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Can I browse other people's (Apple) bug reports? [closed]
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Which is all well and good, but since you don't know it's a duplicate til they email you back and tell you, I've found you should just file all the bugs you find.
– rustyshelf
Oct 2 '08 at 7:13
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Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
...t)(i + l);
I just checked the .class file code.
Really a good thing to know
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C++ Structure Initialization
... Really bad idea: add one member to your address and you'll never know of all the places that create an address and now do not initialize your new member.
– mystery_doctor
May 7 '19 at 6:13
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How do I declare class-level properties in Objective-C?
Maybe this is obvious, but I don't know how to declare class properties in Objective-C.
10 Answers
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How to ssh to vagrant without actually running “vagrant ssh”?
...$(vagrant ssh-config | grep Port | grep -o '[0-9]\+')
ssh -q \
-o UserKnownHostsFile=/dev/null \
-o StrictHostKeyChecking=no \
-i ~/.vagrant.d/insecure_private_key \
vagrant@localhost \
-p $PORT \
"$@"
As a one-liner (with thanks to kgadek):
ssh $(vagrant ssh-config | awk ...
How to rename files and folder in Amazon S3?
... wrong comment has 15 upvotes. It should be deleted. Edit: And it was just now deleted. Nice.
– Doug S
Aug 24 '18 at 1:08
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Remove characters except digits from string using Python?
... up by 7-8 times is hardly peanuts, so the translate method is well worth knowing and using. The other popular non-RE approach...:
$ python -mtimeit -s'x="aaa12333bb445bb54b5b52"' '"".join(i for i in x if i.isdigit())'
100000 loops, best of 3: 11.5 usec per loop
is 50% slower than RE, so the .tra...
When is del useful in python?
...ariable makes the intent clearer. Compare:
del foo
to
foo = None
I know in the case of del foo that the intent is to remove the variable from scope. It's not clear that foo = None is doing that. If somebody just assigned foo = None I might think it was dead code. But I instantly know what som...
How can I trigger a JavaScript event click
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UPDATE
This was an old answer. Nowadays you should just use click. For more advanced event firing, use dispatchEvent.
const body = document.body;
body.addEventListener('click', e => {
console.log('clicked body');
});
console.log('Using cl...
How do I compute derivative using Numpy?
...**2 + 1
def d_fun(x):
h = 1e-5
return (fun(x+h)-fun(x-h))/(2*h)
Now, you can numerically find the derivative at x=5:
In [1]: d_fun(5)
Out[1]: 9.999999999621423
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