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Why must a lambda expression be cast when supplied as a plain Delegate parameter
... Use
var f1 = c(x => x.ToString());
var f2 = c(x => "Hello!");
var f3 = c(x => (x + x).ToString());
}
}
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Shortcut for creating single item list in C#
... The default ends up being 4, I believe: new List<string> { "Hello" }.Capacity == 4
– Jon Skeet
Jan 20 '09 at 20:26
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How do I create a new line in Javascript?
...se the HTML tag for a newline:
document.write("<br>");
The string Hello\n\nTest in your source will look like this:
Hello!
Test
The string Hello<br><br>Test will look like this in HTML source:
Hello<br><br>Test
The HTML one will render as line breaks for the p...
'echo' without newline in a shell script
...as much more consistent behavior. echo is fine for simple things like echo hello, but I suggest using printf for anything more complicated.
What system are you on, and what shell does your script use?
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How to tell if a string contains a certain character in JavaScript?
...
To find "hello" in your_string
if (your_string.indexOf('hello') > -1)
{
alert("hello found inside your_string");
}
For the alpha numeric you can use a regular expression:
http://www.regular-expressions.info/javascript.html
A...
Truncate a string straight JavaScript
...
Yes, substring works great:
stringTruncate('Hello world', 5); //output "Hello..."
stringTruncate('Hello world', 20);//output "Hello world"
var stringTruncate = function(str, length){
var dots = str.length > length ? '...' : '';
return str.substring(0, length)+d...
How to get the return value from a thread in python?
...k to the main thread:
import concurrent.futures
def foo(bar):
print('hello {}'.format(bar))
return 'foo'
with concurrent.futures.ThreadPoolExecutor() as executor:
future = executor.submit(foo, 'world!')
return_value = future.result()
print(return_value)
...
What is stack unwinding?
...k = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, throw exception
}
int main()
{
try
{
func( 10 )...
How to remove duplicate white spaces in string using Java?
...tive same type white spaces with one white space of its type. That is:
Hello!\n\n\nMy World
will be
Hello!\nMy World
Notice there are still leading and trailing white spaces. So my complete solution is:
str = str.trim().replaceAll("(\\s)+", "$1"));
Here, trim() replaces all leadin...
Loop through an array in JavaScript
...ou have several options:
1. Sequential for loop:
var myStringArray = ["Hello","World"];
var arrayLength = myStringArray.length;
for (var i = 0; i < arrayLength; i++) {
console.log(myStringArray[i]);
//Do something
}
Pros
Works on every environment
You can use break and continue...