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Undefined, unspecified and implementation-defined behavior
...e in a predictable way, even though many C++ compilers will not report any errors in the program!
Let's look at a classic example:
#include <iostream>
int main()
{
char* p = "hello!\n"; // yes I know, deprecated conversion
p[0] = 'y';
p[5] = 'w';
std::cout << p;
}
The...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...ol Buffers always explicitly encodes fields by numbers, and it is never an error at the library level if there are extra fields, and missing fields are not an error if they are marked optional or explicit. Thus all protocol buffers messages have EXTENSIBILITY IMPLIED.
– Kevin C...
How to use Git Revert
...t is still confusing people (like me)
As a beginner, after some trial and error (more errors than trials) I've got an important point:
git revert requires the id of the commit you want to remove keeping it into your history
git reset requires the commit you want to keep, and will consequentially...
When does invoking a member function on a null instance result in undefined behavior?
...mplies. The rationale says that it should be allowed because "*p is not an error when p is null unless the lvalue is converted to an rvalue." However, that relies on the concept of an "empty lvalue," which is part of the proposed resolution to CWG defect 232, but which has not been adopted. So, wit...
Have Grunt generate index.html for different setups
...Pattern, destPath) {
if (srcPattern === undefined) {
throw new Error("srcPattern undefined");
}
if (destPath === undefined) {
throw new Error("destPath undefined");
}
return grunt.util._.reduce(
grunt.file.expandMapping(srcPattern, destPath, {
...
Detach (move) subdirectory into separate Git repository
... you can't "push" deletes to GitHub and the like. If you try you'll get an error and you'll have to git pull before you can git push - and then you're back to having everything in your history.
So if you want to delete history from the "origin" - meaning to delete it from GitHub, Bitbucket, etc - yo...
Why is it necessary to set the prototype constructor?
...TE: Much edited as my previous answer was confusingly written and had some errors that I missed in my rush to answer. Thanks to those who pointed out some egregious errors.
Basically, it's to wire subclassing up correctly in Javascript. When we subclass, we have to do some funky things to make sure...
What is the difference between Ruby 1.8 and Ruby 1.9
...
{"a","b"} No Longer Supported
Ruby 1.9
irb(main):002:0> {1,2}
SyntaxError: (irb):2: syntax error, unexpected ',', expecting tASSOC
Ruby 1.8.6
irb(main):001:0> {1,2}
=> {1=>2}
Action: Convert to {1 => 2}
Array.to_s Now Contains Punctuation
Ruby 1.9
irb(main):001:0> [1,...
How can I view the source code for a function?
...y the partial signature
getMethod("extract",signature="SpatialPolygons")
#Error in getMethod("extract", signature = "SpatialPolygons") :
# No method found for function "extract" and signature SpatialPolygons
Functions that call unexported functions
In the case of ts.union, .cbindts and .makeNa...
Insert code into the page context using a content script
...nclude:
"web_accessible_resources": ["script.js"],
If not, the following error will appear in the console:
Denying load of chrome-extension://[EXTENSIONID]/script.js. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.
Metho...