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Why is String immutable in Java?
...opy, and not change its copy. When thinking of a problem with mutable java.lang.Strings, think of how C++ solves this problem (since it has mutable std::strings.
– Limited Atonement
Jan 13 '16 at 15:48
...
Java: difference between strong/soft/weak/phantom reference
... there may be an error on the linked webpage. The Javadoc for package java.lang.ref and that for PhantomReference suggest that an object is not garbage collected until after it is no longer "phantom reachable", implying that (unlike SoftReference) a PhantomReference must be dequeued before the objec...
Can I pass an array as arguments to a method with variable arguments in Java?
...n Object[], so you can also call ezFormat(args) either way.
See also
Java language guide/varargs
Varargs gotchas #1: passing null
How varargs are resolved is quite complicated, and sometimes it does things that may surprise you.
Consider this example:
static void count(Object... objs) {
Syste...
Detect network connection type on Android
...d.net.NetworkInfo;
import android.telephony.TelephonyManager;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* <p>Utility methods to check the current network connection status.</p>
*
* <p>This requires the caller to hold the permissio...
Append values to query string
...coding, ...:
string longurl = "http://somesite.com/news.php?article=1&lang=en";
var uriBuilder = new UriBuilder(longurl);
var query = HttpUtility.ParseQueryString(uriBuilder.Query);
query["action"] = "login1";
query["attempts"] = "11";
uriBuilder.Query = query.ToString();
longurl = uriBuilder.T...
What is the difference between the remap, noremap, nnoremap and vnoremap mapping commands in Vim?
...r-pending mode). If you want a mapping to work in insert, command-line, or lang-arg mode, you need to use :map!, etc. (Source: vimdoc.sourceforge.net/htmldoc/map.html#map-overview)
– Ken Bellows
Jun 26 '13 at 14:00
...
How do I set a variable to the output of a command in Bash?
...em#*/mapper/}" "$mounted" $pct $blocks "$use"
done
} {list}< <(LANG=C df -k)
And of course with inline documents:
while IFS=\; read -u $list -a myvar ;do
echo ${myvar[2]}
done {list}<<"eof"
foo;bar;baz
alice;bob;charlie
$cherry;$strawberry;$memberberries
eof
Older part of ans...
How to get the Full file path from URI
...
Caused by: java.lang.IllegalArgumentException: URI is not absolute
– Anu Martin
Feb 15 '18 at 18:13
14
...
Make Iframe to fit 100% of container's remaining height
...D/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<style>
*{margin:0;padding:0}
html, body {height:100%;width:100%;overflow:hidden}
table {height:100%;width:100%;table-layout:static;border-collapse:collapse}
iframe {height:100%;widt...
How does the Java 'for each' loop work?
...an int index counter and checks against array.length instead. See the Java Language Specification.
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