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'colon' and 'auto' in for loop c++? need some help understanding the syntax
(3 answers)
Closed 7 months ago.
this is a quick question, Im translating a program that's in C++ to C, and I saw this line of code,
for (int v : adj[u]) {
referenced in this article: link
and I am not really sure what it does. I tried googling it and got results for range based for loops in C++, but cannot find anything that has this exact syntax and what it means. Help would be much appreciated.
It's a very simple for loop that iterates over the elements of adj[u], going 1 by 1.
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How does the Comma Operator work
(9 answers)
Closed 4 years ago.
I was practicing practicing some programming and by mistake wrote the following line of code :
int a,b;
cin>>a,b;
Can anybody explain what the comma does here and why doesn't the compiler show any error.
It means that the whole expression has the value b.
But because b is not initialised the behaviour of your code is undefined!
Modern compilers can warm you of this.
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Kotlin: Why can't I do an assignment in a loop guard?
(4 answers)
Closed 4 years ago.
Greeting, You! I am learning Kotlin and I am struggling to use while loop to get answer from user. Not just that, if you could help explain how to use while loop to me, I would be really appreciate and thanks in advance.
You should use while(ans == 'Y').
In condition checking you should make use of == to check equality
And also in order to get repeated input put the readLine statement inside while loop.
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Regex to match repeated characters
(3 answers)
Closed 6 years ago.
I am having a hard time with Go's regex. It seems it's different than other language, can someone help me on this.
Obj. I want MustCompile to find all repeated characters in the string.
APPLE (where P's repeating)
re := regexp.MustCompile("(\\w)\\${1}\\+")
Above is what I have tried but didn't work at all. Basically I wanted to do:
([A-Za-z])\1+
Can someone tell me what I am doing wrong?
Example below:
https://play.golang.org/p/DeuaIva968
Apparently Golang doesn't supposed back referencing due to efficiency. :(
Thank you everyone for your help.
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What does "for(;;)" mean?
(5 answers)
Closed 7 years ago.
Simple question: I've been looking over boost's asio library, and keep coming across code like this.
for(;;){
//something
}
There's an example of this here.
Can anyone elaborate as to what using ";;" within a for loop does? I can't seem to understand it.
Its a simple infinite loop syntax, a complete code looks like this
for(<initialize>; <condition>; <increment/decrement>) {
<body>
}
Those I labelled with '< .. >' are optional.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
What algorithm gives suggestions in a spell checker?
What algorithm should be used in a C++ program whose aim is to read from a text file and give suggestions for the wrong spelled words ?
Use the Levenshtein distance:
http://thetechnofreak.com/technofreak/levenshtein-distance-implementation-c/
http://murilo.wordpress.com/2011/02/01/fast-and-easy-levenshtein-distance-using-a-trie-in-c/