大约有 12,000 项符合查询结果（耗时：0.0243秒） [XML]
linq query to return distinct field values from a list of objects
...
Sure, use Enumerable.Distinct.
Given a collection of obj (e.g. foo), you'd do something like this:
var distinctTypeIDs = foo.Select(x => x.typeID).Distinct();
share
|
improve this a...
How to duplicate a whole line in Vim?
...of :t.
This can be really powerful if you combine it with :g or :v:
:v/foo/m$ will move all lines not matching the pattern “foo” to the end of the file.
:+,$g/^\s*class\s\+\i\+/t. will copy all subsequent lines of the form class xxx right after the cursor.
Reference: :help range, :help :t,...
Using Git how do I find changes between local and remote
... isn't configured with an upstream. To fix, run git branch --set-upstream foo origin/foo.
– Richard Hansen
Oct 1 '11 at 18:18
...
How to get innerHTML of DOMNode?
...php
$doc = new \DOMDocument();
$doc->loadHTML("<body><div id='foo'><p>This is <b>an <i>example</i></b> paragraph<br>\n\ncontaining newlines.</p><p>This is another paragraph.</p></div></body>");
print innerHTML($doc-&g...
Delete empty lines using sed
...er solutions can preserve the original colors. Compare unbuffer apt search foo | grep . to unbuffer apt search foo | grep -v ^$
– wisbucky
Apr 25 '19 at 23:12
add a comment
...
What's the difference between a proc and a lambda in Ruby?
...using return in a proc returns from the enclosing block.
lambda { return :foo }.call # => :foo
return # => LocalJumpError: unexpected return
Proc.new { return :foo }.call # => LocalJumpError: unexpected return
So for most quick uses they're the same, but if you want automatic strict argu...
List vs List
...>
So:
void withWilds( List<? extends Map<String,String>> foo ){}
void noWilds( List<Map<String,String>> foo ){}
void main( String[] args ){
List<HashMap<String,String>> myMap;
withWilds( myMap ); // Works
noWilds( myMap ); // Compiler error
}
...
Variable name as a string in Javascript
...and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(key + ': ' + obj[key]);
share
|
improve this answer
...
How do you create a Distinct query in HQL
...anged to protect identities)
String queryString = "select distinct f from Foo f inner join foo.bars as b" +
" where f.creationDate >= ? and f.creationDate < ? and b.bar = ?";
return getHibernateTemplate().find(queryString, new Object[] {startDate, endDate, bar});
...
Key existence check in HashMap
...
Do you ever store a null value? If not, you can just do:
Foo value = map.get(key);
if (value != null) {
...
} else {
// No such key
}
Otherwise, you could just check for existence if you get a null value returned:
Foo value = map.get(key);
if (value != null) {
...
} ...