大约有 43,000 项符合查询结果（耗时：0.0505秒） [XML]
The opposite of Intersect()
...rray2.Except(array1);
If you want the real non-intersection (also both 1 and 4), then this should do the trick:
var nonintersect = array1.Except(array2).Union( array2.Except(array1));
This will not be the most performant solution, but for small lists it should work just fine.
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In-App Billing test: android.test.purchased already owned
I am currently testing In-App Billing for a future app, and after I successfully "bought" the test item "android.test.purchased" the first time, I now receive the response code 7 every time I try to buy it again, which means that I already own this item.
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How do I parse JSON with Objective-C?
...m new to iPhone. Can anyone tell me the steps to follow to parse this data and get the activity details, first name, and last name?
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Drop unused factor levels in a subsetted data frame
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As a side-effect the function converts the data frame to a list, so the mydf <- droplevels(mydf) solution suggested by Roman Luštrik and Tommy O'Dell below is preferable.
– Johan
May 9 '14 at 10:41
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
...eare gives you a nice walkthrough link (found in the page @yuri linked) to convert my simple rails 2.3 plugins to 3.2. I liked this solution because it didn't just silence the warnings, it actually fixes them.
– Jeremiah
Oct 8 '13 at 17:24
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Print a file's last modified date in Bash
...t the modification date as a timestamp
date -d @1503989421 +%Y%m%d%H%M%S # Convert the date (from timestamp)
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Where/How to getIntent().getExtras() in an Android Fragment? [duplicate]
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What I tend to do, and I believe this is what Google intended for developers to do too, is to still get the extras from an Intent in an Activity and then pass any extra data to fragments by instantiating them with arguments.
There's actually a...
What is the Java equivalent for LINQ? [closed]
... JDK8 called The Power of the Arrow, also NetBeans 8 has great support for converting constructs to JDK8 which I've also blogged about Migrating to JDK 8 with NetBeans.
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.htaccess redirect all pages to new domain
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I've used for my Wordpress blog this as .htaccess. It converts http://www.blah.example/asad, http://blah.example/asad, http://www.blah.example2/asad etc, to http://blah.example/asad
Thanks to all other answers I figured this out.
<IfModule mod_rewrite.c>
RewriteEngine On
R...
Get size of an Iterable in Java
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In general, if there is the chance that values is actually a Collection and not only an Iterable, check this and call size() in case:
if (values instanceof Collection<?>) {
return ((Collection<?>)values).size();
}
// use Iterator here...
The call to size() will usually be much fa...