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What is the difference between iterator and iterable and how to use them?
...ut what if I want to write a method whose return type is Iterable<T> then in this scenario what steps do we need to implement? Please suggest that example also.
– Prasanna Sasne
Jun 14 at 15:35
...
What is the equivalent of “none” in django templates?
...eturning None if there is no name (logical behaviour for a data model) and then using the default_if_none filter in the template?
– jbg
Nov 17 '13 at 23:46
...
Why remove unused using directives in C#?
...lue.
It's confusing. What is being used from that namespace?
If you don't, then you'll gradually accumulate pointless using statements as your code changes over time.
Static analysis is slower.
Code compilation is slower.
On the other hand, there aren't many reasons to leave them in. I suppose you...
How do I copy a hash in Ruby?
...but not the objects that the references refer to.
If you want a deep copy then:
def deep_copy(o)
Marshal.load(Marshal.dump(o))
end
h1 = {:a => 'foo'}
h2 = deep_copy(h1)
h1[:a] << 'bar'
p h2 # => {:a=>"foo"}
deep_copy works for any object that can be marshalled. ...
How to know when UITableView did scroll to bottom in iPhone
...owAtPoint:(CGPoint)point
Test a point near the bottom of the screen, and then using the indexPath it returns check if that indexPath is the last row then if it is, add rows.
share
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improve this ...
How can I run a program from a batch file without leaving the console open after the program starts?
...e is invis.vbs:
set args = WScript.Arguments
num = args.Count
if num = 0 then
WScript.Echo "Usage: [CScript | WScript] invis.vbs aScript.bat <some script arguments>"
WScript.Quit 1
end if
sargs = ""
if num > 1 then
sargs = " "
for k = 1 to num - 1
anArg = args.Ite...
Counting DISTINCT over multiple columns
...even smaller chance but still not zero. If those two Ids were int's (32b) then a "lossless hash" could combine them into an bigint (64b) like Id1 << 32 + Id2.
– crokusek
Jan 31 '14 at 19:35
...
Is log(n!) = Θ(n·log(n))?
... This is a great explanation! I could follow this until step 7, but then I cannot decode the mathemagic that happens between step 7 and step 8... :-(
– Z3d4s
Oct 31 '19 at 16:15
...
Adding VirtualHost fails: Access Forbidden Error 403 (XAMPP) (Windows 7)
.../VirtualHost>
After restarting the apache, it were still not working.
Then I had to follow the step 9 mentioned in the article by editing the file C:/Windows/System32/drivers/etc/hosts.
# localhost name resolution is handled within DNS itself.
127.0.0.1 localhost
::1 ...
How to do scanf for single char in C [duplicate]
...r example, if you input abc for an int such as: scanf("%d", &int_var); then abc will have to read and discarded. Consider:
#include <stdio.h>
int main(void)
{
int i;
while(1) {
if (scanf("%d", &i) != 1) { /* Input "abc" */
printf("Invalid input. Try again...