbook.Names 'Find all names with common value If cellName.Name Like oldNameVar & "*" Then 'Replace the common value with the update value you need newName = Replace(cellName.Name, oldNameVar, newNameVar) newAddress = Replace(cellName.RefersTo, oldSheetVar, newSheetVar) 'Edit the name of the name. This will change any formulas using this name as well ActiveWorkbook.Names.Add Name:=newName, RefersTo:=newAddress End If Next cellName Sheets(newSheetVar).Select Range(trgTable1).Select Selection.PasteSpecial Paste:=xlPasteAll, Operation:=xlNone, SkipBlanks:= _ False, Transpose:=False End Sub PING

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  • What is the justification for Python's power operator associating to the right?

    - by Pieter Müller
    I am writing code to parse mathematical expression strings, and noticed that the order in which chained power operators are evaluated in Python differs from the order in Excel. From http://docs.python.org/reference/expressions.html: "Thus, in an unparenthesized sequence of power and unary operators, the operators are evaluated from right to left (this does not constrain the evaluation order for the operands): -1*2 results in -1."* This means that, in Python: 2**2**3 is evaluated as 2**(2**3) = 2**8 = 256 In Excel, it works the other way around: 2^2^3 is evaluated as (2^2)^3 = 4^3 = 64 I now have to choose an implementation for my own parser. The Excel order is easier to implement, as it mirrors the evaluation order of multiplication. I asked some people around the office what their gut feel was for the evaluation of 2^2^3 and got mixed responses. Does anybody know of any good reasons or conciderations in favour of the Python implementation? And if you don't have an answer, please comment with the result you get from gut feel - 64 or 256?

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