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How to add/update an attribute to an HTML element using JavaScript?
...nnerHTML slop, I would treat it like one and stick with the e.className = 'fooClass' and e.id = 'fooID'. This is a design preference, but in this instance trying to treat is as anything other than an object works against you.
It will never backfire on you like the other methods might, just be awar...
How to use range-based for() loop with std::map?
... called structured bindings, which allows for the following:
std::map< foo, bar > testing = { /*...blah...*/ };
for ( const auto& [ k, v ] : testing )
{
std::cout << k << "=" << v << "\n";
}
...
Release generating .pdb files, why?
... you can force it to load by specifying the /i option like this .reload /i foo.dll. That will load foo.pdb even if foo.pdb was created after releasing foo.dll.
– Marc Sherman
Nov 29 '12 at 14:20
...
JavaScript plus sign in front of function expression
... functions that are invoked immediately, e.g.:
+function() { console.log("Foo!"); }();
Without the + there, if the parser is in a state where it's expecting a statement (which can be an expression or several non-expression statements), the word function looks like the beginning of a function decl...
What's the point of g++ -Wreorder?
...
This can bite you if your initializers have side effects. Consider:
int foo() {
puts("foo");
return 1;
}
int bar() {
puts("bar");
return 2;
}
struct baz {
int x, y;
baz() : y(foo()), x(bar()) {}
};
The above will print "bar" then "foo", even though intuitively one woul...
How does the “this” keyword work?
...is
Simple function invocation
Consider the following function:
function foo() {
console.log("bar");
console.log(this);
}
foo(); // calling the function
Note that we are running this in the normal mode, i.e. strict mode is not used.
When running in a browser, the value of this would be ...
How do I trim whitespace?
...
For leading and trailing whitespace:
s = ' foo \t '
print s.strip() # prints "foo"
Otherwise, a regular expression works:
import re
pat = re.compile(r'\s+')
s = ' \t foo \t bar \t '
print pat.sub('', s) # prints "foobar"
...
Collections.emptyList() vs. new instance
...5.0 you can specify the type of element in the container:
Collections.<Foo>emptyList()
I concur with the other responses that for cases where you want to return an empty list that stays empty, you should use this approach.
...
Tuples( or arrays ) as Dictionary keys in C#
...ht reference comarison...try: bool test = new Tuple<int, string>(1, "foo").Equals(new Tuple<int, string>(1, "Foo".ToLower()));
– Mike Marynowski
Aug 5 '13 at 5:09
...
JavaScript variable number of arguments to function
...
Sure, just use the arguments object.
function foo() {
for (var i = 0; i < arguments.length; i++) {
console.log(arguments[i]);
}
}
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