parameter-passing | 易学教程

Bare forward slash in Python function definition? [duplicate]

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问题 This question already has answers here : Python: What does the slash mean in help() output? (2 answers) What is the meaning of a forward slash “/” in a Python method signature, as shown by help(foo)? [duplicate] (1 answer) Closed 6 months ago . In the Python 3.8 Programming FAQ, I saw the following function definition: class callByRef: def __init__(self, /, **args): for key, value in args.items(): setattr(self, key, value) This is missing in the Python 3.7 version: class callByRef: def __init

How do I pass HTML form data to apps script variable?

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I am having a hard time assigning variables to data that I collect in an HTML form for use in Apps Script. My current code collects values from HTML and appends the data to a row in a Google Sheet. What I would like to also do is assign each form value to a variable so I can send automated emails, etc... What I know so far... The HTML and script works, it collects values from the form and sends them to code.gs function addData starts as expected as the values are transferred The form data is appended to the Google Sheet Both Code.gs loggers "Confirm received data" and "Received data" log the

Send arguments to gulp task

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问题 There are other questions on stackoverflow about this topic, but not the one I was hoping for. Here is a simplified version of my gulpfile.js var gulp = require('gulp'); var sass = require('gulp-sass'); gulp.task('css', function() { gulp.src('site/scss/style.scss') .pipe(sass()) .pipe(gulp.dest('assets/css')) }); gulp.task('watch', function() { gulp.watch('site/scss/**/*.scss', ['css']); }); I can do this successfully: gulp watch Now I want to be able to do something like this in my terminal

Can't pass a script block as a parameter to powershell.exe via -Command

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问题 I'm trying this $Global:commandBlock={ Start-Transcript -path $projectFolder\gruntLog.txt; grunt $argList; Stop-Transcript } $cmdProc=start-process powershell -ArgumentList ('-command `$Global:commandBlock') -WorkingDirectory $fwd -PassThru -NoNewWindow:$NoNewWindow And keep getting $commandBlock : The term '$Global:commandBlock' is not recognized as the name of a cmdlet, function, script file, or operable program. My guess was it has to do with scope. But making variable global didn't help.

how to pass method name as a parameter in python class

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问题 This is my code, my intention is to pass the method name as a parameter when I initialize the object and I want to run the method 'num' (second argument) of times. Basically get n number of results (as mentioned in 2nd argument). class Foo(object): faker = Faker() def __init__(self, custom_method, num=1): self.values = [] self.custom_method = custom_method self.num = num for x in self.num: self.custom_method = self.values.append(custom_method) def random_first_name(self): self.custom_method =

Create and pass SYS_REFCURSOR as an input parameter to Oracle procedure from Java

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I have to communicate with an external Oracle procedure that has a SYS_REFCURSOR as an input parameter: procedure merge_objects(p_table_name in varchar2, p_id_array in varchar2, p_cur_data in SYS_REFCURSOR) I need to pass SYS_REFCURSOR parameter based on the data that I receive from a client . Is there any way to create such parameter in Java? It is possible to do something like this, but it's a bit fiddly. I've come up with two ways to do this, but both of them rely on being able to create objects in the database. I appreciate you might not have permission to do this. The bottom line is that

Restlet, An example of a get with parameters

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Just startred using restlet with java and was pleasently surprised how easy it was. However this was with puts. I then started to work with get but couldn't work out how to pass infromation with the get. With the put it was easy as: @Put public Boolean store(Contact contact); But when i try and do this with get it doesnt work. From reading around i think i have to not pass it any parameters and just have this: @Get public Contact retrieve(); and then pass the parameters in a url or something? But i cant find any info on how to do this. As with put i could just use: resource.store(user1); Any

Correct usage of `for_each_arg` - too much forwarding?

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问题 I'm really happy to have discovered for_each_arg(...), which makes dealing with argument packs much easier. template<class F, class...Ts> F for_each_arg(F f, Ts&&...a) { return (void)initializer_list<int>{(ref(f)((Ts&&)a),0)...}, f; } I'm, however, confused on its correct usage. There are many arguments that need to be perfectly forwarded, but am I performing any unnecessary forwarding? Reading the code becomes harder with excessive fowarding. struct UselessContainer { // Expects a perfectly

In Bash, is there a way to expand variables twice in double quotes?

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问题 For debugging my scripts, I would like to add the internal variables $FUNCNAME and $LINENO at the beginning of each of my outputs, so I know what function and line number the output occurs on. foo(){ local bar="something" echo "$FUNCNAME $LINENO: I just set bar to $bar" } But since there will be many debugging outputs, it would be cleaner if I could do something like the following: foo(){ local trace='$FUNCNAME $LINENO' local bar="something" echo "$trace: I just set bar to $bar" } But the

In C++, are changes to pointers passed to a function reflected in the calling function?

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If I pass a pointer P from function f1 to function f2, and modify the contents of P in f2, will these modifications be reflected in f1 automatically? For example, if I need to delete the first node in a linked list: void f2( Node *p) { Node *tmp = p; p = p -> next; delete tmp; } Will the changes made to P be reflected in the calling function, or will it now point to a memory space that has been deallocated? ( My intuitive answer here is no, changes are not reflected. However, good sources tell me that the above code will work. Can someone take the time to give the answer and explain the