syntax

问题 This question already has answers here : JavaScript object literals syntax error (2 answers) Uncaught SyntaxError: Unexpected token instanceof (with Chrome Javascript console) (4 answers) Closed 3 years ago . > "[object Number]" === Object.prototype.toString.call(1) // #1 < true > "[object Number]" === {}.toString.call(1) // #2 < true > {}.toString.call(1) === "[object Number]" // #3 < SyntaxError: Unexpected token '.' > ({}).toString.call(1) === "[object Number]" // #4 < true > {}.toString

问题 I want to implement the following: throwingFunction()??.doStuff() /* if throwingFunction throws an error: print the error else returns an object with the doStuff() Method */ throwingFunction()?? /* if an error is thrown, prints the error. else execute the function without errors. */ I'm not sure where to look in the source code for examples on how do, try, catch were implemented. The Swift error docs explain how to use error handle methods that are already implemented. To be clear, I want to

问题 I have this awesome script I use to generate a list of folders with their assigned security groups and each user in each group. When I run it, I type .\getfolderacls.ps1 -verbose | export-csv c:\temp\filename.csv -notypeinformation . That works perfectly, but I'd like to hardcode the | export-csv... part so that I can just run it without the arguments (or are they parameters?). I tried simply appending | export-csv c:\temp\test.csv -notypeinformation to the bottom of the script, but that

问题 For sake the of learning only. Let's say I have a variable, in this example a textbox, how could I set many properties at once without typing the variable name over and over. I've attempted some stuff my self, one of them work for some odd reason. This example works. Break is used to shorten the loop. $Textbox | % { $_.Text = "Hello World" $_.Background = "Black" $_.Foreground = "Green" Break } These two examples do not work and are here just to see what I've attempted. This was with and

问题 I have a flattened JSON: { "CaseName" : "John Doe v. State", "CaseDate" : "<some date>", "Client.FirstName" : "John", "Client.LastName" : "Doe", "Client.Email" : "johndoe@gmail.com" etc... } I want to deserialize it back to this entity: public class Case() { public string CaseName { get; set; } public string CaseDate { get; set; } public Client Client { get; set; } } where Client.FirstName , Client.LastName , and Client.Email are properties in the Client object. Using Json.NET, is there any

问题 I have a flattened JSON: { "CaseName" : "John Doe v. State", "CaseDate" : "<some date>", "Client.FirstName" : "John", "Client.LastName" : "Doe", "Client.Email" : "johndoe@gmail.com" etc... } I want to deserialize it back to this entity: public class Case() { public string CaseName { get; set; } public string CaseDate { get; set; } public Client Client { get; set; } } where Client.FirstName , Client.LastName , and Client.Email are properties in the Client object. Using Json.NET, is there any

问题 I have a flattened JSON: { "CaseName" : "John Doe v. State", "CaseDate" : "<some date>", "Client.FirstName" : "John", "Client.LastName" : "Doe", "Client.Email" : "johndoe@gmail.com" etc... } I want to deserialize it back to this entity: public class Case() { public string CaseName { get; set; } public string CaseDate { get; set; } public Client Client { get; set; } } where Client.FirstName , Client.LastName , and Client.Email are properties in the Client object. Using Json.NET, is there any

问题 This question already has answers here : What are those pipe symbols for in Ruby? (7 answers) Closed 8 days ago . What is the | | around profile below called, what does it mean, and why it is after do ? I thought do is followed by a loop block or so. ticks = get_all[0...MAX].map do |profile| # ... end 回答1: it's like a foreach, so profile will be a different value in each of the functions calls, one function call per element in get_all. see this: my_array = [:uno, :dos, :tres] my_array.each do

问题 I tried to confirm if a file exists using the following line of code: os.path.isfile() But I noticed if back slash is used by copy&paste from Windows OS: os.path.isfile("C:\Users\xxx\Desktop\xxx") I got a syntax error: (unicode error) etc etc etc. When forward slash is used: os.path.isfile("C:/Users/xxx/Desktop/xxx") It worked. Can I please ask why this happened? Even the answer is as simple as :"It is a convention." 回答1: Backslash is the escape symbol. This should work: os.path.isfile("C:\

问题 I tried to confirm if a file exists using the following line of code: os.path.isfile() But I noticed if back slash is used by copy&paste from Windows OS: os.path.isfile("C:\Users\xxx\Desktop\xxx") I got a syntax error: (unicode error) etc etc etc. When forward slash is used: os.path.isfile("C:/Users/xxx/Desktop/xxx") It worked. Can I please ask why this happened? Even the answer is as simple as :"It is a convention." 回答1: Backslash is the escape symbol. This should work: os.path.isfile("C:\