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C++ include and import difference
...sed with .NET / CLI stuff.
Import in gcc:
The import in gcc is different from the import in VC++. It is a simple way to include a header at most once only. (In VC++ and GCC you can do this via #pragma once as well)
The #import directive was officially undeprecated by the gcc team in version 3.4 ...
How can I reverse a NSArray in Objective-C?
...rse any NSMutableArray in place:
/* Algorithm: swap the object N elements from the top with the object N
* elements from the bottom. Integer division will wrap down, leaving
* the middle element untouched if count is odd.
*/
for(int i = 0; i < [array count] / 2; i++) {
int j = [array co...
(-2147483648> 0) returns true in C++?
...t can: 2147483648 has unsigned int ???? type.
In the second you force int from the unsigned.
const bool i= (-2147483648 > 0) ; // --> true
warning C4146: unary minus operator applied to unsigned type, result still unsigned
Here are related "curiosities":
const bool b= (-21474836...
are there dictionaries in javascript like python?
...
If the value comes from the user, then care needs to be taken to use Object.hasOwnProperty.call(dictionary, key) (otherwise the user can enter a value of valueOf and dictionary['valueOf'] returns the Object.valueOf() function belonging to the O...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...gBuffer);
// convert ArrayBuffer to Array
const hashArray = Array.from(new Uint8Array(hashBuffer));
// convert bytes to hex string
const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
return hashHex;
}
Note that crypto.subtle in...
How to convert unix timestamp to calendar date moment.js
...
UNIX timestamp it is count of seconds from 1970, so you need to convert it to JS Date object:
var date = new Date(unixTimestamp*1000);
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How to do scanf for single char in C [duplicate]
In C:
I'm trying to get char from the user with scanf and when I run it the program don't wait for the user to type anything...
...
Disable Interpolation when Scaling a
...
I’m (from the present future!) on Chrome 78. I’m seeing “image-rendering: pixelated;” working. It looks like this was added in 2015 to Chrome 41: developers.google.com/web/updates/2015/01/pixelated
– Mr...
How to version REST URIs
...
Ah, I'm putting my old grumpy hat on again.
From a ReST perspective, it doesn't matter at all. Not a sausage.
The client receives a URI it wants to follow, and treats it as an opaque string. Put whatever you want in it, the client has no knowledge of such a thing as a...
Escape angle brackets in a Windows command prompt
...sion
set "line=<html>"
echo !line!
Or you could use a FOR /F loop. From the command line:
for /f "delims=" %A in ("<html>") do @echo %~A
Or from a batch script:
@echo off
for /f "delims=" %%A in ("<html>") do echo %%~A
The reason these methods work is because both delayed e...