array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This question already has an answer here: Serializing an object to JSON 3 answers I need to serialize an object to JSON. I'm using jQuery. Is there a "standard" way to do this? My specific situation: I have an array defined as shown below: var countries = new Array(); countries[0] = 'ga'; countries[1] = 'cd'; ... and I need to turn this into a string to pass to $.ajax() like this: $.ajax({ type: "POST", url: "Concessions.aspx/GetConcessions", data: "{'countries':['ga','cd']}", ... 回答1: JSON-js - JSON in JavaScript. To convert an object to a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have two Delphi7 programs: a COM automation server (EXE) and the other program which is using the automation server. I need to pass an array of bytes from one program to the other. After some searching I've found that using variant arrays is the way to go (correct me please if you know any better methods). My question is: How do I create a variant array in one program, and then how do I read its values in the other? I know about VarArrayCreate and VarArrayLowBound/VarArrayHighBound, but I'm unsure on how to do this properly.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to overwrite a numpy array that's a small part of a pretty complicated h5 file. I'm extracting an array, changing some values, then want to re-insert the array into the h5 file. I have no problem extracting the array that's nested. f1 = h5py . File ( file_name , 'r' ) X1 = f1 [ 'meas/frame1/data' ]. value f1 . close () My attempted code looks something like this with no success: f1 = h5py . File ( file_name , 'r+' ) dset = f1 . create_dataset ( 'meas/frame1/data' , data = X1 ) f1 . close () As a sanity check, I executed

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've got an array: myArray = [{'id':'73','foo':'bar'},{'id':'45','foo':'bar'}, etc.] I'm unable to change the structure of the array. I'm being passed an id of 45 , and I want to get 'bar' for that object in the array. How do I do this in JavaScript or using jQuery? 回答1: myArray.find(x => x.id === '45').foo; From MDN: The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned. If you want to get an array of matching elements, use the filter() method

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Do I need to subscribe/unsubscribe to individual elements of an array? I want to update each table view cell individually to reflect changes in the backing array. By changes I mean not append/remove operations but update of the properties of the objects of the array. I hope I was able to explain what I want to achieve. Thanks 回答1: To use KVO, declare the model object with dynamic properties: class Foo: NSObject { @objc dynamic var bar: String // in Swift 3, `@objc` is not necessary; in Swift 4 we must make this explicit init(bar: String) {

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to read a local file using the FileReader readAsArrayBuffer property. The read is success and in the "onload" callback, I see the Array Buffer object in reader.result. But the Array Buffer is just empty. The length is set, but not the data. How do I get this data? Here is my code the console output for reader.result e.target.result ArrayBuffer {} e.target.result.byteLength 25312 Can anyone tell me how to get this data? is there some security issue? There is no error, the onerror is not executed. From comments: Can you please let

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is it possible to assign the reference of an array as the value in the key : value pair of a hash table in perl? 回答1: Yes it is. Create a reference to the array by using backslash: $hash{key} = \@array; Note that this will link to the actual array, so if you perform a change such as: $array[0] = "foo"; That will also mean that $hash{key}[0] is set to "foo" . If that is not what you want, you may copy the values by using an anonymous array reference [ ... ] : $hash{key} = [ @array ]; Moreover, you don't have to go through the array in order

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This is probably considered a really silly question, but I'm in the process of putting together a simple template system for a website and am trying to keep track of my variable usage and keep everything neat and tidy. Can you tell me if there is any advantage/disadvantage to the following methods: simple var: $tpl_title = 'my title' $tpl_desc = 'my text' array: $tpl['title'] = 'my title' $tpl['desc'] = 'my text' Object: $tpl->title = 'my title' $tpl->desc = 'my text' I like the object method the best as it looks clean when echo'd within

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have practically no knowledge of Matlab, and need to translate some parsing routines into Python. They are for large files, that are themselves divided into 'blocks', and I'm having difficulty right from the off with the checksum at the top of the file. What exactly is going on here in Matlab? status = fseek(fid, 0, 'cof'); fposition = ftell(fid); disp(' '); disp(['** Block ',num2str(iBlock),' File Position = ',int2str(fposition)]); % ----------------- Block Start ------------------ % [A, count] = fread(fid, 3, 'uint32'); if(count == 3)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: This is described in many places but i simply cannot get it to work. I am calling a C++ function from Cython: cimport numpy as np cdef extern from "test.h" namespace "mytest" : void test ( double * A , int m ) cdef int foo (): cdef np . ndarray [ double , mode = "c" ] a = np . array ([ 1 , 2 , 3 , 4 , 5 ], dtype = float ) # pass ptr to first element of 'a' test (& a [ 0 ], len ( a )) return 0 foo () test.cpp is just: #include namespace mytest { void test ( double * A , int m ) { for ( int i = 0 ; i test.h just has: namespace mytest