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“unpacking” a tuple to call a matching function pointer
...<<b<<" "<<c<< std::endl; };
auto params = std::make_tuple(1,2.0,"Hello");
std::apply(f, params);
Just felt that should be stated once in an answer in this thread (after it already appeared in one of the comments).
The basic C++14 solution is still missing in this thread....
What does the “@” symbol do in Powershell?
...stion--to provide the full answer, to wit:
Array sub-expression (see about_arrays)
Forces the value to be an array, even if a singleton or a null, e.g. $a = @(ps | where name -like 'foo')
Hash initializer (see about_hash_tables)
Initializes a hash table with key-value pairs, e.g.
$HashArguments...
Why doesn't C have unsigned floats?
...e? -8. But what would that mean in a system without negative numbers. FLOAT_MAX - 8 perhaps? Actually, that doesn't work as FLOAT_MAX - 8 is FLOAT_MAX due to precision effects so things are even more screwy. What if it was part of a more complex expression:
float a = 2.0f, b = 10.0f, c = 20.0f, d =...
Devise form within a different controller
I am using a devise gem for sign_in/sign_out procedures.
5 Answers
5
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Explain Morris inorder tree traversal without using stacks or recursion
...checking for pre->right != current necessary?
– No_name
Mar 12 '13 at 1:18
6
I don't see why t...
How to add images in select list?
...
you're right, I got a my.hellobar.com/45874_63207.js not found error & then TypeError: $(...).ddslick is not a function in the Firefox's console
– RousseauAlexandre
Aug 28 '16 at 16:00
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Which characters are valid/invalid in a JSON key name?
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{ "*~@#$%^&*()_+=><?/": "is a valid json" }
– Abhi
Oct 7 '14 at 4:24
45
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Git: can I suppress listing of 'modified content'/dirty submodule entries in status, diff, etc?
...answered Aug 4 '11 at 2:19
kjell_kjell_
22133 silver badges77 bronze badges
...
Check if Python Package is installed
...n script, just do something like this:
Python 3.3+ use sys.modules and find_spec:
import importlib.util
import sys
# For illustrative purposes.
name = 'itertools'
if name in sys.modules:
print(f"{name!r} already in sys.modules")
elif (spec := importlib.util.find_spec(name)) is not None:
# ...
Ruby optional parameters
...mpty' attributes to methods. The closest you can get is to pass nil:
ldap_get(base_dn, filter, nil, X)
However, this will set the scope to nil, not LDAP::LDAP_SCOPE_SUBTREE.
What you can do is set the default value within your method:
def ldap_get(base_dn, filter, scope = nil, attrs = nil)
s...