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Circular (or cyclic) imports in Python
...be partly empty.
Finally, the executing script runs in a module named __main__, importing
the script under its own name will create a new module unrelated to
__main__.
Take that lot together and you shouldn't get any surprises when importing
modules.
...
Cost of len() function
...s, not C terms]: look up "len" in a dictionary and dispatch it to the built_in len function which will look up the object's __len__ method and call that ... all it has to do is return self.length
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Which is more efficient, a for-each loop, or an iterator?
...nswered Mar 17 '18 at 9:45
denis_lordenis_lor
5,10144 gold badges1717 silver badges4141 bronze badges
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How to Apply Gradient to background view of iOS Swift App
...rray <AnyObject> = [colorTop, colorBottom]
– JP_
Sep 9 '14 at 6:46
7
for swift 1.0 the synt...
How to convert a string or integer to binary in Ruby?
...
You have Integer#to_s(base) and String#to_i(base) available to you.
Integer#to_s(base) converts a decimal number to a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to...
How to change Navigation Bar color in iOS 7?
... Guide
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
// iOS 6.1 or earlier
self.navigationController.navigationBar.tintColor = [UIColor redColor];
} else {
// iOS 7.0 or later
self.navigationController.navigationBar.barTintCo...
What is the use of static constructors?
...an that static constructors are thread safe?
– Johnny_D
May 21 '13 at 9:37
1
@Johnny_D pretty sur...
Encode String to UTF-8
...
How about using
ByteBuffer byteBuffer = StandardCharsets.UTF_8.encode(myString)
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Where are static variables stored in C and C++?
... 00 00 00 mov 0x0(%rip),%eax # a <f+0xa>
6: R_X86_64_PC32 .data-0x4
and the .data-0x4 says that it will go to the first byte of the .data segment.
The -0x4 is there because we are using RIP relative addressing, thus the %rip in the instruction and R_X86_64_PC32.
...
Sorting a tab delimited file
... Ruby. Here's some example code:
#!/usr/bin/perl -w
use strict;
my $sort_field = 2;
my $split_regex = qr{\s+};
my @data;
push @data, "7 8\t 9";
push @data, "4 5\t 6";
push @data, "1 2\t 3";
my @sorted_data =
map { $_->[1] }
sort { $a->[0] <=> $b->[0] }
map { [ ( sp...