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How is “int main(){(([](){})());}” valid C++?
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The code essentially calls an empty lambda.
Let's start from the beginning: [](){} is an empty lambda expression.
Then, in C and C++, you can wrap expressions in parens and they behave exactly the same† as if written without them, so that's what the first pair...
Why does a RegExp with global flag give wrong results?
What is the problem with this regular expression when I use the global flag and the case insensitive flag? Query is a user generated input. The result should be [true, true].
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What's the point of 'const' in the Haskell Prelude?
...l for passing to higher-order functions when you don't need all their flexibility. For example, the monadic sequence operator >> can be defined in terms of the monadic bind operator as
x >> y = x >>= const y
It's somewhat neater than using a lambda
x >> y = x >>= \_...
Why use static_cast(x) instead of (int)x?
I've heard that the static_cast function should be preferred to C-style or simple function-style casting. Is this true? Why?
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How to export query result to csv in Oracle SQL Developer?
.... Trying to figure out how to export a query result to a text file (preferably CSV). Right clicking on the query results window doesn't give me any export options.
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Clojure: reduce vs. apply
I understand the conceptual difference between reduce and apply :
9 Answers
9
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Git Push error: refusing to update checked out branch
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Reason:You are pushing to a Non-Bare Repository
There are two types of repositories: bare and non-bare
Bare repositories do not have a working copy and you can push to them. Those are the types of repositories you get in Github! If you want to create a ba...
How do I undo the most recent local commits in Git?
I accidentally committed the wrong files to Git , but I haven't pushed the commit to the server yet.
86 Answers
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Break promise chain and call a function based on the step in the chain where it is broken (rejected)
...rOne)
.then(stepThree, handleErrorTwo)
.then(null, handleErrorThree);
To better understand what's happening, let's pretend this is synchronous code with try/catch blocks:
try {
try {
try {
var a = stepOne();
} catch(e1) {
a = handleErrorOne(e1);
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slf4j: how to log formatted message, object array, exception
What is the correct approach to log both a populated message and a stack trace of the exception?
2 Answers
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