Refers to a non-destructive operation performed on sequential, collection-like data structures that have the notion of "top element" or "next element", such as stacks, queues and streams. The `peek` operation returns the value of the "top" (or "next") element without "consuming" that element, i.e. without removing that element from the data structure.
Questions tagged [peek]
163 questions
0
votes
2 answers
Thumbnail Toolbar Button
Today I have another specific question about a new feature in windows 7 called the thumbnail toolbar or the Aero Peek Toolbar if some might like to call it that way. I have been able to create a new set of toolbar buttons for my application each…
Zaid Amir
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0
votes
1 answer
C 'recv' with MSG_PEEK doesn't return -1
I'm writing a C function to check if a socket connection from client is available. I use 'recv' function with MSG_PEEK not to alter the input buffer.
However, when the socket connection is closed by client, 'recv' is supposed to return -1, but it…
jondinham
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2 answers
How can I use st.peek() function in java if I pushed a pair of elements?
I created a user defined class pair to add two elements in stack. But how can I use peek function of the stack? I want to access the "element" of pair class using peek.
import java.util.*;
public class Example {
public static class pair{
…
CShekhar
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votes
1 answer
Why does cin.peek() == '\n' work for '+' and '-', but not for '*', '/', and '^'?
I'm doing a calculator in replit. Why does my cin.peek() == '\n' work when I enter + and - but it doesn't work when I enter *, /, or ^?
#include
#include
#include
#include
using namespace std;
float…
Hloandgoodbye
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-1
votes
1 answer
How to do peek operation in queue in C?
#include
#include
#include
#define max 100
int enqueue();
int dequeue();
int peek();
void display();
int main()
{
char name[max][80], data[80];
int front, rear, value;
int ch;
front = rear =…
anna
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- 5
-1
votes
1 answer
How Go buffer read data from io.Reader?
I'm learning for Go bufio package, and confused by a code snippet below:
1 s1 := strings.NewReader(strings.Repeat("a", 16) + strings.Repeat("b", 16))
2 r := bufio.NewReaderSize(s1, 16)
3 b, _ := r.Peek(3)
4 fmt.Printf("%q\n", b)
5 …
AchillesHeel
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-1
votes
1 answer
vb.net - r.peek()>=0 line = r.readline()
I am using vb.net to read a text file and see if a record matched, and to pick out that record and write it to excel.
However with the peek loop it reads the file until the end of it. I have 2 peek loop - the outer peek loop looks for the item, the…
Johnseito
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-1
votes
1 answer
Type 'MainVC' does not conform to protocol 'UIViewControllerPreviewingDelegate'
I don't know what I'm doing wrong, but my class MainVC can't conform to the protocol UIViewControllerPreviewingDelegate. I've searched all over the internet but couldn't find a single person who had the same issue.
This is my class:
class MainVC:…
Domenic Wüthrich
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votes
4 answers
Removing the last item from a queue in C#
We have the Enqueue and Dequeue methods to work on a queue in C#.
But is there a way we can remove the last item in the queue? Dequeue actually removes the item from the top.
Slick Guy
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-1
votes
2 answers
Queue unexpectedly puts last element in the front when I call poll()
I have the following code. I'm trying to do a breadth first search of a tree that I created call HabitItem.
Here is queue traveral
import java.io.File;
import java.util.*;
import java.util.concurrent.PriorityBlockingQueue;
public static void…
Cameron
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-1
votes
2 answers
istream operator >> not recognising '\n' character
I am basically reading a .txt file and storing values.
For example:
Student- Mark
Tennis
It will store Mark into memory as the studentName.
Now...If it is just
Student-
Tennis
Then it will work fine and produce an error.
However, if the file…
Sam Thers
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-1
votes
1 answer
How to read a stack.peek in order to put it in an if statement C#
I am trying to create a menu system and i am storing the menus in stacks once they have already been visited. Im trying to use Stack.Peek() to basically say: if menuName = menuStack.Peek, then continue.
menus have a drawRectangle, sprite, and…
user1801067
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-2
votes
2 answers
How to remove and print every item in an IntStack object until it is empty?
I am having trouble figuring out how to remove and print every item in an IntStack object until it is empty. Would I need to use an if statement? I know the basics of stacks, for example:
Suppose s refers to an IntStack object.
If I wanted to add…
Derrik Antrium
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