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Handling warning for possible multiple enumeration of IEnumerable
...e semantic missing here is that a caller, who perhaps doesn't take time to read the details of the method, may assume you only iterate once - so they pass you an expensive object. Your method signature doesn't indicate either way.
By changing the method signature to IList/ICollection, you will at ...
What does the comma operator , do?
...
I've seen used most in while loops:
string s;
while(read_string(s), s.len() > 5)
{
//do something
}
It will do the operation, then do a test based on a side-effect. The other way would be to do it like this:
string s;
read_string(s);
while(s.len() > 5)
{
//do so...
Why is volatile not considered useful in multithreaded C or C++ programming?
...o be confused about the utility (or lack thereof) of volatile in multi-threaded programming contexts.
9 Answers
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How to write to file in Ruby?
I need to read the data out of database and then save it in a text file.
7 Answers
7
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Set a default parameter value for a JavaScript function
...S6/ES2015, default parameters are in the language specification.
function read_file(file, delete_after = false) {
// Code
}
just works.
Reference: Default Parameters - MDN
Default function parameters allow formal parameters to be initialized with default values if no value or undefined is ...
What's the difference between a file descriptor and file pointer?
... systems.
You pass "naked" file descriptors to actual Unix calls, such as read(), write() and so on.
A FILE pointer is a C standard library-level construct, used to represent a file. The FILE wraps the file descriptor, and adds buffering and other features to make I/O easier.
You pass FILE pointe...
How to run a python script from IDLE interactive shell?
...
Python3:
exec(open('helloworld.py').read())
If your file not in the same dir:
exec(open('./app/filename.py').read())
See https://stackoverflow.com/a/437857/739577 for passing global/local variables.
In deprecated Python versions
Python2
Built-in functi...
C++ Const Usage Explanation
...
Read this: https://isocpp.org/wiki/faq/const-correctness
The final const means that the function Method3 does not modify the non mutable members of its class.
const int* const means a constant pointer to a constant int: i.e...
How to get IP address of the device from code?
...
This is my helper util to read IP and MAC addresses. Implementation is pure-java, but I have a comment block in getMACAddress() which could read the value from the special Linux(Android) file. I've run this code only on few devices and Emulator but le...
How do I read any request header in PHP
How should I read any header in PHP?
15 Answers
15
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