syntax-error

问题 I am trying to print a 2D matrix with using [] , instead I want to use * like a pointer. So with a 1 D array I'd do: *(arr+i) for example. What's the syntax used to replace in matrix[][] ? Here's the code: for (i = 0; i < size; i++) { for (j = 0; j < (size * 2); j++) { printf(" %5d", matrix[i][j]); } printf("\n"); } P.S, I did try several things like: *(matrix+i+j); *(matrix+i)+*(matrix+j); Of course none of that worked. Thank you for your help and time! 回答1: This may depend on how matrix was

问题 When running my gulp task, I get the following error: SyntaxError in plugin "gulp-babel" Message: /Users/******/Repos/******/src/scripts/config/index.js: Unexpected export specifier type > 1 | export * as constants from './constants'; ^^^^^^^^^^^^^^ I'm not sure why this is as I am running the required plugins to allow ES6 imports/exports, or so I thought... .babelrc { "presets": [ "@babel/preset-env", "@babel/preset-react" ], "plugins": [ "add-module-exports", "@babel/plugin-transform

问题 I have a list of dict1.keys() I'm enumerating over and I'd like to use the element as a string. for i,j in enumerate(dict1.keys()): str(j) = somethingElse >>> SyntaxError: can't assign to function call https://dbader.org/blog/python-enumerate describes the enumerate entities as a tuple of: (index, element). The type(j) is <class 'str'> , which I can print, but not use as a variable. EDIT: for i,j in enumerate(dict1.keys()): j = somethingElse EDIT2: I think the problem may be with pandas. The

问题 I would like to parse sentences in propositional logic using BNFC. I wrote the following BNF grammar to facilitate this: Negation. N ::= "(" "-" L")"; Conjuction. C ::= "(" L "&" L ")"; Disjuction. D ::= "(" L "|" L ")"; Implication. I ::= "(" L "=>" L ")"; Equivalence. E ::= "(" L "<=>" L ")"; Atom. L ::= Ident | N | C | D | I | E ; However, with this construction I get the following error: syntax error at line 6, column 27 before `|' What is syntactically incorrect about the specification I

问题 This question already has answers here : How do I create a variable number of variables? (14 answers) Closed 14 days ago . In a different question I tried to use an enumerate and for element to create a pandas dataframe using the element as the name. It turns out the problem is more general. Is there anyway to set a variable value using something other than a plain string? In Bash this is done with the Read command, which takes the previous output into a subshell and assigns it to a variable

问题 I'm trying to write a python script that requires a connection to firebase. I've installed the python-firebase package, but when I import it into my program using 'import firebase', I get the following error: Traceback (most recent call last): File "C:\Users\hajel\AppData\Local\Programs\Python\Python37-32\Scripts\RFIDHandler.py", line 1, in <module> import firebase File "C:\Users\hajel\AppData\Local\Programs\Python\Python37-32\lib\site-packages\firebase\__init__.py", line 3 from .async import

问题 I started using a ContextThemeWrapper to apply a style dynamically to an ImageButton ; based an answer to another question of mine, and answers to other similar questions. ContextThemeWrapper wrapper = new ContextThemeWrapper(getContext(), mStyleRes); mImageButton = new AppCompatImageButton(wrapper, null, 0); But recently a lint error started appearing on the ContextThemeWrapper constructor stating: ContextThemeWrapper can only be called from within the same library group (groupId=com.android

问题 I started using a ContextThemeWrapper to apply a style dynamically to an ImageButton ; based an answer to another question of mine, and answers to other similar questions. ContextThemeWrapper wrapper = new ContextThemeWrapper(getContext(), mStyleRes); mImageButton = new AppCompatImageButton(wrapper, null, 0); But recently a lint error started appearing on the ContextThemeWrapper constructor stating: ContextThemeWrapper can only be called from within the same library group (groupId=com.android

问题 I started using a ContextThemeWrapper to apply a style dynamically to an ImageButton ; based an answer to another question of mine, and answers to other similar questions. ContextThemeWrapper wrapper = new ContextThemeWrapper(getContext(), mStyleRes); mImageButton = new AppCompatImageButton(wrapper, null, 0); But recently a lint error started appearing on the ContextThemeWrapper constructor stating: ContextThemeWrapper can only be called from within the same library group (groupId=com.android

问题 I'm getting the error in SMLNJ: Error: syntax error found at EOF what does this means? The function that seems to be causing the error is the following. fun number_in_month (dates : int*int*int list, month : int) = if null dates then 0 else if #2 (hd dates) = month then number_in_month(tl dates, month) + 1 It is supposed to take a list of dates ( int*int*int list) and a month ( int ) and returns how many dates in the list are in the given month. Thanks for your kind help. 来源： https:/