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What is the use case of noop [:] in bash?
I searched for noop in bash (:), but was not able to find any good information. What is the exact purpose or use case of this operator?
...
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
...--git a/DbConnector b/DbConnector
new file mode 160000
index 0000000..c3f01dc
--- /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...
delete vs delete[] operators in C++
...ABC *ptr = new ABC[100]
when we say new ABC[100], compiler can get the information about how many objects that needs to be allocated(here it is 100) and will call the constructor for each of the objects created
but correspondingly if we simply use delete ptr for this case, compiler will not know ...
Recursion or Iteration?
Is there a performance hit if we use a loop instead of recursion or vice versa in algorithms where both can serve the same purpose? Eg: Check if the given string is a palindrome.
I have seen many programmers using recursion as a means to show off when a simple iteration algorithm can fit the bill.
D...
Python append() vs. + operator on lists, why do these give different results?
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+1 because I always upvote accurate information. Links to official docs are always a plus!
– jathanism
Jan 7 '10 at 17:09
10
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Getter and Setter declaration in .NET [duplicate]
...r set, then use the first.
In the end, the first and second are just some form of syntactic sugar, but why code more than what's necessary.
// more code == more bugs
And just to have a little fun, consider this:
public string A { get; private set; }
Now that's a lot more straight forward isn'...
Tools to search for strings inside files without indexing [closed]
...In my case I had to complement adding some arguments because is too much information to appear on the screen. The argument /M lists just the file name that has the information that I was looking for. To access the manual of findstr command, type "findstr /?" in the console.
– A...
How to create P12 certificate for iOS distribution
...mail blank and select “Saved to disk” and “Let me specify key pair information”
Click Continue
Choose a filename & destination on your hard drive
Click Save
In the next window, set “Key Size” value to “2048 bits”
Set “Algorithm” to “RSA”
Click Continue
This will create ...
How to reference constants in EL?
...rks. And you need to make absolutely sure that your web.xml is declared conform the latest servlet version supported by the server. Thus with a web.xml which is declared conform Servlet 2.5 or older, none of the Servlet 3.0+ features will work.
Also note that this facility is only available in JSP ...
How to calculate the angle between a line and the horizontal axis?
...tion:
angleInDegrees = atan2(deltaY, deltaX) * 180 / PI
EDIT (Feb. 22, 2017): In general, however, calling atan2(deltaY,deltaX) just to get the proper angle for cos and sin may be inelegant. In those cases, you can often do the following instead:
Treat (deltaX, deltaY) as a vector.
Normalize th...