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What are C++ functors and their uses?
...eate objects which "look like" a function:
// this is a functor
struct add_x {
add_x(int val) : x(val) {} // Constructor
int operator()(int y) const { return x + y; }
private:
int x;
};
// Now you can use it like this:
add_x add42(42); // create an instance of the functor class
int i = add...
Efficient way to determine number of digits in an integer
...zation optimization for 32-bit numbers
template<>
int numDigits(int32_t x)
{
if (x == MIN_INT) return 10 + 1;
if (x < 0) return numDigits(-x) + 1;
if (x >= 10000) {
if (x >= 10000000) {
if (x >= 100000000) {
if (x >= 1000000000)
...
node.js: read a text file into an array. (Each line an item in the array.)
...ade by Windows, I had to split \r\n but that broke Macs; so a more robust; _array = string.replace(/\r\n/g,'\n').split('\n'); worked for both
– Will Hancock
May 5 '15 at 15:37
6
...
How to call asynchronous method from synchronous method in C#?
... deadlock anymore.
Here is my code:
public class LogReader
{
ILogger _logger;
public LogReader(ILogger logger)
{
_logger = logger;
}
public LogEntity GetLog()
{
Task<LogEntity> task = Task.Run<LogEntity>(async () => await GetLogAsync());
...
Effects of changing Django's SECRET_KEY
I made a mistake and committed my Django project's SECRET_KEY into a public repository.
5 Answers
...
How to sort in mongoose?
...work in mongoose 2.3.0 :)
// Find First 10 News Items
News.find({
deal_id:deal._id // Search Filters
},
['type','date_added'], // Columns to Return
{
skip:0, // Starting Row
limit:10, // Ending Row
sort:{
date_added: -1 //Sort by Date Added DESC
}
},
function(err,allNews...
How does one remove an image in Docker?
...s using windows powershell: docker ps -aq | Foreach-Object { docker stop $_; docker rm $_; }
– fartwhif
Dec 16 '18 at 22:00
add a comment
|
...
Named placeholders in string formatting
...make one single pass through the format string.
– 200_success
May 15 '18 at 14:24
@200_success Yes good point talking ...
How to git-cherry-pick only changes to certain files?
...st other methods I have come across.
In principle:
git checkout <other_branch_name> <files/to/grab in/list/separated/by/spaces> -p
example:
git checkout mybranch config/important.yml app/models/important.rb -p
You then get a dialog asking you which changes you want in "blobs" this...
Match whitespace but not newlines
...usr/bin/env perl
use strict;
use warnings;
use 5.005; # for qr//
my $ws_not_crlf = qr/[^\S\r\n]/;
for (' ', '\f', '\t', '\r', '\n') {
my $qq = qq["$_"];
printf "%-4s => %s\n", $qq,
(eval $qq) =~ $ws_not_crlf ? "match" : "no match";
}
Output:
" " => match
"\f" => match
"\t" ...