warnings

问题 I recently faced a bug in a code like this class C { public: // foo return value depends on C's state // AND each call to foo changes the state. int foo(int arg) /*foo is not const-qualified.*/ {} private: // Some mutable state }; C c; bar(c.foo(42), c.foo(43)) The last call behaved differently on different platforms (which is perfectly legal due to undefined order of argument evaluation), and I fixed the bug. But the rest codebase is large and I would like to spot all other UB of this type.

问题 Received below warning from PlayStore, What does it means? Users with version 15 of the APK (targeting 22 version of the SDK or earlier) will perform the update. However, once the update is complete, they will no longer install APK targeting 22 version of the SDK or earlier. Trick If this change is desired, make sure that users doing in the future to update this APK to spend 23 or later. Old Version details : android:minSdkVersion="18" android:targetSdkVersion="19" android:compileSdkVersion=

问题 good evening (and happy thanksgiving), I have the following code (ripped out of my main code into a standalone file) and am getting some warning messages that I'd like to resolve. Here is the code: #include <cassert> #include <ostream> #include <climits> #include <iostream> #include <string> using namespace std; class WordCount { public: // Constructors WordCount() : word(""), count(0) { } WordCount(string theWord, unsigned theCount = 1) : word(theWord), count(theCount) { } // Accessors

问题 good evening (and happy thanksgiving), I have the following code (ripped out of my main code into a standalone file) and am getting some warning messages that I'd like to resolve. Here is the code: #include <cassert> #include <ostream> #include <climits> #include <iostream> #include <string> using namespace std; class WordCount { public: // Constructors WordCount() : word(""), count(0) { } WordCount(string theWord, unsigned theCount = 1) : word(theWord), count(theCount) { } // Accessors

问题 This question already has answers here : warning: return type defaults to ‘int’ [-Wreturn-type] (3 answers) Closed 5 years ago . #include <stdio.h> int w=7,v=0; shortf(short a, short *b) { a++;(*b)++;w++;v++; printf("13: %d %d %d",a,v,w); return a; } int main() { return 0; } This is part of my code. It was given to me by a teacher in my University, but when I write it I get 10+ warnings and errors, this is one of them. I get a " return type defaults to 'int' " warning for Line 4. Why? Note: I

问题 I have a php application that opens a session and sends the appropriate cookie to the browser like normal. Somewhere in the script I want to close the current session, silently open a new one in the background, get some values from this "background session", close it again and resume the main session (the one the user got cookies for). In Debian Stretch having PHP 7.0 the following minimal example worked like a charm but now in PHP 7.3 (Debian Buster) I get several warnings and the example

问题 This question already has an answer here : Suppress any emission of a particular warning message (1 answer) Closed 5 months ago . This plot is great. It has everything I need, and the y=0 value is in a sensible place despite the logarithmic scale. All is great! library(ggplot2) df <- data.frame(x=1:3, y=c(1, 0, 2)) print(ggplot(df, aes(x=x, y=y)) + geom_point() + scale_y_log10()) How can I suppress this warning, and only this warning? Transformation introduced infinite values in continuous y

问题 I'm trying to import a CVS file where I get this warning: 1366 Incorrect string value: '\x96 PART...' for column I read somewhere that this is about the 4-bit utf8 characters. But changing the collation of the table and column into utf8mb4 didn't work either. 回答1: The hex 96 is presumably the latin1 encoding for an en-dash ( – ). But you have specified that the CSV file is utf8-encoded (or utf8mb4), this character is incomprehensible to utf8. Plan A: Change the file. (This is probably not

问题 I'm trying to import a CVS file where I get this warning: 1366 Incorrect string value: '\x96 PART...' for column I read somewhere that this is about the 4-bit utf8 characters. But changing the collation of the table and column into utf8mb4 didn't work either. 回答1: The hex 96 is presumably the latin1 encoding for an en-dash ( – ). But you have specified that the CSV file is utf8-encoded (or utf8mb4), this character is incomprehensible to utf8. Plan A: Change the file. (This is probably not

问题 I am using the R programming language and the "igraph" library. Suppose I have some data and I make this into a undirected graph and perform community detection (graph clustering) # undirected graph library(igraph) my_data <- data.frame( "node_a" = c("Store_A", "Store_A", "Store_A", "Store_B", "Store_B", "Store_C", "Store_C", "Store_C", "Store_C", "Store_C", "Store_B", "Store_C", "customer_4", "customer_9", "customer_1"), "node_b" = c("customer_1", "customer_2", "customer_3", "customer_3",