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How do I read / convert an InputStream into a String in Java?
If you have a java.io.InputStream object, how should you process that object and produce a String ?
59 Answers
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How can I convert an image into a Base64 string?
...on Android, here's a helper copied from the React Native codebase:
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import android.util.Base64;
import androi...
Why does Java's hashCode() in String use 31 as a multiplier?
Per the Java documentation, the hash code for a String object is computed as:
13 Answers
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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...three 1.0 2.24 NaN 2.24 2.24 2.24 2.24 2.24
two 1.0 -0.98 NaN -0.98 -0.98 -0.98 -0.98 -0.98
foo one 2.0 1.36 0.58 0.95 1.15 1.36 1.56 1.76
three 1.0 -0.15 NaN -0.15 -0.15 -0.15 -0.15 -0.15
two 2.0 1.42 0.63 0.98 1.20 1.42 1.65 1.87
To get s...
Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
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MaxPermSize is ignored since Java 8.
– user2418306
Apr 4 '16 at 11:11
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show 11 more comments
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JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
...INGLE standard, but I have seen 3 styles you mention ("Pascal/Microsoft", "Java" (camelCase) and "C" (underscores, snake_case)) -- as well as at least one more, kebab-case like longer-name).
It mostly seems to depend on what background developers of the service in question had; those with c/c++ bac...
URL query parameters to dict python
...t;> url = "http://www.example.org/default.html?ct=32&op=92&item=98"
>>> parse.urlsplit(url)
SplitResult(scheme='http', netloc='www.example.org', path='/default.html', query='ct=32&op=92&item=98', fragment='')
>>> parse.parse_qs(parse.urlsplit(url).query)
{'item':...
Executing JavaScript without a browser?
I am looking into Javascript programming without a browser. I want to run scripts from the Linux or Mac OS X command line, much like we run any other scripting language (ruby, php, perl, python...)
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How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
...r: "Double.NaN==Double.NaN has the value false". This is elaborated in the Java Language Specification under "Floating-Point Types, Formats, and Values":
NaN is unordered, so the numerical
comparison operators <, <=, >, and >=
return false if either or both
operands are NaN. Th...
Why does Java switch on contiguous ints appear to run faster with added cases?
I am working on some Java code which needs to be highly optimized as it will run in hot functions that are invoked at many points in my main program logic. Part of this code involves multiplying double variables by 10 raised to arbitrary non-negative int exponent s. One fast way (edit: but no...