record

问题 I am basically attempting to see if I can emulate an ORM framework within Haskell, so that if a user wants to make a database model, they would do something like this data Car = Car { company :: String, model :: String, year :: Int } deriving (Model) Where the table would be "Car", and the columns would be the company,model,year To do this within Haskell, you have to use a combination of classes and generics, and this is where I am getting stuck. Using this tutorial (http://www.haskell.org

问题 I am attempting to use gdb's record feature to generate a list of the instructions executed for the tutorial example I can use gdb record to step forward and back successfully and save the execution log to a file using "record save". I think what I want to do is "record instruction-history" which from docs Disassembles instructions from the recorded execution log But when I attempt this i get the error: You can't do that when your target is 'record-full' Attempting to set the record target to

问题 I am attempting to use gdb's record feature to generate a list of the instructions executed for the tutorial example I can use gdb record to step forward and back successfully and save the execution log to a file using "record save". I think what I want to do is "record instruction-history" which from docs Disassembles instructions from the recorded execution log But when I attempt this i get the error: You can't do that when your target is 'record-full' Attempting to set the record target to

问题 I am using MS Access 2007. I am collecting data of different types of businesses within a town area, arranged by streets, the business. In TableA, I have a list of different specific streets, no duplicates, field: Street; and another, field: NumOfBusinesses. In TableB, I have a list of different specific businesses, Business; and what street they are on, Street. eg TableA STREET..................NUMOFBUSINESSES High Street Sheep Street Silver Street Gold Street TableB BUSINESS...............

问题 I am fairly new to XPATH and need to return a value from multiple XML objects when a certain node is equal to one of two values. The solution also needs to be namespace agnostic using local-name(). Given the following XML, I am looking to return all of the values of "B" where "A" is equal to either "4" or "5". <?xml version="1.0"?> <element> <A>3</A> <B>Value 1</B> </element> <element> <A>4</A> <B>Value 2</B> </element> <element> <A>5</A> <B>Value 3</B> </element> I have tried many iterations

问题 I have a record type with methods, representing an specific hardware measurement type, read from the instrument as a string. The record contains implicit coversion to (and from) a string. If I cast a string as a record type, it seems to work, but is this safe? That is, does casting a string to a record with implicit string conversion call the implicit conversion as per assigning a temporary value? var a: MeasurementRecord; // record type with implicit string conversion & decode methods b:

问题 My goal is to write C# that turns Microsoft LYNC meeting audio into text. Here is my project so far. Initially I was trying to record from microphone, save it to WAV then convert WAV to FLAC and using GoogleSpeechAPI, convert FLAC to text. But I got stuck recording microphone audio to WAV format. The problem is it needs to be in a very specific WAV format, i.e. int16 or int24 for the WAV to work with the WAV to FLAC convertion method. I kept recording 8 bits per sample instead of (16 or 24

问题 I am attempting to create a function that stores a number into a record and then adds value X to that number every time the function runs. Value: 5 Run Function (Add One): 1 Value should be: 6 Run Function (Add One): 1 value should be 7 I tried to use a record: -record(adder,{value :: integer()}). ---function Number = random:uniform(6), L=#added{value = Number + #added.value}. This does not work as it resets the value every time. Any suggestions? 回答1: Take a look at this code: -module(test).

问题 Can i run two instances of Android MediaRecorder class at the same time? For example public MediaRecorder mrec1 ; public MediaRecorder mrec2 ; mrec1.setCamera(mCamera); mrec1.setPreviewDisplay(surfaceHolder.getSurface()); mrec1.setVideoSource(MediaRecorder.VideoSource.CAMERA) . . . . mrec2.setAudioSource(MediaRecorder.AudioSource.MIC); mrec2.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mrec2.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); . . . . mrec1.prepare(); mrec2.prepare()

问题 I have defined two record types: type name = { r0: int; r1: int; c0: int; c1: int; typ: dtype; uid: uid (* key *) } and func = { name: string; typ: dtype; params: var list; body: block } And I have got an error later for a line of code: Error: The record field label typ belongs to the type Syntax.func but is mixed here with labels of type Syntax.name Could anyone tell me if we should not have two fields of two records have same label, like typ here, which makes compiler confuse. 回答1: No you