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Logical XOR operator in C++?
...XOR evaluation, as you understand, cannot be short-circuited since the result always depends on both operands. So 1 is out of question. But what about 2? If you don't care about 2, then with normalized (i.e. bool) values operator != does the job of XOR in terms of the result. And the operands can be...
How do I change the cursor between Normal and Insert modes in Vim?
... (see :help cursorline):
:autocmd InsertEnter,InsertLeave * set cul!
or, alternatively:
:autocmd InsertEnter * set cul
:autocmd InsertLeave * set nocul
Modify the CursorLine highlighting group to change the styling
of the cursor line to your liking (see :help :highlight and
:help highlight-groups)...
Detect if stdin is a terminal or pipe?
...
Use isatty:
#include <stdio.h>
#include <io.h>
...
if (isatty(fileno(stdin)))
printf( "stdin is a terminal\n" );
else
printf( "stdin is a file or a pipe\n");
(On windows they're prefixed with underscores: _isatty, _fileno...
EF LINQ include multiple and nested entities
...cs.microsoft.com/en-us/ef/core/querying/related-data
Note:
Say you need multiple ThenInclude() on blog.Posts, just repeat the Include(blog => blog.Posts) and do another ThenInclude(post => post.Other).
var blogs = context.Blogs
.Include(blog => blog.Posts)
.ThenInclude(post =&...
Why does Chrome incorrectly determine page is in a different language and offer to translate?
...vious what your site's language is.
Use the following which seems to help although Content-Language is deprecated and Google says they ignore lang
<html lang="en" xml:lang="en" xmlns= "http://www.w3.org/1999/xhtml">
<meta charset="UTF-8">
<meta name="google" content="notranslate">...
How to find out if an item is present in a std::vector?
...
You can use std::find from <algorithm>:
#include <vector>
vector<int> vec;
//can have other data types instead of int but must same datatype as item
std::find(vec.begin(), vec.end(), item) != vec.end()
This returns a bool (true if...
What does “|=” mean? (pipe equal operator)
...ing using Google Search and Stack Overflow, but it didn't show up any results. I have seen this in opensource library code:
...
DynamoDB vs MongoDB NoSQL [closed]
...ynamo, if you need more throughput, you just click a button. You can write scripts to scale automatically. When it's time to upgrade Dynamo, it's done for you. That is all a lot of precious stress and time not spent. If you don't have dedicated ops people, Dynamo is excellent.
So we are now going o...
Numbering rows within groups in a data frame
...
Use ave, ddply, dplyr or data.table:
df$num <- ave(df$val, df$cat, FUN = seq_along)
or:
library(plyr)
ddply(df, .(cat), mutate, id = seq_along(val))
or:
library(dplyr)
df %>% group_by(cat) %>% mutate(id = row_number())
or (the most memory efficient, as ...
Sort a Custom Class List
...
One way to do this is with a delegate
List<cTag> week = new List<cTag>();
// add some stuff to the list
// now sort
week.Sort(delegate(cTag c1, cTag c2) { return c1.date.CompareTo(c2.date); });
...