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Ruby: kind_of? vs. instance_of? vs. is_a?
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kind_of? and is_a? are synonymous.
instance_of? is different from the other two in that it only returns true if the object is an instance of that exact class, not a subclass.
Example:
"hello".is_a? Object and "hello".kind_of? Obje...
Can I make fast forwarding be off by default in git?
...ever think of a time when I would use git merge rather than git rebase and not want to have a commit show up. Is there any way to configure git to have fast forwarding off by default? The fact that there's an --ff option would seem to imply that there's a way, but I can't seem to find it i...
Django ModelForm: What is save(commit=False) used for?
...lse) instead of just creating a form object from the ModelForm subclass and running is_valid() to validate both the form and model?
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How do I get the user agent with Flask?
...ary seems to fit the bill of collecting a lot of information out of flask, and has example calls to getting this information out of the application context.
https://pythonhosted.org/Flask-Track-Usage/
Usage gets stored in this format:
[
{
'url': str,
'user_agent': {
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Passing arguments forward to another javascript function
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does not make sense to use "args" and "arguments" together...
– dude
Jan 9 '15 at 9:59
3
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Any equivalent to .= for adding to beginning of string in PHP?
...rn $string;
}
}
$string would be the piece that you want to prepend and $chunk would be the text that you want something prepended onto it.
You could say the checks are optional, but by having that in there you don't need to worry about passing in a null value by accident.
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Should struct definitions go in .h or .c file?
I've seen both full definitions of struct s in headers and just declarations—is there any advantage to one method over the other?
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How to un-commit last un-pushed git commit without losing the changes
...e to dig it from reflog in case you screw up :) )
revert commit normally and push
git checkout master
git revert a8172f36 #hash of the commit you want to destroy
# this introduces a new commit (say, it's hash is 86b48ba) which removes changes, introduced in the commit in question (but those chan...
Hibernate openSession() vs getCurrentSession()
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As explained in this forum post, 1 and 2 are related. If you set hibernate.current_session_context_class to thread and then implement something like a servlet filter that opens the session - then you can access that session anywhere else by using the SessionFa...
Change timestamps while rebasing git branch
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@Tim The root commit does not have a parent, and when I asked this question I also wanted to change the date of that commit. Now we have --root, which makes this possible.
– tarsius
Nov 26 '15 at 1:24
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