stringify

来源： https://stackoverflow.com/questions/12051357/setting-and-getting-object-to-local-storage-using-stringify

来源： https://stackoverflow.com/questions/12051357/setting-and-getting-object-to-local-storage-using-stringify

来源： https://stackoverflow.com/questions/63322202/json-dynamically-refer-to-another-value

问题 I'm trying to convert an array of arrays to a list of JSON objects. var headers = ['first name','last name','age'] var data = [ [ 'John', 'Gill', '21' ], [ 'Sai', 'Varun', '21' ] ] When we use the above two lists to generate a list of JSON's, output will be like, [ { 'First name': 'John', 'Last name': 'Gill', age: '21' }, { 'First name': 'Sai', 'Last name': 'Varun', age: '21' } ] But I'm in need of the output to be as, (double quoted strings and the JSON should not be a string but should be a

问题 I am new to PowerShell and trying to get a list of VM names and their associated IP Addresses from within Hyper-V. I am getting the information fine on the screen but when I try to export to csv all I get for the IP Addresses is "System.Collections.Generic.List`1[System.String]" on each line. There are suggestions about "joins" or "ConvertTo-CSV" but I don't understand the syntax for these. Can anyone help? This is the syntax I am using... Get-VM | Select -ExpandProperty

问题 The query on the API is structured like this: ../myapi/products?_q=genre,retail_price&_a=g,p&p.gt=10&p.lt=20&g.eq=POP There are two arrays: _q which lists the query parameters and _a listing the corresponding aliases. So p -> retail_price and g -> genres I can parse this into: {$and : [ genre: { '$eq': 'POP' }, retail_price: { '$gt': '10' }, retail_price: { '$lt': '20' } ]} Almost happy. But there are a couple of problems with this approach: 1. the '$eq' etc instead of $eq etc 2. the numeric

问题 How to append an existing JSON file with comma "," as separator anchors = [ { "title":" 2.0 Wireless " } ] fs.appendFileSync('testOutput.json', JSON.stringify(anchors)); This current code's output is like this [ { "title":" 2.0 Wireless " } ] [ { "title":" Marshall Major II " } ] How to I get this in the correct format with comma "," as separator I want to get something like this [ { "title":" 2.0 Wireless " }, { "title":" Marshall Major II " } ] 回答1: Try this. Don't forget to define anchors

问题 FireFox 46.0.1: I am using 3rd-party (easyrtc) software to send 15KB chunks of Float32Arrays between peers. Easyrtc insists that the data be JSON-able. Unfortunately, JSON.stringify yields a string more than twice as long as the original data: 16384 bytes of data becomes a string of length 35755. Below is my test code followed by the console output. What if anything can I do to reduce the stringify'd size? Is there a way to send the values only (no keys)? Can I use the 'replacer' argument to

问题 FireFox 46.0.1: I am using 3rd-party (easyrtc) software to send 15KB chunks of Float32Arrays between peers. Easyrtc insists that the data be JSON-able. Unfortunately, JSON.stringify yields a string more than twice as long as the original data: 16384 bytes of data becomes a string of length 35755. Below is my test code followed by the console output. What if anything can I do to reduce the stringify'd size? Is there a way to send the values only (no keys)? Can I use the 'replacer' argument to

问题 I want to have a macro that's invoked like this: GCC_WARNING(-Wuninitialized) which expands to code like this: _Pragma("GCC diagnostic ignored \"-Wuninitialized\"") I'm not having luck getting this to work, as the usual tricks of preprocessor joins and stringifying don't seem to apply or I don't know how to apply them here. 回答1: With the little help of preprocessor magic: #define HELPER0(x) #x #define HELPER1(x) HELPER0(GCC diagnostic ignored x) #define HELPER2(y) HELPER1(#y) #define GCC