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Java Generics (Wildcards)
...me pretty good explanations of generics in the articles Wildcards and More Fun with Wildcards.
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Difference between @Before, @BeforeClass, @BeforeEach and @BeforeAll
...
Before and BeforeClass in JUnit
The function @Before annotation will be executed before each of test function in the class having @Test annotation but the function with @BeforeClass will be execute only one time before all the test functions in the class.
Simi...
Difference between matches() and find() in Java Regex
...
Pattern p = Pattern.compile("\\d\\d\\d");
Matcher m = p.matcher("a123b");
System.out.println(m.find());
System.out.println(m.matches());
p = Pattern.compile("^\\d\\d\\d$");
m = p.matcher("123");
System.out.println(m.find());
System.out.println(m.matches());
}
/* ou...
Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ontent content3
再把这三条消息发送给某个用户，其<USRID>是123：
redis> SADD usr:123:msg 1
redis> SADD usr:123:msg 2
redis> SADD usr:123:msg 3
此时如果简单查询用户有哪些消息的话，无疑只能查到一些<MSGID>：
redis> SMEMBERS usr:123:msg
1) "1"
2) "2...
How to sort my paws?
...ething working consistently! This problem pulled me in for several days... Fun stuff! Sorry for the length of this answer, but I need to elaborate a bit on some things... (Though I may set a record for the longest non-spam stackoverflow answer ever!)
As a side note, I'm using the full dataset that ...
How can I parse a string with a comma thousand separator to a number?
...1), '.');
return parseFloat(normalized);
}
const corpus = {
'1.123': {
expected: 1.123,
locale: 'en-US'
},
'1,123': {
expected: 1123,
locale: 'en-US'
},
'2.123': {
expected: 2123,
locale: 'fr-FR'
},
'2,123': {
expected: 2.123,
loc...
passing argument to DialogFragment
... dialogFragment.show(fm, "Sample Fragment")
// receive
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
if (getArguments() != null) {
val mArgs = arguments
var myDay= mArgs.getString("title")
}
}
...
Javascript : natural sort of alphanumerical strings
...ebeckennebec
89.8k2828 gold badges9696 silver badges123123 bronze badges
...
Format in kotlin string templates
...ound, you can use something like:
"pi = ${pi.format(2)}"
the .format(n) function you'd need to define yourself as
fun Double.format(digits: Int) = "%.${digits}f".format(this)
There's clearly a piece of functionality here that is missing from Kotlin at the moment, we'll fix it.
...
C# DateTime to “YYYYMMDDHHMMSS” format
...e has great examples check it out
// create date time 2008-03-09 16:05:07.123
DateTime dt = new DateTime(2008, 3, 9, 16, 5, 7, 123);
String.Format("{0:y yy yyy yyyy}", dt); // "8 08 008 2008" year
String.Format("{0:M MM MMM MMMM}", dt); // "3 03 Mar March" month
String.Format("{0:d ...