static

问题 I have successfully deployed my django project on heroku but my project is not looking as it looks on local server due to static files i guess. I am using django 3.1.4. And having issues with version control. here what its look on local : here what its look on server : settings.py: STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage' STATIC_ROOT = BASE_DIR / 'staticfiles' STATIC_URL = '/static/' STATICFILES_DIRS = [ BASE_DIR / "static", '/var/www/static/', ] if more

问题 I have successfully deployed my django project on heroku but my project is not looking as it looks on local server due to static files i guess. I am using django 3.1.4. And having issues with version control. here what its look on local : here what its look on server : settings.py: STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage' STATIC_ROOT = BASE_DIR / 'staticfiles' STATIC_URL = '/static/' STATICFILES_DIRS = [ BASE_DIR / "static", '/var/www/static/', ] if more

问题 I have successfully deployed my django project on heroku but my project is not looking as it looks on local server due to static files i guess. I am using django 3.1.4. And having issues with version control. here what its look on local : here what its look on server : settings.py: STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage' STATIC_ROOT = BASE_DIR / 'staticfiles' STATIC_URL = '/static/' STATICFILES_DIRS = [ BASE_DIR / "static", '/var/www/static/', ] if more

问题 this is hard to explain in text, so I will give an example. //f1.c int a = 5; int main() { printf("func2() output is: %i\n", func2() ); return 0; } //f2.c static int a = 3 int func2() { extern int a; return a; } When I compile and run this, I get 3, while I was expecting 5. Can anyone explain to me why I get 3? I would have thought that by using extern within the function, it wouldn't use the value of the static variable. 回答1: From n1256 §6.2.2 ¶4: For an identifier declared with the storage

问题 this is hard to explain in text, so I will give an example. //f1.c int a = 5; int main() { printf("func2() output is: %i\n", func2() ); return 0; } //f2.c static int a = 3 int func2() { extern int a; return a; } When I compile and run this, I get 3, while I was expecting 5. Can anyone explain to me why I get 3? I would have thought that by using extern within the function, it wouldn't use the value of the static variable. 回答1: From n1256 §6.2.2 ¶4: For an identifier declared with the storage

问题 this is hard to explain in text, so I will give an example. //f1.c int a = 5; int main() { printf("func2() output is: %i\n", func2() ); return 0; } //f2.c static int a = 3 int func2() { extern int a; return a; } When I compile and run this, I get 3, while I was expecting 5. Can anyone explain to me why I get 3? I would have thought that by using extern within the function, it wouldn't use the value of the static variable. 回答1: From n1256 §6.2.2 ¶4: For an identifier declared with the storage

问题 this is hard to explain in text, so I will give an example. //f1.c int a = 5; int main() { printf("func2() output is: %i\n", func2() ); return 0; } //f2.c static int a = 3 int func2() { extern int a; return a; } When I compile and run this, I get 3, while I was expecting 5. Can anyone explain to me why I get 3? I would have thought that by using extern within the function, it wouldn't use the value of the static variable. 回答1: From n1256 §6.2.2 ¶4: For an identifier declared with the storage

问题 I want to assign a value to a global variable, but it keeps having a compiler error: static mut NameArr: [&'static str; 20] = ["\0"; 20]; fn main() { unsafe { static mut S1 :String = "".to_string(); S1.push('\0'); NameArr[0] = S1.as_slice(); } } The error: a.rs:7:29: 7:43 error: mutable statics are not allowed to have destructors a.rs:7 static mut S1 :String = "".to_string(); ^~~~~~~~~~~~~~ a.rs:7:29: 7:43 error: static contains unimplemented expression type [E0019] a.rs:7 static mut S1

问题 I want to assign a value to a global variable, but it keeps having a compiler error: static mut NameArr: [&'static str; 20] = ["\0"; 20]; fn main() { unsafe { static mut S1 :String = "".to_string(); S1.push('\0'); NameArr[0] = S1.as_slice(); } } The error: a.rs:7:29: 7:43 error: mutable statics are not allowed to have destructors a.rs:7 static mut S1 :String = "".to_string(); ^~~~~~~~~~~~~~ a.rs:7:29: 7:43 error: static contains unimplemented expression type [E0019] a.rs:7 static mut S1

问题 I want to assign a value to a global variable, but it keeps having a compiler error: static mut NameArr: [&'static str; 20] = ["\0"; 20]; fn main() { unsafe { static mut S1 :String = "".to_string(); S1.push('\0'); NameArr[0] = S1.as_slice(); } } The error: a.rs:7:29: 7:43 error: mutable statics are not allowed to have destructors a.rs:7 static mut S1 :String = "".to_string(); ^~~~~~~~~~~~~~ a.rs:7:29: 7:43 error: static contains unimplemented expression type [E0019] a.rs:7 static mut S1