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Catch an exception thrown by an async void method
...ubble up to the calling code - but only if you await or Wait() the call to Foo.
public async Task Foo()
{
var x = await DoSomethingAsync();
}
public async void DoFoo()
{
try
{
await Foo();
}
catch (ProtocolException ex)
{
// The exception will be caught be...
Instantiating a generic class in Java [duplicate]
...
Why not pass new Foo() as argument?
– fastcodejava
Mar 12 '10 at 12:04
2
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How to import module when module name has a '-' dash or hyphen in it?
I want to import foo-bar.py. This works:
5 Answers
5
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How can I reliably determine the type of a variable that is declared using var at design time?
... type of a particular expression inside a method body -- say you've typed "foo." and we need to figure out what are the members of foo -- we do the same thing; we skip as much work as we reasonably can.
We start with a pass which analyzes only the local variable declarations within that method. W...
Error message Strict standards: Non-static method should not be called statically in php
...en the respective function or variable should be declared as static
class Foo {
//Static variable
public static $static_var = 'static variable';
//Static function
static function staticValue() { return 'static function'; }
//function
function V...
Check variable equality against a list of values
I'm checking a variable, say foo , for equality to a number of values. For example,
13 Answers
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StringUtils.isBlank() vs String.isEmpty()
...
StringUtils.isBlank() will also check for null, whereas this:
String foo = getvalue("foo");
if (foo.isEmpty())
will throw a NullPointerException if foo is null.
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When to use RSpec let()?
...I prefer this to one large before hook containing all of this. Also, let(:foo) { Foo.new } is less noisy (and more to the point) then before(:each) { @foo = Foo.new }. Here's an example of how I use it: github.com/myronmarston/vcr/blob/v1.7.0/spec/vcr/util/…
– Myron Marston...
How can you iterate over the elements of an std::tuple?
...t;boost/hana.hpp>
#include <boost/hana/ext/std/tuple.hpp>
struct Foo1 {
int foo() const { return 42; }
};
struct Foo2 {
int bar = 0;
int foo() { bar = 24; return bar; }
};
int main() {
using namespace std;
using boost::hana::for_each;
Foo1 foo1;
Foo2 foo2;
...
How to filter rows in pandas by regex
...lready a string handling function Series.str.startswith().
You should try foo[foo.b.str.startswith('f')].
Result:
a b
1 2 foo
2 3 fat
I think what you expect.
Alternatively you can use contains with regex option. For example:
foo[foo.b.str.contains('oo', regex= True, na=False)...