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What is a Context Free Grammar?
... then the Wikipedia entry on formal grammar, I am left utterly and totally befuddled. Would someone be so kind as to explain what these things are?
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What does the restrict keyword mean in C++?
...t while restrict is not part of the C++ standard yet, that it is supported by many compilers and he recommends it's usage when available:
restrict keyword
! New to 1999 ANSI/ISO C standard
! Not in C++ standard yet, but supported by many C++ compilers
! A hint only, so ...
How to initialize HashSet values by construction?
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There is a shorthand that I use that is not very time efficient, but fits on a single line:
Set<String> h = new HashSet<>(Arrays.asList("a", "b"));
Again, this is not time efficient since you are constructing an array, converting to a list and using that list to create a set...
How to split a string, but also keep the delimiters?
I have a multiline string which is delimited by a set of different delimiters:
23 Answers
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Merge 2 arrays of objects
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If you want to merge 2 arrays of objects in JavaScript. You can use this one line trick
Array.prototype.push.apply(arr1,arr2);
For Example
var arr1 = [{name: "lang", value: "English"},{name: "age", value: "18"}];
var arr2 = [{name : "childs", value: '5'}...
Check if a string is html or not
...hich I want to check if it is a html or not. I am using regex for the same but not getting the proper result.
13 Answers
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Meaning of “[: too many arguments” error from if [] (square brackets)
...ightforward resource spelling out the meaning of and fix for the following BASH shell error, so I'm posting what I found after researching it.
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What is this weird colon-member (“ : ”) syntax in the constructor?
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It's a member initialization list. You should find information about it in any good C++ book.
You should, in most cases, initialize all member objects in the member initialization list (however, do note the exceptions listed at the e...
What's the difference between a Python module and a Python package?
What's the difference between a Python module and a Python package?
5 Answers
5
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Default value of function parameter
...te .cpp file, and #include the header from a different .cpp file, you will be able to see the difference.
Specifically, suppose:
lib.h
int Add(int a, int b);
lib.cpp
int Add(int a, int b = 3) {
...
}
test.cpp
#include "lib.h"
int main() {
Add(4);
}
The compilation of test.cpp will...