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Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”

... Put servlet class in a package First of all, put the servlet class in a Java package. You should always put publicly reuseable Java classes in a package, otherwise they are invisible to classes which are in a package, such as the server itself. This way you elimini...
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How do I find out which settings.xml file maven is using

I recently changed my password and have to change my maven settings.xml file to reflect that. However, no matter what I do in the settings.xml file, the changed password just won't get picked up. Out of desperation, I ran maven with the -s switch ( mvn -s <my intended settings.xml file> ) and ...
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What is the Difference Between read() and recv() , and Between send() and write()?

...ions read()/write() are the universal file descriptor functions working on all descriptors. share | improve this answer | follow | ...
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How do I convert array of Objects into one Object in JavaScript?

... item.value, obj) ,{}); Here we benefit from comma operator, it evaluates all expression before comma and returns a last one(after last comma). So we don't copy obj each time, rather assigning new property to it. share ...
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How can I use Guzzle to send a POST request in JSON?

... For Guzzle 5, 6 and 7 you do it like this: use GuzzleHttp\Client; $client = new Client(); $response = $client->post('url', [ GuzzleHttp\RequestOptions::JSON => ['foo' => 'bar'] // or 'json' => [...] ]); Docs ...
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How to search in array of object in mongodb

...hout $elemMatch mongo will look for users with National Medal in some year and some award in 1975s, but not for users with National Medal in 1975. See MongoDB $elemMatch Documentation for more info. See Read Operations Documentation for more information about querying documents with arrays. ...
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'Contains()' workaround using Linq to Entities?

...sion.Lambda<Func<TEntity, bool>>(body, p)); } //Optional - to allow static collection: public static IQueryable<TEntity> WhereIn<TEntity, TValue> ( this ObjectQuery<TEntity> query, Expression<Func<TEntity, TValue>> selector, params TValue[] co...
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How does Rails keep track of which migrations have run for a database?

...runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version", indicating it has been run. If you roll back that migration, Rails will delete the corresponding row from schema_migrations. For example, running a migration file named 20120620193144_cr...
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Disable LESS-CSS Overwriting calc() [duplicate]

... @gion_13 You're actually right, you can turn on the Strict Math setting. Time to polish this answer a bit. =] – Fabrício Matté May 27 '14 at 15:20 ...
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Is there a Mutex in Java?

...someObject) { ... } You can read more about this here: Intrinsic Locks and Synchronization share | improve this answer | follow | ...