string-interpolation

问题 I am new to Scala so feel free to point me in the direction of documentation but I was not able to find an answer to this question in my research. I am using scala 2.11.8 with Spark2.2 and trying to create a dynamic string containing dateString1_dateString2 (with underscores) using interpolation but having some issues. val startDt = "20180405" val endDt = "20180505" This seems to work: s"$startDt$endDt" res62: String = 2018040520180505 But this fails: s"$startDt_$endDt" <console>:27: error:

问题 @lf_araujo asked in this question: var dic = new dict of string, string dic["z"] = "23" dic["abc"] = "42" dic["pi"] = "3.141" for k in sorted_string_collection (dic.keys) print (@"$k: $(dic[k])") What is the function of @ in print(@ ... ) and lines_add(@ ...)? As this is applicable to both Genie and Vala, I thought it would be better suited as a stand-alone question. The conceptual question is: How does string interpolation work in Vala and Genie? 回答1: There are two options for string

问题 This question already has answers here : How can I print literal curly-brace characters in python string and also use .format on it? (12 answers) Closed last year . I have the following HTML template in a Python variable: template = """ <script> function work() { alert('bla'); } </script> Success rate is {value:.2%} percent. """ I want to substitute {value:.2%} with some decimal number with the appropriate formatting. Since my template may contain a lot of JavaScript code, I want to avoid

问题 I've read that you can use expressions in interpolated strings, but escaping quotes does not work. private string sth = $"{String.Join(\"\", Node.stringToType.Keys)}"; Error CS1056: Unexpected character `\0022' (CS1056) Error CS1525: Unexpected symbol `)', expecting `${', `:', or `}' (CS1525) UPDATE: The inner expression above was ment to be equivalent to String.Join("", Node.stringToType.Keys) (the two backslashes were for escaping the two double quotes) like that you can insert there any

问题 This question already has answers here : String formatting in Python (10 answers) Closed 3 years ago . So I have this as part of a mail sending script: try: content = ("""From: Fromname <fromemail> To: Toname <toemail> MIME-Version: 1.0 Content-type: text/html Subject: test This is an e-mail message to be sent in HTML format <b>This is HTML message.</b> <h1>This is headline.</h1> """) ... mail.sendmail('from', 'to', content) And I'd like to use different subjects each time (let's say it's the

问题 In Python, I'd like to create a string block with embedded expressions. In Ruby, the code looks like this: def get_val 100 end def testcode s=<<EOS This is a sample string that references a variable whose value is: #{get_val} Incrementing the value: #{get_val + 1} EOS puts s end testcode 回答1: If you need more than just a simple string formatting provided by str.format() and % then templet module could be used to insert Python expressions: from templet import stringfunction def get_val():

问题 In my Angular 2 app I am using string interpolation to pull data from a mongoDB. Right now the server/database in in flux, so on occasion that will break my client-side display because, for instance, if I am pulling in data via string interpolation, like this: {{record.addresses[0].zipCode}} ... and then, at a later time, the way the data is organized in the database changes, this will break my display - because the client is trying to pull in from fields that are no longer there. So I think

问题 In a nutshell: """I want to be able to |have the convenient formatting of a multiline string, |while using inline escape sequences\r\r\b\\ | |How can this be done?""".stripMargin 回答1: Two options that I can think of: You can use StringContext.treatEscapes directly: StringContext.treatEscapes("""I want to be able to |have the convenient formatting of a multiline string, |while using inline escape sequences\r\r\b\\ | |How can this be done?""".stripMargin) If the variable substitution feature of

问题 We would like to maintain the emails that are sent from our ASP.NET Web Application in a database. The idea was that the format of emails are stored in a database. The problem is that emails should include order specific information, e.g.: Thank you for your order John Smith, your order 1234 has been received What I'm trying to achieve is that I have used string verbatims in the database column values where it would be stored like this: Thank you for your order {o.customer}, your order {o.id}

问题 I need to build up long command lines in R and pass them to system() . I find it is very inconvenient to use paste0/paste function, or even sprintf function to build each command line. Is there a simpler way to do like this: Instead of this hard-to-read-and-too-many-quotes: cmd <- paste("command", "-a", line$elem1, "-b", line$elem3, "-f", df$Colum5[4]) or: cmd <- sprintf("command -a %s -b %s -f %s", line$elem1, line$elem3, df$Colum5[4]) Can I have this: cmd <- buildcommand("command -a %line