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insert vs emplace vs operator[] in c++ map
I'm using maps for the first time and I realized that there are many ways to insert an element. You can use emplace() , operator[] or insert() , plus variants like using value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I sti...
What are invalid characters in XML
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The only illegal characters are &, < and > (as well as " or ' in attributes).
They're escaped using XML entities, in this case you want &amp; for &.
Really, though, you should use a tool or library that writes XML for you and abstracts this kind of ...
Rebasing a branch including all its children
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Doesn't the "git branch" command output a star before the current branch, screwing up this script if one of the branches to rebase is currently checked out?
– Mark Lodato
Dec 20 '12 at 21:38
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Retrieve specific commit from a remote Git repository
... on my PC? The structure of remote repo is absolutely same as that of mine and hence there won't be any conflicts but I have no idea how to do this and I don't want to clone that huge repository.
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How do you write multiline strings in Go?
... choice to write regular expression patterns as they usually contain non-standard escape sequences that would make the Go compiler complain of not double-escaped. It keeps the patterns clean and relatively readable.
– jimt
Oct 29 '11 at 1:35
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Get protocol, domain, and port from URL
I need to extract the full protocol, domain, and port from a given URL. For example:
18 Answers
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What are the best practices for using a GUID as a primary key, specifically regarding performance?
...have an application that uses GUID as the Primary Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly, I haven't seen any problem, but I'm about to start a new application and I still want to use the GUIDs as the Primary Keys, but...
Getting the first character of a string with $str[0]
I want to get the first letter of a string and I've noticed that $str[0] works great. I am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right –...
How to use random in BATCH script?
How to use random in BATCH script?
14 Answers
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Convert string to variable name in python [duplicate]
...mically create a variable, this is not the way to do it; just use setattr. And even when setattr is inappropriate for whatever reason, being explicit and modifying locals or globals as appropriate is still better than exec.
– abarnert
Oct 1 '13 at 17:57
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