Detail Focused

A heap is a specialized tree -based data structure that satisfies the heap property: if P is a parent node of C, then the key (the value) ...

For example [3,4,5,2,1], median is 3. [3,4,5,2,1,6] median is (3+4)/2=3.5 The easiest way is to sort them and then calculate the median. ...

HATEOAS basically means when you trigger a request, the restful service not only returns the data but also the further actions (URLs) you ca...

https://angularfirebase.com/lessons/methods-for-debugging-an-angular-application/ https://www.youtube.com/watch?time_continue=9&v=gxix...

https://spring.io/guides/gs/rest-service-cors/ @CrossOrigin(origins = "http://localhost:9000") This @CrossOrigin annotation e...

newline break two space at the end of line, it is two "Enter", it is

Employee and EmployeeTitle are parent and child class. I made an extreme example here. Both fetch is eager. Actually JPA can deal it, whi...

The big advantage is we don't have to worry about CORS https://github.com/prograhammer/vue-example-project#proxy-api-calls-in-webpack-d...

Here is the way to integrate jquery-ui in webpack project npm install jquery - ui - dist -- save webpack.config.js resolve : { ali...

The data are only reactive if they existed when the instance was created. That means if you add a new property, like: vm.b = 'hi' Th...

Generators are best for calculating large sets of results (particularly calculations involving loops themselves) where you don’t want to all...

List comprehensions provide a concise way to create lists. [thing for thing in list_of_things] [thing for thing in list_of_things if thin...

I am using pytest https://docs.pytest.org/en/latest/ python -m pytest py.test -v py.test -s # which allows print Be careful of the...

https://dzone.com/articles/common-fork-join-pool-and-streams how do you make the parallel streams use their own Fork Join Pools instead of...

reshape change the dimension of the array rangeArray = np.arange(6,12) # [6,7,8,9,10,11] rangeArray = rangeArray.reshape((2,3)) # [[6,7,...

Python function parameters is like this *non-keywords is a tuple ** keywords is a dict You can call the method like newfoo(2, 4, *(6, 8...

http://www.journaldev.com/2573/spring-mvc-file-upload-example-single-multiple-files http://memorynotfound.com/spring-mvc-download-file-exa...

https://stackoverflow.com/questions/3066199/break-when-exception-is-thrown

iternate dataframe for index, row in prediction_df.iterrows():         print(row['columnName']) rename dataframe column nam...

check if dict has key if key in dict python 3.6 install package after 3.4, pip is not standalone, to install a package, run python -m ...

-install ember-cli npm install -g ember-cli - create project ember new hello-world --start server ember server - create controller ...

Usually, a static class shall not depend on some specific object. But in some cases, we want to inject some env specific instance into the s...

In elasticsearch, to get the distinct value of one field, it is using term aggregation. For example, here are the documents  {     ...

Full-text search queries The most important queries in this category are the following: - match_all - match - match_phrase - multi_mat...

https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-update-by-query.html#picking-up-a-new-property This is helpful when y...

For example, if you want to see the verbose jvm log for SSL handshake, add JVM parameters -Djavax.net.debug=all -Djavax.net.debug=ssl:hand...

When post with large text, you may get the error "request entity too large", here is the code to fix that.

http://massapi.com/method/javax/ws/rs/client/ClientBuilder.sslContext.html http://stackoverflow.com/questions/30121510/java-httpsurlconnec...

webpack enable sourcemaps -- to be continued --

Elasticsearch can have nested query or parent-child join query. https://www.elastic.co/guide/en/elasticsearch/guide/current/nested-objects...

To avoid this error http://stackoverflow.com/questions/19917401/error-request-entity-too-large

The document of passportjs is not good. I followed the document and it did not make my code work. After reading a couple of tutorial online...

https://gist.github.com/jobsamuel/6d6095d52228461f3c53

The javascript is now using lots of asynchronous call.  In some scenarios, you need an asynchronous call chain, one after another. Promise c...