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How to lay out Views in RelativeLayout programmatically?
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set(id) should be used with generateViewId () Added in API level 17. It Generates a value suitable for use in setId(int). This value will not collide with ID values generated at build time by aapt for R.id. Example: tv[l_idx].setId(View.generateViewId());
– ...
How to read environment variables in Scala
...OME")
res0: String = /home/paradigmatic
I think is nice to use the Scala API instead of Java. There are currently several project to compile Scala to other platforms than JVM (.NET, javascript, native, etc.) Reducing the dependencies on Java API, will make your code more portable.
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How to fix 'android.os.NetworkOnMainThreadException'?
...ecution characteristics depending on the platform it executes on: prior to API level 4 AsyncTasks execute serially on a single background thread; from API level 4 through API level 10, AsyncTasks execute on a pool of up to 128 threads; from API level 11 onwards AsyncTask executes serially on a singl...
Collection versus List what should you use on your interfaces?
... question as to why not List<T>, The reasons are future-proofing and API simplicity.
Future-proofing
List<T> is not designed to be easily extensible by subclassing it; it is designed to be fast for internal implementations. You'll notice the methods on it are not virtual and so cannot ...
Custom HTTP headers : naming conventions
...TTP headers of requests we send them, or even responses they get from our API.
What is the general convention to add custom HTTP headers, in terms of naming , format ... etc.
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How to convert currentTimeMillis to a date in Java?
...ate=new Date(millis);
We can use java.time package (tutorial) - DateTime APIs introduced in the Java SE 8.
var instance = java.time.Instant.ofEpochMilli(millis);
var localDateTime = java.time.LocalDateTime
.ofInstant(instance, java.time.ZoneId.of("Asia/Kolkata"));
var zon...
How to parse freeform street/postal address out of text, and into components
...ut the TOS is rather prohibitive; for example, you can't use their data or APIs without showing a Google Map, and for non-commerical purposes only (unless you pay), and you can't store the data (except for temporary caching). Makes sense. Google's data is some of the best in the world. However, Goog...
What does it mean to hydrate an object?
...gging performance optimizations that are in the internals of a data access API, then you probably don't need to deal with hydration explicitly. You would typically use deserialization instead so you can write less code. Some data access APIs don't give you this option, and in those cases you'd also ...
How to check if current thread is not main thread
...als( Looper.getMainLooper().getThread() )
Or, if the runtime platform is API level 23 (Marshmallow 6.0) or higher:
Looper.getMainLooper().isCurrentThread()
See the Looper API. Note that calling Looper.getMainLooper() involves synchronization (see the source). You might want to avoid the overh...
Run an OLS regression with Pandas Data Frame
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>>> import pandas as pd
>>> import statsmodels.formula.api as sm
>>> df = pd.DataFrame({"A": [10,20,30,40,50], "B": [20, 30, 10, 40, 50], "C": [32, 234, 23, 23, 42523]})
>>> result = sm.ols(formula="A ~ B + C", data=df).fit()
>>> print(result.params)
In...