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• Convert an array of primitive longs into a List of Longs

  - by CaptainAwesomePants

  This may be a bit of an easy, headesk sort of question, but my first attempt surprisingly completely failed to work. I wanted to take an array of primitive longs and turn it into a list, which I attempted to do like this: long[] input = someAPI.getSomeLongs(); List<Long> = Arrays.asList(input); //Total failure to even compile! What's the right way to do this?

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• Difference between Array and List in scala

  - by Jeriho

  In what cases I should use Array(Buffer) and List(Buffer). Only one difference that I know is that arrays are nonvariant and lists are covariant. But what about performance and some other characteristics?

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• Maintaining property lists for xCode projects

  - by William Jockusch

  My project currently contains two largish property lists. One is currently 20KB; another is 8KB. So far, I have been maintaining them with xCode's property list editor. This is manageable but also a bit clunky. I am wondering if other people have better ways of doing this? So far, my lists consist of nested arrays of strings. The depth is not uniform.

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• Getting indices of most recent set of numbers in an array in Matlab?

  - by user2539781

  Let's say I have an array in Matlab: x = [1 1 1 2 2 2 3 3 3 3 2 2 3 3 3 1 1 1 1 1 2 2 2 2 3 3 3] I want the indices of the most recent set of consecutive '1's. In this case, I want the answer: answer = [16 17 18 19 20] % (which should correspond to the last sequence of 1's) I need an automated way to do this in Matlab, that will work with any size arrays, always giving me the indices for the last set of consecutive 1s. Any suggestions?

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• Recommendations for .NET compression library

  - by GX

  Hello, I am looking for some recommendations about compressing data in .NET, aside from using the GZipStream class. I am looking for fast and high compression of byte arrays to be able to send them via tcp. Thank you.

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• array_key_exists is not working

  - by Arun

  array_key_exists is not working for large multidimensional array. For ex $arr=array( '1'=>10, '2'=>array('21'=>21, '22'=>22, '23'=>array('test'=>100, '231'=>231), ), '3'=>30, '4'=>40 ); array_key_exists('test',$arr) returns 'false' but it works with some simple arrays.

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• Can you use non-capturing regex in String split?

  - by polygenelubricants

  System.out.println( Arrays.deepToString( "abc<def>ghi".split("(?:<)|(?:>)") ) ); This prints [abc, def, ghi], as if I had split on "<|>". I want it to print [abc, <def>, ghi]. Is there a way to work some regex magic to accomplish what I want here?

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• Javascript concatenate properties from multiple objects (associative array)

  - by Vlad

  I am looking for the best way to augment multiple javascript associative arrays. For example the following code a = { "one" : 1, "two" : 2 }; b = { "three" : 3 }; c = { "four" : 4, "five" : 5 }; d = Collect(a,b,c) Should result in value of d being: { "one" : 1, "two" : 2, "three" : 3, "four" : 4, "five" : 5 }; What is the best way to do this?

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• Converting java.util.List into a JavaFX sequence

  - by James

  What is the most concise way of converting a java.util.List into a normal JavaFX sequence (in JavaFX)? e.g. def myList = java.util.Arrays.asList(1, 2, 3); def mySequence = ... // a sequence containing [1, 2, 3]

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• Method should return multiple values

  - by Jibu P C_Adoor

  Hii I have method in C#, I have to return multiple values from that method with out using collections like arrays. Is there any reliable way ?

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• Are doubles faster than floats in c#?

  - by Trap

  I'm writing an application which reads large arrays of floats and performs some simple operations with them. I'm using floats because I thought it'd be faster than doubles, but after doing some research I've found that there's some confusion about this topic. Can anyone elaborate on this? Thanks.

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• Check if string is serialized in PHP

  - by Industrial

  Hi everyone, I am in the middle of building a cache layer for the Redis DB to my application and I have come to the point where's it's about to take care of arrays. I wonder if there's any good (high performance!) way of controlling an string to be serialized or not with PHP? Thanks a lot!

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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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• How to I make a navigation-based app?

  - by Dyldo42

  Yes, I know, most of you are thinking I'm an idiot, butt (kidding) I'm not. I've been searching everywhere for something on how to fully make a navigation-based iphone app, but all I've found is how to set up table views or navigation controllers. I haven't found anything on how to create a data model (something simple from arrays and dictionaries, SQLite and CoreData are a bit out of my scope) or navigate it. Does anyone know of any tutorials or anything like that? Thanks.

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• Easy way to convert a Doctrine_Collection of Model classes to an array of simple objects?

  - by Alex

  To clearly separate the Controller and View layers, I do not longer want to pass full objects to my views. Instead I want to pass only arrays and objects that contain the data but do not have any methods. Otherwise a view script would be able to delete Doctrine records or traverse in the object tree to data that was not intended for the view.

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• JavaScript - Storing data during user interaction

  - by Tim

  I'm working on a web based form builder that uses a mix of Jquery and PHP server side interaction. While the user is building the form I'm trying to determine the best method to store each of one of the form items before all the data is sent to the server. I've looked at the following methods Javascript arrays XML document Send each form item to the server side to be stored in a session

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• Matlab - building an array while looping

  - by Mark

  Hello, I have a for loop that loops over one array... for i=1:length(myArray) In this loop, I want to do check on the value of myArray and add it to another array myArray2 if it meets certain conditions. I looked through the Matlab docs, but couldn't find anything on creating arrays without declaring all their values on initialization or reading data into them in one shot. Many thanks!

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• Getting Frequency Components with FFT

  - by ruhig brauner

  so I was able to solv my last problem but i stubmled upon the next already. So I want to make a simple spectrogram but in oder to do so I want to understand how FFT-libaries work and what they actually calculate and return. (FFT and Signal Processing is the number 1 topic I will get into as soon as I have time but right now, I only have time for some programming exercises in the evening. ;) ) Here I just summarized the most important parts: int framesPerSecond; int samplesPerSecond; int samplesPerCycle; // right now i want to refresh the spectogram every DoubleFFT_1D fft; WAVReader audioIn; double audioL[], audioR[]; double fftL[], fftR[]; ..... framesPerSecond = 30; audioIn= new WAVReader("Strobe.wav"); int samplesPerSecond = (int)audioIn.GetSampleRate(); samplesPerCycle = (int)(audioIn.GetSampleRate()/framesPerSecond); audioL = new double[samplesPerCycle*2]; audioR = new double[samplesPerCycle*2]; fftL = new double[samplesPerCycle]; fftR = new double[samplesPerCycle]; for(int i = 0; i < samplesPerCycle; i++) { // don't even know why,... fftL[i] = 0; fftR[i] = 0; } fft = new DoubleFFT_1D(samplesPerCycle); ..... for(int i = 0; i < samplesPerCycle; i++) { audioIn.GetStereoSamples(temp); audioL[i]=temp[0]; audioR[i]=temp[1]; } fft.realForwardFull(audioL); //still stereo fft.realForwardFull(audioR); System.out.println("Check"); for(int i = 0; i < samplesPerCycle; i++) { //storing the magnitude in the fftL/R arrays fftL[i] = Math.sqrt(audioL[2*i]*audioL[2*i] + audioL[2*i+1]*audioL[2*i+1]); fftR[i] = Math.sqrt(audioR[2*i]*audioR[2*i] + audioR[2*i+1]*audioR[2*i+1]); } So the question is, if I want to know, what frequencys are in the sampled signal, how do I calculate them? (When I want to print the fftL / fftR arrays, I get some exponential formes at both ends of the array.) Thx :)

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• Array model binding difficulty

  - by user281180

  I am having difficulty for using array model binding. Actually I can see that the values sent from the views are not binded to the model and the arrays still have the values already instantiated. How can I solve this problem?

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• add string to string array and display last/previous string in that string array.

  - by zaid

  i want to add the current string in a textview view to a string array in arrays.xml.then display the last/previous string of that array in a textview (setText).

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• returning aligned memory with new?

  - by Steve

  I currently allocate my memory for arrays using the MS specific mm_malloc. I align the memory, as I'm doing some heavy duty math and the vectorization takes advantage of the alignment. I was wondering if anyone knows how to overload the new operator to do the same thing, as I feel dirty malloc'ing everywhere (and would eventually like to also compile on Linux)? Thanks for any help

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• Convert a python numpy array to c++ stl vector

  - by Archy

  Hi folks, I'm looking for a way to read in c++ a text file containing numpy arrays and put the data into vector , can anyone help me out please ? Thanks a lot. Archy

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• merging in python

  - by Abruzzo Forte e Gentile

  Hi all I have the following 4 arrays ( grouped in 2 groups ) that I would like to merge in ascending order by the keys array. I can use also dictionaries as structure if it is easier. Has python any command or something to make this quickly possible? Regards MN # group 1 [7, 2, 3, 5] #keys [10,11,12,26] #values [0, 4] #keys [20, 33] #values # I would like to have [ 0, 2, 3, 4, 5, 7 ] # ordered keys [20, 11,12,33,26,33] # associated values

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• How to know in xCode how much memory occupied by my object graph.

  - by ddnv

  I have one big object graph. It begins from one root object and its properties are arrays which consist of other object and so on. I want to know how much memory is eating by this graph at all. Have xCode any instrument that will show me this information by root object?

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• In-app settings controlled by plist?

  - by cannyboy

  Is there a library or good tutorial which covers creating in-app settings, like this: http://img.skitch.com/20090625-s8bf6ahybwe3cesd1id38h3nt.jpg What I would like is if it: doesn't use the built-in Settings app is controlled by a plist file with various Dictionaries and Arrays creates a nice looking table view allows text fields as well as switches and sliders and ticks etc doesn't have any of the annoying problems I've come across when trying to build my own version (not scrolling to show the textfield, cells disappearing) It would appear that the iphone dev world is crying out for such a thing. THANK YOU!

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