how to convert string to variable name in c#

Using locals() function to Convert a Python string to a Variable Name, 3. The lambda function tests whether the value of the tested variable is the same as the value of the variable passed to variablename(). Who are you scolding and why? I have a list of strings: "str1", "str2", "str3", etc. The most obvious alternative to what you request is a dictionary. If it does exist in the struct list it will conditionally find() it and its stored value or assign its value depending on what your program has it designed to do. Since there are double quotes I'm unable to convert it. converting a variable name to a string in C++ - Stack Overflow If a question is poorly phrased then either ask for clarification, ignore it, or. I will suggest a slightly simpler, albeit maybe not as efficient solution. This is my first question in Stack Overflow. Understand that English isn't everyone's first language so be lenient of bad the TLDR states that it's not possible to achieve what has been asked by the OP. Does Pre-Print compromise anonymity for a later peer-review? How to convert a string to a variable name? How do precise garbage collectors find roots in the stack? How to return a variable name and assign the value of the variable returned in c, To quote Wichert, 'I suggest that you reconsider the problem you are trying to solve and check if there might not be a better method to approach it. It makes no difference to the object what names, if any, it might be bound to. See this answer on how to convert a C++ variable name into an string. You could filter out system variables like this, but you're still going to get all of your own items. A bit late to the party, but I hope this can help anyone out there! I am having a hard time seeing what I am doing wrong with a program I Now consider: varname. The print function would need the variable names in string form. Early binding, mutual recursion, closures. This is true for interactive language environment, and not true for compiled languages like C++ or Java. I'm sure there are some mistakes, but high level I believe this should work. Tobias worked on several Interpreters in fact. rev2023.6.27.43513. spelling and grammar. It will make your code tough to understand. what do you mean by "used in another macro" ? You need to duplicate the globals dictionary since its size will change as soon as you define a new variable. The next Access Europe meeting will be on Wednesday 7 June 2023 starting at 18:00 UK time (6PM UTC+1) and finishing at about 19:15 (7.15PM) Because argument_data identifier name is not available in the random_function()'s namespace, this would yield instead: Now, consider the hypotetical usage of a get_indentifier_name_missing_function() which would behave as described above. To get it called properly, I put it inside a list comprehension [tpl[0] for tpl globals().items())]. There is no way to know which name is the "correct" one. To declare an int variable in C++ you need to first write the data type of the variable - int in this case. Beginning programmers ask this question regarding every language. How to properly align two numbered equations? the current scope. dt_stat_report_3b.Columns.Add(New DataColumn("Sum", OK guys, this is my first real attempt at VB. Try it Yourself Loop Through a String Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Did Roger Zelazny ever read The Lord of the Rings? There are multiple ways to convert a string to a variable name. It might be bound to dozens of different names, or none. Write a code for Debugging - print variable name with their values #include <stdio.h> #define printDebug (x) printf ("\nvalue of \"%s\" is: %d\n", #x, x); int main () { int value1; int value2; value1 = 10 ; value2 = 20 ; printDebug (value1); printDebug (value2); return 0 ; } Output: value of "value1" is: 10 value of "value2" is: 20 I'm having trouble in converting the string "Hello" into a variable name. I.e. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Are Prophet's "uncertainty intervals" confidence intervals or prediction intervals? So this code returns a list of possible variables. also running Exchange 2003) all locally. First, we need to get the name of the modules that are currently loaded in the program. Here is one way, please check the sample code I have written. Just running that code above created another variable "k" that changed the position of "x" in the dict. We'll pass either a number or a variable into the parentheses of the method and then that numeric value will be converted into a string value. To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page. Can wires be bundled for neatness in a service panel? Let say that the selected item is "a" Now my purpose is to use the value "a" (or "b" or "c") as variable name, so some function GetVarFromString ("a") returns "hallo". Basically Python uses one C variable named tok to name them all. This can be achieved by passing both the 'string' and eval('string') to the called function at the same time. It is used by most developers which accounts for its popularity. I'm having trouble in converting the string "Hello" into a variable name. A string variable contains a collection of characters surrounded by double quotes: Example Get your own C# Server Create a variable of type string and assign it a value: string greeting = "Hello"; Try it Yourself A string variable can contain many words, if you want: Example string greeting2 = "Nice to meet you!"; Try it Yourself String Length AssertionError: 'something_else' must be a number greater than 5. Can I have all three? An empty string (like "") converts to 0. Temporary policy: Generative AI (e.g., ChatGPT) is banned, How to combine values of Variables into a string in C, Converting String literal to variable name. This is pretty cool, but quite as automatic as I would like. Making statements based on opinion; back them up with references or personal experience. Combining every 3 lines together starting on the second line, and removing first column from second and third line being combined. http://msdn.microsoft.com/en-us/library/5tbh8a42(v=vs.110).aspx, How to assign value same variable name in base class and derived class C# pin. This will work for simnple data types (str, int, float, list etc.). We bake the variables in at compile-time, so all that's left to do at runtime is fill them in. length list of input data (item# & item quantity specifically). It only works if the random_function() can resolve the 'argument_data' string to an actual identifier. At last, we have printed the input string and see if the string contains a variable name or not. 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There are 5 significant methods to convert strings to numbers in C++ as follows: Using stoi () function Using atoi () function Using stringstream Using sscanf () function Using for Loop Using strtol () function 1. The method globals().items() returns a list of tuples; in each tuple the first item is the variable name (as a string) and the second is the variable value. since TRACE(Hello) is used in another macro am using as TRACE(("Hello")) and more over , can use printf function. I will use UTHASH, but there are certainly other ways. in Latin? After creating the string with placeholders, we will invoke the format() method on myTemplate with myStr as the first input argument and the value for the variable created from myStr as the second input argument. How does "safely" function in "a daydream safely beyond human possibility"? It would only see the a_dictionary_object identifier name. I would like suggestions or code examples on how to collect a variable There are three ways in which you can convert int to string c++. Converting the value of a dtatable from a string to a Double, converting old app to VB - strange INPUT behavior, ObjectDataSource & GridView for variable length input lists, Converting HTML to XHTML (JTidy,OpenXML,Xerces), Help with C++ program converting PBM (p4) to PPM (p5), One of the easiest ways to set the background color of Excel documents in Java, The next Access Europe meeting is on Wed 7 June - Northwind 2.0 Developer Edition Inventory and String functions, Join our open community on Discord to learn programming, SEO, and marketing, Mastering Python: A Versatile Programming Language for All, How to deploy AntDB Community Version on a virtual machine on VMware WorkstationP3, How to send live message and notification to all the Access Database frontend users, cout<<"Pleaseenterthenameofthestructure". After a little bit of experimentation I created following macros that convert names of variables, fields, functions, methods and types to strings. You get to query an object for an interface (struct) by name and if the object supports that struct, you get a pointer to it. After that, we need to find the module that is currently being executed, i.e. Hope this will help someone else: The original question is pretty old, but I found an almost solution with Python 3. programs since 1998. After that, we will create a string myTemplate in the format {} = {}. you can find the answer below : If any changes can be done in this code, kindly let me know. Asking for help, clarification, or responding to other answers. Not the answer you're looking for? I have been running CDONTS in my ASPpages to send emails to me sent from my If you tell us what you want this capability for, more helpful information could possibly be given. In this example, we will have a variable named by us and an input string. The list comprehension saves only the variable name tpl[0], ignoring the variable value. We will then be applying the exec() method with some modifiers and trying to convert a string into a variable name. Convert a String to Variable Name in Python | Delft Stack How many ways are there to solve the Mensa cube puzzle? Using globals() function to Convert a Python string to a Variable Name, Pros and cons of creating Global variables in python, How to Check if the Variable Exists in Python, Numpy Permutation() | How to use np.random.permutation(), Working With Carriage Return (\r) in Python, Firstly, we have taken an input string in str as. Here the user can typecast the result to make it of a particular data type. theory: variables are places in memory where we store data, identified by a name, we can store data in a text file if processor doesnot allow us to store it in registers, and we can access its value by searching its identity (name of variable) int the text file, our data will be next to it. rev2023.6.27.43513. When the operand is a type or a namespace, the produced name isn't fully qualified. Can I have all three? @w.jayson You should search for "c variadic macros" if that is what you need. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. This could be an efficient, built-in function. if you want to give strings in runtime then pre-processor tricks will not work. Is there an extra virgin olive brand produced in Spain, called "Clorlina"? Multiple Ways With Examples to Convert a Python string to a Variable Name, 1. We will discuss all of them in this article. There might be some clever way to hack the Python bytecodes or something to get the value of the name, but that is at best a parlor trick. How to assign a String to a variable in C. How to convert a string to variable name using macro? etc. The operation is evaluated at compile-time, which means that you can rename, using an IDE's rename feature, a referenced identifier and the name string will update with it. It is a real pleasure to read a post that answers the question without ranting about why the question is being asked. What's the correct translation of Galatians 5:17. But this example is crystal clear: the same object is bound to foo, bar, and baz. Making statements based on opinion; back them up with references or personal experience. Can I correct ungrounded circuits with GFCI breakers or do I need to run a ground wire? You can't convert a string into a variable as such, because variables are part of your code, not of your data. much earlier) For example assume I have two vectors of doubles: is there an easy way to output this to a file so that the first row contains the headings 'data1' and 'data2' followed by the actual contents. So just before I show you the way to use string value as variable I ask you to consider using name-value pairs to get value according to key My 5. c string stringify stringification Share Improve this question If it is arbitrary amounts of data, naming each part of it won't do you any good, because it has to be done by hand anyway. What you really want instead is the ability to associate a name with an object at runtime, so that code -- not people -- can use that name to find the object. i'm having different type of opertors like value3 / value2 * value8 / (36 * 840) * value7/ (2.2046 * value6) by dynamically reading that string calculate ya its too simple with simple calculations But my calculate expression is string calculate =" value3 / value2 * value8 / (36 * 840) * value7/ (2.2046 * value6) * value7" actually need to compute double result = convert.Todouble(calculate); Converting string to variable name [duplicate], The cofounder of Chef is cooking up a less painful DevOps (Ep. Actually my return to writing How to convert Int to String in C++ - Great Learning varname = genvarname (str, exclusions) returns a valid variable name that is different from any name listed in the exclusions input.

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