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What is the difference between packaged_task and async
...c and ~future, which describes the problem, and Scott Meyer's std::futures from std::async aren't special, which describes the insights. Also do note that this behavior was specified in C++14 and up, but also commonly implemented in C++11.
Further differences
By using std::async you cannot run you...
Why is “while ( !feof (file) )” always wrong?
...n point", if you will.)
EOF
Now we get to EOF. EOF is the response you get from an attempted I/O operation. It means that you were trying to read or write something, but when doing so you failed to read or write any data, and instead the end of the input or output was encountered. This is true for e...
Insert a line at specific line number with sed or awk
...t vs. append is achieved with '8isomething' vs. '8asomething', independent from the -i-switch.
– user unknown
Dec 23 '14 at 1:28
11
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Database sharding vs partitioning
...ted out partitioned on very few servers, using Postgres to divide the data from the get-go. I believe it was several thousand logical shards on those few physical shards. Read their awesome writeup from 2012 here: Instagram Engineering - Sharding & IDs
See here as well: http://www.quora.com/Wha...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
...
See the bit twiddling hacks for many solutions. Copypasting from there is obviously simple to implement. =)
For example (on a 32-bit CPU):
uint8_t b = byte_to_reverse;
b = ((b * 0x0802LU & 0x22110LU) | (b * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16;
If by “simple to...
append to url and refresh page
...you are indeed correct...srry about that. "+=" of coarse...missed that. +1 from me.
– greaterKing
Jan 11 '17 at 15:27
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Learning Ruby on Rails
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I've been moving from C# in my professional career to looking at Ruby and RoR in my personal life, and I've found linux to be slightly more appealing personally for development. Particularly now that I've started using git, the implementatio...
Showing a different background colour in Vim past 80 characters
...nt to use to highlight >80 columns, and set colorcolumn for all columns from 1-80, and set the highlight group for colorcolumn to be the color you want your normal background to be.
– mkomitee
Jan 11 '12 at 13:20
...
How to get the number of Characters in a String?
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You can try RuneCountInString from the utf8 package.
returns the number of runes in p
that, as illustrated in this script: the length of "World" might be 6 (when written in Chinese: "世界"), but its rune count is 2:
package main
import "fmt"
import "...
Convert tuple to list and back
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Why don't you try converting its type from a tuple to a list and vice versa.
level1 = (
(1,1,1,1,1,1)
(1,0,0,0,0,1)
(1,0,0,0,0,1)
(1,0,0,0,0,1)
(1,0,0,0,0,1)
(1,1,1,1,1,1))
print(level1)
level1 = list(level1)
print(level1)
level...