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  • C++ includes with and without .h

    - by wyatt
    I've never noticed it making any difference whether or not I include the .h at the end of an include, so I've always ignored the meaning, but I've just noticed in a particular program of mine, I get the error "memcpy was not declared in this scope" if I include "string", but not if I include "string.h". First of all, I was wondering the specific cause of this, but also generally the difference between the two. At the same time, if someone could explain the difference between includes in angular brackets and those in quotation marks, It'd be much appreciated.

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  • Toplink Exception, whats wrong?

    - by java_dude
    Hey, I've got an excpetion when I generate this EJB SQL Statement. Exception Description: Syntax error parsing the query [SELECT h FROM Busmodul h WHERE LOWER(h.modulNummer) LIKE :modulnummer AND h.einbauort.id = :einbauort_fk AND h.plattform.id = :plattform_fk ORDER BY TRIM(TRAILING '-' FROM CONCAT('0', h.modulNummer))], line 1, column 150: syntax error at [TRIM]. Internal Exception: line 1:150: expecting IDENT, found 'TRIM' Whats the meaning of IDENT. Any Ideas what I am doing wrong? Regards

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  • ps -ef + fourfield from ps -ef output

    - by yael
    I need explain about the four field (4 or 0 ) of ps -ef command , what the meaning of this number THX yael root 27116 27112 4 15:25 pts/0 00:00:00 grep -qsRw -m1 monitohhhhhhhr /var root 29017 27113 0 15:25 pts/0 00:00:00 grep qsRw -m1

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  • Linux Shared Memory

    - by Betamoo
    The function which creates shared memory in *inux programming takes a key as one of its parameters.. What is the meaning of this key? And How can I use it? Edit: Not shared memory id

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  • @ in AndroidManifest.xml file

    - by C.W.Holeman II
    From the O'Reilly book "Android Application Development " by Rick Rogers, John Lombardo, Zigurd Mednieks & Blake Meike: page 23: <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> page 44: <application android:icon="@drawable/icon2"> What is the meaning of the "@" in each of the above fragments?

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  • Python double underscore mangling

    - by gnr
    I am a bit confused by this behavior (using python 3.2): class Bar: pass class Foo: def __init__(self): self.__cache = None bar = Bar() bar.__cache = None foo = Foo() print(vars(bar)) #returns {'__cache': None} print(vars(foo)) #returns {'_Foo__cache': None} I've read up a bit on how double-underscores cause attribute names to be "mangled", but I would have expected the same name-mangling in both cases above. The meaning of a single- and a double-underscore before an object name in Python Any ideas what's going on here?

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  • How do you use "not" in xpath

    - by Guy
    I want to write something of the sort: //a[not contains(@id, 'xx')] (meaning all the links that there 'id' attribute doesn't contain the string 'xx') I can't find the right syntax. Thanks

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  • what is Entity Framework with POCO

    - by pdiddy
    What is the benefit of using POCO? I don't understand the meaning of Persistence Ignorance, what does this mean? That the poco object can't expose things like Save? I can't wrap my head around this POCO that there's alot of buzz around. What is the difference with the EF generated entities and POCO?

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  • Replacing multiple characters in C#

    - by Yassin
    How would i write a program, using the replace method, that rotates the vowels in a word? meaning the letter 'a' would be 'e', 'e' would be 'i', 'i' would be 'o', 'o' would be 'u', and finally 'u' would be 'a'. For example, the word "instructor" would be "onstractur". I hope someone can answer my problem.

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  • Google Maps: marker icons are multi over same location, why?

    - by JakiT
    I'm using Google Maps and have the map set to height/width=100%. I noticed that when I resize the browser window, my map marker icons appear to redraw on top of the same location. Meaning, if I should only have 1 map marker icon on "987 Main St", when I resize the browser window - multiple map marker icons are being now draw on top of "987 Main St" that shouldn't be there. Any ideas why this is happening and how to prevent it? UPDATE: Link to actual code

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  • The whole point of programming is creating abstractions

    - by Damien
    Hullo, this is Damien. I am new to programming and to StackOverflow community. Our professor once said that "the whole point of programming is creating abstractions." His explanation however went right over my head. Please explain the meaning of this sentence in simple words -- something that a noob like me can understand. Thank you!

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  • Web page width on LG mobile phone

    - by steve
    Hi I'm trying to develop a site for mobile phones. At the moment it seems to work on iphone and android htc desire and an n95. When I try it on an LG renoir instead of the page fitting the width of the screen the page displays at least twice as wide as it should meaning you can scroll left and right. Has anyone come across this before, or knows how to stop it. Warm regards

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  • Asynchronous I/O on Mac OS X

    - by stas
    Hi, Meaning the C10K problem, what is the best way to do asynch I/O on Mac OS X (assume to use on Mac and iPhone/iPad)? On Linux our choice is epoll, on Windows is I/O Completion Ports. Top priority is performance and scalability (thousands of connections). Thanks

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  • 8086 programming using TASM: pc to pc communication

    - by Komal
    .model small .stack 100 .data .code mov ah,00h mov al,0e3h mov dx,00h int 14h back: nop l1: mov ah,03h mov dx,00h int 14h and ah,01h cmp ah,01h jne l1 mov ah,02h mov dx,00h int 21h mov dl,al mov ah,02h int 21h jmb back mov ah,4ch int 21h end this a pc to pc commnication receiver program.i would like to know why have we used the mov dx,00h function and what is the meaning of mov al,0e3h this ?

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  • Is "long" still useful in C?

    - by dan04
    It's not the largest integer type anymore now that there's "long long". It's not a fixed-width type: It's 32 bits on some platforms and 64 on others. It's not necessarily the same size as a pointer (for example, on 64-bit Windows) So, does "long" have any meaning anymore? Is there ever a reason to declare a long instead of a ptrdiff_t or int64_t?

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  • Is information a subset of data?

    - by Jason Baker
    I apologize as I don't know whether this is more of a math question that belongs on mathoverflow or if it's a computer science question that belongs here. That said, I believe I understand the fundamental difference between data, information, and knowledge. My understanding is that information carries both data and meaning. One thing that I'm not clear on is whether information is data. Is information considered a special kind of data, or is it something completely different?

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  • Playing an arbitrary tone with Android.

    - by fiXedd
    Is there any way to make Android emit a sound of arbitrary frequency (meaning, I don't want to have pre-recorded sound files)? I've looked around and ToneGenerator was the only thing I was able to find that was even close, but it seems to only be capable of outputting the standard DTMF tones. Any ideas?

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