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What is the difference between window, screen, and document in Javascript?
...at about the document object then? The document object is your html, aspx, php, or other document that will be loaded into the browser. The document actually gets loaded inside the window object and has properties available to it like title, URL, cookie, etc. What does this really mean? That means i...
Read whole ASCII file into C++ std::string [duplicate]
...lts.
Following KeithB's point in the comments, here's a way to do it that allocates all the memory up front (rather than relying on the string class's automatic reallocation):
#include <string>
#include <fstream>
#include <streambuf>
std::ifstream t("file.txt");
std::string str;...
What is the difference between the | and || or operators?
I have always used || (two pipes) in OR expressions, both in C# and PHP. Occasionally I see a single pipe used: | . What is the difference between those two usages? Are there any caveats when using one over the other or are they interchangeable?
...
capturing self strongly in this block is likely to lead to a retain cycle
...RING YOU TO RETAIN LOOP
}
};
and don't forget to do:
- (void)dealloc {
self.loadingCompletionHandler = NULL;
}
another issue can appear if you will pass weak copy of not retained by anybody object:
MyViewController *vcToGo = [[MyViewCOntroller alloc] init];
__weak MyViewController...
How to extract the substring between two markers?
...
If any of the tokens can't be found in the s, s.find will return -1. the slicing operator s[begin:end] will accept it as valid index, and return undesired substring.
– ribamar
Aug 28 '17 at 15:44
...
What is a “cache-friendly” code?
...ilar processors. In some cases, however, it can be worth doing things like allocating a large buffer, and then using only parts of what you allocated to ensure against data sharing the same cache lines (even though you'll probably need to detect the exact processor and act accordingly to do this).
...
What is the most efficient way to store tags in a database?
...ic items MUCH more simple. You don't have to create a new tag, remove the allocation of the old one and re-allocate a new one, you just edit the tagname.
For displaying a list of tags, you simply use DISTINCT or GROUP BY, and of course you can count how many times a tag is used easily, too.
...
Java Equivalent of C# async/await?
... = AsynchronousFileChannel.open(path);
ByteBuffer buffer = ByteBuffer.allocate(100_000);
await channel.read(buffer, 0, buffer, this);
return buffer.get(0);
}
Then I would imagine the compiler will transform the original async/await code into something like this:
public static Future&...
Real escape string and PDO [duplicate]
...escape_string() with the PDO::quote() method.
Here is an excerpt from the PHP website:
<?php
$conn = new PDO('sqlite:/home/lynn/music.sql3');
/* Simple string */
$string = 'Nice';
print "Unquoted string: $string\n";
print "Quoted string: " . $conn->quote($string) . "\n";...
How does this giant regex work?
...ently found the code below in one of my directories, in a file called doc.php . The file functions or links to a file manager. It's quite nicely done. Basically, it lists all the files in the current directory, and it lets you change directories.
...