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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...cal order, i.e. sorting is performed by the first key, then the second key if the first one is equal, etc". Does this mean that the structure is stored such that a lookup for a specific 2-part composite key will take O(n=1) time, i.e. is the container sorted such that there is a pointer directl...
Difference between setTimeout with and without quotes and parentheses
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i think the setTimeout function that you write is not being run.
if you use jquery, you can make it run correctly by doing this :
function alertMsg() {
//your func
}
$(document).ready(function() {
setTimeout(alertMsg,3000);
// the function you called by ...
Defining and using a variable in batch file
...e. So the variable you’ve created can be referenced with %location %. If that’s not what you want, remove the extra space(s) in the definition.
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How do I trim whitespace from a string?
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Just one space, or all consecutive spaces? If the second, then strings already have a .strip() method:
>>> ' Hello '.strip()
'Hello'
>>> ' Hello'.strip()
'Hello'
>>> 'Bob has a cat'.strip()
'Bob has a cat'
>>> ' Hello '.strip()...
Where to place $PATH variable assertions in zsh?
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tl;dr version: use ~/.zshrc
And read the man page to understand the differences between:
~/.zshrc, ~/.zshenv and ~/.zprofile.
Regarding my comment
In my comment attached to the answer kev gave, I said:
This seems to be incorrect - /etc/profile isn't listed in any zsh documentati...
Difference between RegisterStartupScript and RegisterClientScriptBlock?
Is the only difference between the RegisterStartupScript and the RegisterClientScriptBlock is that RegisterStartupScript puts the javascript before the closing </form> tag of the page and RegisterClientScriptBlock puts it right after the starting <form> tag of the page?
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How to find the extension of a file in C#?
...ombination of both checks is probably a reasonable solution but ultimately if security is a concern then there should be more rigourous checks e.g. blocking unsigned files or content sampling.
– James
Feb 28 '18 at 18:41
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Is there any way in C# to override a class method with an extension method?
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@Alex by mentioning virtual I am simply clarifying what it means to be polymorphic. In virtually all uses of GetHashCode, the concrete type is unknown - so polymorphism is in play. As such, extension methods wouldn't help even if they took priority in the regular compi...
Volatile vs Static in Java
... be one variable for each Object. So, on the surface it seems there is no difference from a normal variable but totally different from static. However, even with Object fields, a thread may cache a variable value locally.
This means that if two threads update a variable of the same Object concurren...
How to pass password automatically for rsync SSH command?
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If you can not use a keyfile, but do not want to include the password in the command, you can write it into a temporary file and include it like this: sshpass -p`cat .password` ssh [...]. Then protect your .password file by c...