大约有 12,000 项符合查询结果（耗时：0.0239秒） [XML]
Is the ternary operator faster than an “if” condition in Java [duplicate]
... to use the ternary operator. If you don't have an assignment:
(i == 0) ? foo () : bar ();
an if/else isn't that much more code:
if (i == 0) foo (); else bar ();
In performance critical cases: measure it. Measure it with the target machine, the target JVM, with typical data, if there is a bot...
Removing item from vector, while in C++11 range 'for' loop?
...y using:
for (MyVector::iterator b = v.begin(); b != v.end();) {
if (foo) {
b = v.erase( b ); // reseat iterator to a valid value post-erase
else {
++b;
}
}
Note, that you need the b != v.end() test as-is. If you try to optimize it as follows:
for (MyVector::iterator b...
Adding multiple class using ng-class
...lt;div ng-class="[class1, class2]"></div>
Usage:
<div class="foo bar" class1="foo" class2="bar"></div>
share
|
improve this answer
|
follow
...
Share variables between files in Node.js?
...just want to export your "name" variable. E.g.,
// module.js
var name = "foobar";
// export it
exports.name = name;
Then, in main.js...
//main.js
// get a reference to your required module
var myModule = require('./module');
// name is a member of myModule due to the export above
var name = my...
jQuery pitfalls to avoid [closed]
... due to the fact that in older versions of jquery, it was faster to do $('#foo') rather than $('div#foo'), since by definition, an id is unique. I'm pretty sure this was fixed in later releases however, but that recommendation applied only to ids, not other types of selectors
–...
Can I write a CSS selector selecting elements NOT having a certain class or attribute?
...ritten. For
instance :not(*|*), which represents no element at all, or
foo:not(bar), which is equivalent to foo but with a higher
specificity.
share
|
improve this answer
|
...
Testing two JSON objects for equality ignoring child order in Java
...could try using json-lib's JSONAssert class:
JSONAssert.assertEquals(
"{foo: 'bar', baz: 'qux'}",
JSONObject.fromObject("{foo: 'bar', baz: 'xyzzy'}")
);
Gives:
junit.framework.ComparisonFailure: objects differed at key [baz]; expected:<[qux]> but was:<[xyzzy]>
...
The key must be an application-specific resource id
...
You can use any resource - even just take a random R.id.FOO where FOO is some id in your project.
– Artem Russakovskii
Aug 31 '11 at 22:34
17
...
Lists in ConfigParser
...ybe helpful for some.
I am using a combination of ConfigParser and JSON:
[Foo]
fibs: [1,1,2,3,5,8,13]
just read it with:
>>> json.loads(config.get("Foo","fibs"))
[1, 1, 2, 3, 5, 8, 13]
You can even break lines if your list is long (thanks @peter-smit):
[Bar]
files_to_check = [
"...
Is it OK to use == on enums in Java?
...und(double n) { ...; }
};
public abstract int round(double n);
}
int foo(Rounding roundMethod) {
return roundMethod.round(someCalculation());
}
int bar() {
return foo(Rounding.ROUND_UP);
}
share
|
...