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How/When does Execute Shell mark a build as failure in Jenkins?
... exit code, you can either hoist the command into your if statement:
grep foo bar; if [ $? == 0 ]; then ... --> if grep foo bar; then ...
Or you can capture the return code in your || clause:
grep foo bar || ret=$?
...
What is the python “with” statement designed for?
...sulated for convenient reuse.
2.
You could do something like:
with open("foo.txt") as foo_file:
data = foo_file.read()
OR
from contextlib import nested
with nested(A(), B(), C()) as (X, Y, Z):
do_something()
OR (Python 3.1)
with open('data') as input_file, open('result', 'w') as outpu...
Is it possible to use jQuery .on and hover?
...ny interference. But .hover() works just fine as an event with .on().
$("#foo").on("hover", function() {
// disco
});
If you want to be able to utilize its events, use the returned object from the event:
$("#foo").on("hover", function(e) {
if(e.type == "mouseenter") {
console.log("over")...
What are the main purposes of using std::forward and which problems it solves?
...the function the parameter could be passed as an lvalue to anything:
void foo(int&);
template <typename T>
void deduce(T&& x)
{
foo(x); // fine, foo can refer to x
}
deduce(1); // okay, foo operates on x which has a value of 1
That's no good. E needs to get the same kind o...
Which MySQL data type to use for storing boolean values
...
@Walter: This is easy to test, e.g SELECT 'foo' AS bar FROM dual WHERE -7. The expression -7 is evaluated in a boolean context, and the query returns a row. We can test with 0, or any expression that evaluates to integer value 0, and no row is returned. If the expres...
When is an interface with a default method initialized?
...c static void main(String[] args) throws Exception {
InterfaceType foo = new InterfaceTypeImpl();
System.out.println(InterfaceType.init);
foo.method();
}
}
class InterfaceTypeImpl implements InterfaceType {
@Override
public void method() {
System.out.prin...
Interfaces — What's the point?
...BolucPapuccuoglu: Beyond that, with a statically-typed object if one knows foo implements IWidget, then a programmer seeing a call to foo.woozle() can look at the documentation for IWidget and know what that method is supposed to do. The programmer might have no way of knowing where the code for th...
How to return multiple lines JSX in another return statement in React?
...urn an array as part of rendering a component, e.g <div>{ this.props.foos.map(function() { return <Foo /> }) }</div>. But the render function of the component can't return that array without wrapping it, e.g. in a div.
– Henrik N
Jul 2 '16 at ...
“Java DateFormat is not threadsafe” what does this leads to?
...ed to create separate format instances for each thread.
So, in case your Foo.handleBar(..) is accessed by multiple threads, instead of:
public class Foo {
private DateFormat df = new SimpleDateFormat("dd/mm/yyyy");
public void handleBar(Bar bar) {
bar.setFormattedDate(df.format(b...
How to split a string, but also keep the delimiters?
...t("'ab','cd','eg'")));
System.out.println(Arrays.toString(p.split("boo:and:foo")));
output:
[', ab, ',', cd, ',', eg, ']
[boo, :, and, :, foo]
EDIT: What you see above is what appears on the command line when I run that code, but I now see that it's a bit confusing. It's difficult to keep trac...