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Why does the C# compiler go mad on this nested LINQ query?
...o compile following code and you'll find that compiler takes >3 GB of RAM (all free memory on my machine) and very long time to compile (actually I get IO exception after 10 minutes).
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Concurrent vs serial queues in GCD
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A simple example: you have a block that takes a minute to execute. You add it to a queue from the main thread. Let's look at the four cases.
async - concurrent: the code runs on a background thread. Control returns immediately to the ...
How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]
...
return function(element, index, array) {
return !(element in seen) && (seen[element] = 1);
};
}());
http://jsperf.com/array-filter-unique/13
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浅谈HTML5 & CSS3的新交互特性 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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2. 更好的表格体系
现在，你可以抛弃JavaScript或者是PHP，只通过HTML5来定义表格。你可以定义每个表格单元的输入格式，也可以定义这个单元是否是必填的等等。
3. 音频、视频API
HTML5不但允许你在网页中直接整合视频、...
registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later
... }
else
{
return ([self enabledRemoteNotificationTypes] & UIRemoteNotificationTypeAlert);
}
}
- (void)registerForPushNotifications
{
if ([self respondsToSelector:@selector(registerForRemoteNotifications)])
{
[self registerForRemoteNotifications];
C...
Is it possible to declare a variable in Gradle usable in Java?
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An example of usage an Api App Key in an Android application (Java and XML)
gradle.properties
AppKey="XXXX-XXXX"
build.gradle
buildTypes {
//...
buildTypes.each {
it.buildConfigField 'String', 'APP_KEY_1', AppKey
...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...nt-driven publish/subscribe application with NodeJS and Redis. I need an example of how to notify web clients when the data values in Redis change.
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How to sign an android apk file
...an verify the alignment with
zipalign -c 4 my-aligned.apk
Step 3: Sign & Verify
Using build-tools 24.0.2 and older
Use jarsigner which, like the keytool, comes with the JDK distribution found in %JAVA_HOME%/bin/ and use it like so:
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -k...
MySQL Like multiple values
...GEXP 'sports|pub'
Found this solution here: http://forums.mysql.com/read.php?10,392332,392950#msg-392950
More about REGEXP here: http://www.tutorialspoint.com/mysql/mysql-regexps.htm
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How do I maintain the Immersive Mode in Dialogs?
... UI visibility before adding it to the manager. In the Android Immersive example it's commented that:
// * Uses semi-transparent bars for the nav and status bars
// * This UI flag will *not* be cleared when the user interacts with the UI.
// When the user swipes, the bars will temporarily appear fo...