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Is there a Mutex in Java?
...ock;
import java.util.concurrent.locks.ReentrantLock;
private final Lock _mutex = new ReentrantLock(true);
_mutex.lock();
// your protected code here
_mutex.unlock();
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Refresh a page using JavaScript or HTML [duplicate]
...g (ajax) at loading. for example: www.yoursite.com/page/about?getVer=1&__[date]
Compare it to the stored versionnumber (stored in cookie or localStorage) if user has visited the page once, otherwise store it directly.
If version is not the same as local version, refresh the page using window.loc...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
..., timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=datetime.now() + timedelta(days=1))
This last line is not defining a function; it is invoking a function to create a field in the class.
PRE Django 1.7
Django lets you pass a callable...
Spring Data JPA find by embedded object property
...Long twoId); and results in a query of the form: select ...... from one one_ left outer join two two_ on one_.two_id = two_.id where one_id = ? and two_.id = ?
– TroJaN
May 4 at 17:17
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Returning a value from thread?
...ne thread sets the variable and exactly one thread reads it, and the exact order of set vs. read does not matter to the correct execution of the code (i.e. the termination condition might occur in the main thread slightly earlier or later depending on the order the threads are scheduled in, but eith...
Usage of forceLayout(), requestLayout() and invalidate()
...ake any sense if we think about those calls being invoked in the different order (and they call invalidate() right after requestLayout() in TextView as well). Maybe it deserves another question on StackOverflow :)?
– Bartek Lipinski
May 15 '15 at 9:21
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Rails: fields_for with index?
...s there a method (or way to pull off similar functionality) to do a fields_for_with_index ?
9 Answers
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How to debug JavaScript / jQuery event bindings with Firebug or similar tools?
...Query stores your handler internally).
jQuery 1.8.x
var clickEvents = $._data($('#foo')[0], "events").click;
jQuery.each(clickEvents, function(key, handlerObj) {
console.log(handlerObj.handler) // prints "function() { console.log('clicked!') }"
})
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How to use if statements in underscore.js templates?
...ver again, which templates are supposed to solve for you. As of right now, _.template inserts a ; at the start of each compiled code tag. Thus, it can handle tags breaking between statements, but not inside of expressions. Compare;if(a){b;}else{c;} to ;a?b;:c;.
– Keen
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Add a property to a JavaScript object using a variable as the name?
...
With lodash, you can create new object like this _.set:
obj = _.set({}, key, val);
Or you can set to existing object like this:
var existingObj = { a: 1 };
_.set(existingObj, 'a', 5); // existingObj will be: { a: 5 }
You should take care if you want to use dot (".") i...