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Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
... /dev/null
+++ b/DbConnector
@@ -0,0 +1 @@
+Subproject commit c3f01dc8862123d317dd46284b05b6892c7b29bc
虽然 DbConnector 是工作目录中的一个子目录，但 Git 还是会将它视作一个子模块。当你不在那个目录中时，Git 并不会跟踪它的内容， 而是将它...
Append a dictionary to a dictionary [duplicate]
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525
You can do
orig.update(extra)
or, if you don't want orig to be modified, make a copy first:
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Ruby, remove last N characters from a string?
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Ruby 2.5+
As of Ruby 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast and readable manner.
The docs on the methods are here.
If you know what the suffix is, this is idiomatic (and I'd argue, even more r...
Is there a difference between x++ and ++x in java?
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293
++x is called preincrement while x++ is called postincrement.
int x = 5, y = 5;
System.out....
How can I convert a dictionary into a list of tuples?
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>>> d = { 'a': 1, 'b': 2, 'c': 3 }
>>> d.items()
[('a', 1), ('c', 3), ('b', 2)]
>>> [(v, k) for k, v in d.iteritems()]
[(1, 'a'), (3, 'c'), (2, 'b')]
It's not in the order you want, but dicts don't have any specific order anyway...
Adding rounded corner and drop shadow to UICollectionViewCell
So I already went through various posts on adding 2nd view for adding shadow, but I still cannot get it to work if I want to add it in UICollectionViewCell . I subclassed UICollectionViewCell , and here is my code where I add various UI elements to the cell's content view and adding shadow to the ...
Select count(*) from multiple tables
...an I select count(*) from two different tables (call them tab1 and tab2 ) having as result:
18 Answers
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What is the difference between HashSet and List?
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215
Unlike a List<> ...
A HashSet is a List with no duplicate members.
Because a HashSet i...
Order data frame rows according to vector with specific order
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236
Try match:
df <- data.frame(name=letters[1:4], value=c(rep(TRUE, 2), rep(FALSE, 2)))
targe...
Delete multiple records using REST
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92
Is a viable RESTful choice, but obviously has the limitations you have described.
Don't do this...