VSCode Javascript error for string out of bounds











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I have the following code:



let strA = "0124356789";



let strB = strA.substr(8,3);



console.log(strB);


(I know substr is discouraged, however this is legacy code I need to work with)



Right now VS Code will not complain and will just return strB = 89. I want to get a warning at least that I've tried to reach more chars than there's in strA.



I guess I could write tests that would assert that the length is what is supposed to be, however I'm looking for a simpler solution.






javascript visual-studio-code stringindexoutofbounds







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  • I think writing your own assertion would be the way to go.
    – Alex Leo
    Nov 8 at 12:04















up vote
0
down vote

favorite
1












I have the following code:



let strA = "0124356789";



let strB = strA.substr(8,3);



console.log(strB);


(I know substr is discouraged, however this is legacy code I need to work with)



Right now VS Code will not complain and will just return strB = 89. I want to get a warning at least that I've tried to reach more chars than there's in strA.



I guess I could write tests that would assert that the length is what is supposed to be, however I'm looking for a simpler solution.






javascript visual-studio-code stringindexoutofbounds







share|improve this question






















  • I think writing your own assertion would be the way to go.
    – Alex Leo
    Nov 8 at 12:04













up vote
0
down vote

favorite
1









up vote
0
down vote

favorite
1






1





I have the following code:



let strA = "0124356789";



let strB = strA.substr(8,3);



console.log(strB);


(I know substr is discouraged, however this is legacy code I need to work with)



Right now VS Code will not complain and will just return strB = 89. I want to get a warning at least that I've tried to reach more chars than there's in strA.



I guess I could write tests that would assert that the length is what is supposed to be, however I'm looking for a simpler solution.






javascript visual-studio-code stringindexoutofbounds







share|improve this question













I have the following code:



let strA = "0124356789";



let strB = strA.substr(8,3);



console.log(strB);


(I know substr is discouraged, however this is legacy code I need to work with)



Right now VS Code will not complain and will just return strB = 89. I want to get a warning at least that I've tried to reach more chars than there's in strA.



I guess I could write tests that would assert that the length is what is supposed to be, however I'm looking for a simpler solution.






javascript visual-studio-code stringindexoutofbounds




javascript visual-studio-code stringindexoutofbounds






share|improve this question













share|improve this question











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asked Nov 8 at 11:50









Ne Nenne

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5117












  • I think writing your own assertion would be the way to go.
    – Alex Leo
    Nov 8 at 12:04


















  • I think writing your own assertion would be the way to go.
    – Alex Leo
    Nov 8 at 12:04
















I think writing your own assertion would be the way to go.
– Alex Leo
Nov 8 at 12:04




I think writing your own assertion would be the way to go.
– Alex Leo
Nov 8 at 12:04

















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