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Why do we need boxing and unboxing in C#?
...rom the way that reference types represent their underlying data (e.g., an int is just a bucket of thirty-two bits which is completely different than a reference type).
Think of it like this. You have a variable o of type object. And now you have an int and you want to put it into o. o is a referen...
libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...轻松搭建tcpserver1. 基础代码 设置某fd为O_NONBLOCK模式 int set_non_block(int fd); server端socket流程:socket(),setsoc...1. 基础代码
// 设置某fd为O_NONBLOCK模式
int set_non_block(int fd);
// server端socket流程:socket(),setsockopt(),bind(),listen(),set...
PHPMailer character encoding issues
...an use utf8_encode as David says. Otherwise use mb_detect_encoding and mb_convert_encoding on $message.
Also take note that
$mail -> charSet = "UTF-8";
Should be replaced by:
$mail->CharSet = 'UTF-8';
And placed after the instantiation of the class (after the new). The properties are ...
What's the optimum way of storing an NSDate in NSUserDefaults?
...
You are needlessly complicating things. Why are you converting the date to a time interval (then the time interval to a different primitive)? Just [sharedDefaults setObject:theDate forKey:@"theDateKey"] and be done with it. NSDate is one of the "main types" supported by the PL...
When to use %r instead of %s in Python? [duplicate]
...
The %s specifier converts the object using str(), and %r converts it using repr().
For some objects such as integers, they yield the same result, but repr() is special in that (for types where this is possible) it conventionally returns a re...
What's the difference between integer class and numeric class in R
...ouble precision floating point numbers) and integer. R will automatically convert between the numeric classes when needed, so for the most part it does not matter to the casual user whether the number 3 is currently stored as an integer or as a double. Most math is done using double precision, so ...
How to view files in binary from bash?
...comfortable with hex just locate the bytes in which you are interested and convert them using a hex calculator.
– Duck
Nov 19 '09 at 18:38
3
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What does int argc, char *argv[] mean?
...s are passed to main() in C and C++.
argc will be the number of strings pointed to by argv. This will (in practice) be 1 plus the number of arguments, as virtually all implementations will prepend the name of the program to the array.
The variables are named argc (argument count) and argv (argume...
Declaring pointers; asterisk on the left or right of the space between the type and name? [duplicate
...of code. (This applies to C and C++, by the way.) People seem to declare pointers in one of two ways, and I have no idea which one is correct, of if it even matters.
...
Live character count for EditText
... new TextWatcher() {
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
//This sets a textview to the current length
mTextView.setText(String.v...