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Why is isNaN(null) == false in JS?
...
Won't work if myInt="123d". parseInt converts "123d" to 123, which then fails the isNaN test.
– divesh premdeep
Feb 18 '15 at 13:34
...
Format a number as 2.5K if a thousand or more, otherwise 900
...rx, "$1") + si[i].symbol;
}
/*
* Tests
*/
var tests = [
{ num: 1234, digits: 1 },
{ num: 100000000, digits: 1 },
{ num: 299792458, digits: 1 },
{ num: 759878, digits: 1 },
{ num: 759878, digits: 0 },
{ num: 123, digits: 1 },
{ num: 123.456, digits: 1 },
{ num: 123.45...
What is the benefit of zerofill in MySQL?
... y INT(8) NOT NULL);
INSERT INTO yourtable (x,y) VALUES
(1, 1),
(12, 12),
(123, 123),
(123456789, 123456789);
SELECT x, y FROM yourtable;
Result:
x y
00000001 1
00000012 12
00000123 123
123456789 123456789
...
Validate that a string is a positive integer
...ue);
},
false
);
test("1", true);
test("1.23", false);
test("1234567890123", true);
test("1234567890123.1", false);
test("0123", false); // false because we don't handle leading 0s
test(" 123 ", false); // false because we don't handle whitespace
<label>
String:
<inp...
Convert JavaScript string in dot notation into an object reference
...,'etc']) #works with both strings and lists
5
> index(obj,'a.b.etc', 123) #setter-mode - third argument (possibly poor form)
123
> index(obj,'a.b.etc')
123
...though personally I'd recommend making a separate function setIndex(...). I would like to end on a side-note that the original...
Can I replace groups in Java regex?
...s) {
// replace with "%" what was matched by group 1
// input: aaa123ccc
// output: %123ccc
System.out.println(replaceGroup("([a-z]+)([0-9]+)([a-z]+)", "aaa123ccc", 1, "%"));
// replace with "!!!" what was matched the 4th time by the group 2
// input: a1b2c3d4e5
// outp...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mlSchema("your xmlfile name");
第二种方法：
<aaa>
<add key="123" value="321"/>
</aaa>
如果我要找到123然后取到321应该怎么写呢？
using System.XML;
XmlDataDocument xmlDoc = new System.Xml.XmlDataDocument();
xmlDoc.Load(@"c:/Config.xml");
XmlElement elem = xmlDoc....
Using Java to find substring of a bigger string using Regular Expression
..._]*\s*\[([^\]]*)\]
This will validate things like Foo [Bar], or myDevice_123["input"] for instance.
Main issue
The main problem is when you want to extract the content of something like this:
FOO[BAR[CAT[123]]+DOG[FOO]]
The Regex won't work and will return BAR[CAT[123 and FOO.
If we change th...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
...tact.html
RewriteRule ^about$ about.php
Numeric identifiers /object/123
Introducing shortcuts like http://example.com/article/531 to existing PHP scripts is also easy. The numeric placeholder can just be remapped to a $_GET parameter:
RewriteRule ^article/(\d+)$ article-show.php?id=$1
...
What is a 'semantic predicate' in ANTLR?
...) throws Exception {
ANTLRStringStream in = new ANTLRStringStream("123, 456, 7 , 89");
NumbersLexer lexer = new NumbersLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumbersParser parser = new NumbersParser(tokens);
parser.parse();
}...