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How do I print the type of a variable in Rust?
...p.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatched types
--> src/main.rs:2:29
|
2 | let mut my_number: () = 32.90;
| ^^^^^ expected (), found floating-point n...
Captured variable in a loop in C#
...riencing is something known as Closure http://en.wikipedia.org/wiki/Closure_(computer_science). Your lamba has a reference to a variable which is scoped outside the function itself. Your lamba is not interpreted until you invoke it and once it is it will get the value the variable has at execution t...
How do I count the number of occurrences of a char in a String?
...n Android, where there is no StringUtils class
– Jose_GD
Nov 6 '12 at 13:12
43
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How do I check two or more conditions in one ?
...answered Dec 2 '11 at 11:44
olly_ukolly_uk
10.2k33 gold badges3737 silver badges4545 bronze badges
...
Getting multiple keys of specified value of a generic Dictionary?
...e, perhaps maintain two dictionary mapping key->value and value->List_of_keys. If you do the latter you will trade storage for look up speed. It wouldn't take much to turn @Cybis example into such a data structure.
s...
How to use mod operator in bash?
... answered Mar 31 '14 at 4:06
h__h__
81588 silver badges1818 bronze badges
...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
...othername".
Stop the machine from provisioning:
Create a file named action_provision in the same dir as the id file, set it's contents to: 1.5:{id} replacing {id} with the id found in step 1.
Setup a new public/private key:
Vagrant uses a private key stored in .vagrant/machines/default/virtualbox/...
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
... # change this to desired chunk size
for page in range(1, paginator.num_pages + 1):
for row in paginator.page(page).object_list:
# here you can do whatever you want with the row
print "done processing page %s" % page
...
What are the rules for the “…” token in the context of variadic templates?
...rgs...) above!
You can use ... to initialize an array also as:
struct data_info
{
boost::any data;
std::size_t type_size;
};
std::vector<data_info> v{{args, sizeof(T)}...}; //pattern = {args, sizeof(T)}
which is expanded to this:
std::vector<data_info> v
{
{arg0, sizeo...
ORA-30926: unable to get a stable set of rows in the source tables
...ates in the query specified in USING clause. This probably means that TABLE_A is a parent table and the same ROWID is returned several times.
You could quickly solve the problem by using a DISTINCT in your query (in fact, if 'Y' is a constant value you don't even need to put it in the query).
Assu...