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Adding a column to a data.frame
...cording to column 1 ( h_no ) in that way that the first series of h_no 1,2,3,4 is class 1, the second series of h_no (1 to 7) is class 2 etc. such as indicated in the last column.
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Python function overloading
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What you are asking for is called multiple dispatch. See Julia language examples which demonstra...
StackOverflow程序员推荐：每个程序员都应读的30本书 - 杂谈 - 清泛网 - 专...
StackOverflow程序员推荐：每个程序员都应读的30本书如果能时光倒流，回到过去，作为一个开发人员，你可以告诉自己在职业生涯初期应该读一本，你会选择哪本书呢？我希望这个书单列表内容丰富，...“如果能时光倒流，回到过...
Failed to load the JNI shared Library (JDK)
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39 Answers
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What do two question marks together mean in C#?
...ull then the Answer is null):
string Answer = Answer1 ?? Answer2 ?? Answer3 ?? Answer4;
Also it's worth mentioning while the expansion above is conceptually equivalent, the result of each expression is only evaluated once. This is important if for example an expression is a method call with sid...
Extract a part of the filepath (a directory) in Python
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answered Apr 13 '12 at 23:01
Nisan.HNisan.H
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What is the best way to dump entire objects to a log in C#?
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What does the [Flags] Enum Attribute mean in C#?
...rs
{
Yellow, // 0
Green, // 1
Red, // 2
Blue // 3
}
The values, if declared this way, will be Yellow = 0, Green = 1, Red = 2, Blue = 3. This will render it useless as flags.
Here's an example of a correct declaration:
[Flags]
public enum MyColors
{
Yellow = 1,
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Make copy of an array
I have an array a which is constantly being updated. Let's say a = [1,2,3,4,5] . I need to make an exact duplicate copy of a and call it b . If a were to change to [6,7,8,9,10] , b should still be [1,2,3,4,5] . What is the best way to do this? I tried a for loop like:
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Converting JSONarray to ArrayList
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answered Jun 11 '13 at 5:55
Sagar MaiyadSagar Maiyad
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