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• Hardest concept to grasp as a beginner

  - by noizetoys

  When you were starting to program, what was the hardest concept for you to grasp? Was it recursion, pointers, linked lists, assignments, memory management? I was wondering what gave you headaches and how you overcame this issue and learned to love the bomb, I mean understand it. EDIT: As a followup, what helped you grok your hard-to-grasp concept?

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• Get current time crossplatform in c++

  - by Ockonal

  Hello, How can I get current time (I need hours, minutes, seconds) crossplatform in c++? I saw here make structure of values but there are a lots of another stuff that I don't need. And memory is very important here.

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• What to Learn after C++?

  - by Stephen Whitmore

  I have been learning C++ for a while now, I find it very powerful. But, the problem is the the level of abstraction is not much and I have to do memory management myself. What are the languages that I can use which uses a higher level of abstraction.

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• dot length in java - finding its definition

  - by abson

  In which class the length variable is defined in java(one used for printing array length)? Will I be able to see it defined say in Object class? EDIT : Why was this field so designed(any thing related with security or memory efficiency)?

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• Can plist files be used for holding large data such as image data etc.

  - by user272312

  Hi, I want to use plist files to hold large data such as image data and other texts. Is this feasible or is it that plist are for holding small string such as needed for settings etc. Will there be any memory issues. -- Regards, U'suf

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• Why are browsers so heavy?

  - by Kaivosukeltaja

  Back in 1998 I had a computer with 233MHz Pentium MMX CPU and a GFX card with no 3D acceleration. It was able to run games like Quake II at a decent FPS rate. My current computer has tons more performance and a mid-class GPU, yet struggles to reach 20 FPS when rendering a single model inside a skybox with WebGL. Even regular pages with lots of 2D CSS animations bring many modern computers to their metaphorical knees. As a web developer I understand there's a lot going on in a web page but not what makes it that heavy. Modern browsers compile JavaScript to CPU native machine code before running it and rendering into a canvas element shouldn't trigger DOM rebuilds so theoretically it should be a lot faster than it is. What am I missing here and is it possible to avoid or minimize whatever is making the browsers slow to build more efficient websites?

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• Light Weight repalcement to GNOME for Ubuntu

  - by Talguy

  I am working on rolling a bit of my own version of linux for my real time car application. I plan to base it off of minimal ubuntu (only needsd 32 MB of memory). I am not the most skilled person with linux so not really sure how to assess components when adding them to my system. What I am looking for is a lightweight windows manager to replace gnome and it has to support the gtkmm library. Does anyone know of one?

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• How does AVAudioPlayer load audio data?

  - by Plumenator

  Does it load the entire file at a time? Or does it act lazy and load a chunk at a time? I'm primarily interested in knowing how much memory my audio uses.

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• Queue implementation with blocked 'take()' but with eviction policy

  - by mjlee

  Is there an implementation with a blocking queue for take but bounded by a maximum size. However, when the maximum size is reached, instead of blocking, it will remove from the head. One usage is that if I have a very slow consumer, the system will not crash ( runs out of memory ) rather these message will be removed.

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• Can I assign array size using NSMutableArray?

  - by Tattat

  I used to be a Java Programmer, which the array need to declare the very first time, like this: int[] anArray; // declares an array of integers anArray = new int[10]; // allocates memory for 10 integers I don't know whether the Objective C , NSMutableArray also give me this ability or not. Actually, I want to make a 10*10 array. thz in advance.

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• Does the majority A-grade browsers cache content over https to disk?

  - by nimo9367

  I have read somewhere that javascript and css files that only get cached in memory sooner or later get pushed out by other content. Is this true? Are there any other issues regarding cashing SSL-objects?

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• How to specify the equivalent of ppn in SGE queing system ?

  - by debugger

  Hello All, Is there a way to specify the ppn ( or equivalent ) in SGE ? i don't want to use all cpus in one node so i will be able to have more memory per core. ( In PBS you would do -l nodes=16:ppn=2 for exemple) Thanks.

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• What the best multi-thread application debugger for C++ apps.

  - by Coredumped

  I'm looking for a good multi-thread-aware debugger, capable of showing performance charts of application threads on Linux, don't know if such a thing exists, perhaps as a Eclipse plugin. The idea would be to track per thread memory allocation a CPU usage as well as being able to interrupt a thread and examine its stack trace, local vars, etc. It does not have to be an eclipse plugin or a free tool, do any of you have heard of something similar?

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• I need to use profiler in my IDE.

  - by ashwani66476

  Hello I am using RSA7 as IDE, I need to use profiler in my IDE for memory analysis. Can any one suggest me From where I can free download it? How can I use it with RSA7? Many Thanks

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• problems with 'free' in C

  - by lego69

  hello, can somebody please explain can I free const char* ? I allocated new memory using malloc and when I'm trying to free it I always receive an error incompatible pointer type thanks in advance something like this char* name="Arnold"; const char* str=malloc(stlen(name)+1); free(str); <- here bug

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• new Integer vs valueOf

  - by LB

  Hi, I was using Sonar to make my code cleaner, and it pointed that I'm using new Integer(1) instead of Integer.valueOf(1). Because it seems that valueOf does not instantiate a new object so is more memory-friendly. How can valueOf not instantiate a new object ? How does it work ? Is this true for all integers ? thanks.

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• if with multiple conditions, order of execution

  - by markus

  Hi, In an if statement with multiple conditions is second executed if the outcome is clear after checking the first condition? example: if(i>0 && array[i]==0){ } If I swap the conditions a seg fault may occur for negative values of i but this way the memory debugger doesn't find a problem. Can I be sure that this works always or do have have to use nested if statements?

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• Possible reasons and resolutions for time out

  - by ming yeow

  I cannot SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst UPDATE: It is not about permissions - i can log in normally just fine. I suspect it might be because of memory issues

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• What does "performant" software actually mean?

  - by Roddy

  I see it used a lot, but haven't seen a definition that makes complete sense. Wiktionary says "characterized by an adequate or excellent level of performance or efficiency", which isn't much help. Initially I though performant just meant "fast", but others seem to think it's also about stability, code quality, memory use/footprint, or some combination of all those. I think this is a "real" question - but if enough people reckon this is a subjective question, that's an answer in itself.

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• Unable to debug St9bad_alloc error. Tried reducing the size of the data structure, error still persists

  - by timtowtdi

  I get a St9bad_alloc error which I'm unable to debug. I tried reducing the size of the data structure to eliminate the possibility that I might be running out of memory but that doesn't seem to be the case. These are the relevant files:- gdb backtrace: http://pastebin.com/5hFhHXnL TraceCache.cc: http://pastebin.com/j8vK812j I can't understand how, in the backtrace it jumps from TraceCache.cc:55 to TraceCache.cc:34 whereas in my code I can't see any such path. Please let me know in case any other information is required. Thanks

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• How Do I Migrate 100 DBs From One MS-SQL 2008 Server To Another? (looking for automation)

  - by jc4rp3nt3r

  Let me start by saying that I am not a DBA, but I am in a position where I am responsible for moving just under 100 MS-SQL 2008 DBs from our current development server, to a new/better/faster development server. As this is just a local dev server, temporary downtime is acceptable, but I am looking for a way to move all of the databases (preferably in bulk). I know that I could take a bak of each, and restore it on the new server, but given the volume of DBs, I am looking for a more efficient way. I am not opposed to learning a new piece of software, writing code or any other requirement, so long as it speeds up the process.

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• Building an AIR application with ANT

  - by jonbcampos

  I keep getting "Java Heap Space" error. What is the JVM Memory requirements to build AIR apps with ant?

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• Delphi: Which are the downsides of having unused units listed in the uses clause?

  - by user193655

  I use cnPack Uses cleaner, but in general which are the downsides of having useless units? I know some of them: 1) of course if the unit is never used across the full project there will be useless resource consuption 2) the code insight will give useless results 3) the code insight will be slower But imagine a simple case: I have a project with 2 forms, I use StrUtils in one of them but I declared StrUtils in both of them... Is there any downside in temrs of memory consumption in this case or not?

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• Appverifier and Visual Studio for leak detection

  - by Patito

  Hi, I'm running Appverifier in an application. When it detects a memory leaks the logs saids "Address of the leaked allocation. Run !heap -p -a to get additional information about the allocation." I guess that's when you are running in Windbg, is there any way to access the allocation stack trace from inside Visual Studio ?

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• GC generation 3 appearing in windbg

  - by Johnv2020

  I've a dump file of a process I'm running (trying to find a memory leak) One thing I've noticed is that when I dump the bigger objects via !do windbg tells me that they are GC generation 3 ?? All of these are byte arrays so when I look at all the byte arrays in the dump I can see GC generations 0, 1, 2 & 3. Could someone explain whats going on here as I thought there was only 3 generations of GC.

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