arrays

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . Improve this question I have an integer array: int a[5]={5,21,456,1,3} I need to store these number into char array so that the char array will have some thing like this: char *s="52145613"; Is there any library function in c for this? 回答1: sprintf do what you need. Little example

问题 I have a typed array full of binary data that is being generated from an ArrayBuffer var myArr = new Uint8Array(myBuffer); I am presenting this to the user with var blob = new Blob(myArr, {type: "octet/stream"}; var blobURL = URL.createObjectURL(blob); and inserting a link that is "<a href=" + blobUrl + " download=" + filename "/a>" Later, I am letting the user select the file from disk, and using a file reader to do with var reader = new FileReader(); reader.onload = function () { console

问题 I have a typed array full of binary data that is being generated from an ArrayBuffer var myArr = new Uint8Array(myBuffer); I am presenting this to the user with var blob = new Blob(myArr, {type: "octet/stream"}; var blobURL = URL.createObjectURL(blob); and inserting a link that is "<a href=" + blobUrl + " download=" + filename "/a>" Later, I am letting the user select the file from disk, and using a file reader to do with var reader = new FileReader(); reader.onload = function () { console

问题 when using ar.toArray(new String[ar.size()]) Android studio 3.2.1 warns about pre-sized array and recommends empty array : There are two styles to convert a collection to an array: either using a pre-sized array (like c.toArray(new String[c.size()])) or using an empty array (like c.toArray(new String[0]). In older Java versions using pre-sized array was recommended, as the reflection call which is necessary to create an array of proper size was quite slow. However since late updates of

问题 when using ar.toArray(new String[ar.size()]) Android studio 3.2.1 warns about pre-sized array and recommends empty array : There are two styles to convert a collection to an array: either using a pre-sized array (like c.toArray(new String[c.size()])) or using an empty array (like c.toArray(new String[0]). In older Java versions using pre-sized array was recommended, as the reflection call which is necessary to create an array of proper size was quite slow. However since late updates of

问题 I need to merge those two arrays: $ar1 = array("color" => array("red", "green"), "aa"); $ar2 = array("color" => array( "green", "blue"), "bb"); $result = array_merge_recursive($ar1, $ar2); Expected output: [ 'color' => [ (int) 0 => 'red', (int) 1 => 'green', (int) 3 => 'blue' ], (int) 0 => 'aa', (int) 1 => 'bb' ] But it outputs: [ 'color' => [ (int) 0 => 'red', (int) 1 => 'green', (int) 2 => 'green', (!) (int) 3 => 'blue' ], (int) 0 => 'aa', (int) 1 => 'bb' ] I'm looking for the simplest way

问题 Why does the following work? class A { public int[,] i = { { 1, 2, 3 }, { 1, 2, 3 }, { 1, 2, 3 } }; static void Main(string[] args) { } } Whereas the following does not? class A { public const int[,] i = { { 1, 2, 3 }, { 1, 2, 3 }, { 1, 2, 3 } }; static void Main(string[] args) { } } It does not allow for a const reference type other than string to be assigned anything other than null. Since it's an array (reference) it must be assigned null(?). How would it be initialized if it's constant

问题 When dealing with rolling windows, I wrote my functions in the way like list comprehension [np.std(x[i:i+framesize]) for i in range(0, len(x)-framesize, hopsize)])] Recently I discovered numpy.lib.stride_tricks.as_strided and found it is used widely for rolling windows (for example, this post), even though it is a "hidden" function. In this issue concerning why stride_tricks.as_strided is undocumented, it's mentioned that Intentionally! It's dangerous! It was just low-level plumbing to help

问题 I have an array of objects in this format: var full_list = [ { "pid": 1, "items":[ {"item_id": '9'}, {"item_id": '10'}, {"item_id": '12'} ] }, { "pid": 2, "items":[ {"item_id": '33'}, {"item_id": '22'}, {"item_id": '65'} ] }... ]; I have a tmp array which consists of objects from the full array: var tmp_list = [ { "pid": 2, "items":[ {"item_id": '33'}, {"item_id": '22'}, {"item_id": '65'} ] }, {....} I would like to filter out objects from the full list where at least one of selectedIDs

问题 I am trying to render an array of arrays of objects with a mustache template in javascript, and I have not found anyone else who has asked this question. I can render an array of objects just fine, but I can't figure out how to render an array of them. I could assign each nested array to its own variable I suppose, but there could be any number of them, so I really need to keep them as an array. Here is the type of data I need to render: [ [ { id: 12345, name: "Billy" }, { id: 23456, name: