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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...r.parseInt("123");
This returns an int primitive value after parsing the String.
Integer.valueOf("123");
This is more complex than the others. It starts off by parsing the String. Then, if the value is between -128 and 127, it returns the corresponding object from the static cache. If the va...
数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...词：
public class TestPositiveMatch {
public static void main(String[] args) {
String str = "我爱这个中华人民共和国大家庭";
List normalDict = new ArrayList();
normalDict.add("");
normalDict.add("爱");
normalDict.add("中华");...
Using C# regular expressions to remove HTML tags
...express nested structures in a general way.
You could use the following.
String result = Regex.Replace(htmlDocument, @"<[^>]*>", String.Empty);
This will work for most cases, but there will be cases (for example CDATA containing angle brackets) where this will not work as expected.
...
Query-string encoding of a Javascript Object
Do you know a fast and simple way to encode a Javascript Object into a string that I can pass via a GET Request?
40 Ans...
java.nio.file.Path for a classpath resource
...API to get a classpath resource (e.g. what I'd get from Class.getResource(String) ) as a java.nio.file.Path ? Ideally, I'd like to use the fancy new Path APIs with classpath resources.
...
Windows path in Python
...s
'C:\\mydir'
if you have problems with some names you can also try raw string literals:
r'C:\mydir'
however best practice is to use the os.path module functions that always select the correct configuration for your OS:
os.path.join(mydir, myfile)
From python 3.4 you can also use the pathli...
Purpose of Activator.CreateInstance with example?
...w:
class MyFancyObject
{
public int A { get;set;}
}
It lets you turn:
String ClassName = "MyFancyObject";
Into
MyFancyObject obj;
Using
obj = (MyFancyObject)Activator.CreateInstance("MyAssembly", ClassName))
and can then do stuff like:
obj.A = 100;
That's its purpose. It also has ma...
How do you access the matched groups in a JavaScript regular expression?
I want to match a portion of a string using a regular expression and then access that parenthesized substring:
22 Answers...
C# 4.0 optional out/ref arguments
...ters, and which just calls your current method.
public bool SomeMethod(out string input)
{
...
}
// new overload
public bool SomeMethod()
{
string temp;
return SomeMethod(out temp);
}
If you have C# 7.0, you can simplify:
// new overload
public bool SomeMethod()
{
return SomeMetho...
Gson: Directly convert String to JsonObject (no POJO)
...in GSON, but I have a case where I do not know or have a POJO to convert a string into, prior to converting to JsonObject . Is there a way to go directly from a String to JsonObject ?
...