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When UTF8 emoji character is removed from NSMutableString the conversion to std::string fails


When UTF8 emoji character is removed from NSMutableString the conversion to std::string fails

By : Ese Erigha
Date : November 22 2020, 02:42 PM
Does that help NSString assumes that strings are made of 16 bit units. For Emoji characters that is not true, they are made of two 16 bit units. If the last character of a string is an Emoji character, and you decrease the length by one, then you have a string ending in half an emoji character, which is not valid Unicode. From then on things will go wrong.
All the first 65536 Unicode code points will be fine. All code points from U10000 upwards (not just Emoji) will have problems. So your assumption is close and identifies the problem. It's just rarer than you thought which is both good and bad :-)
code :


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C++ : String to Character Array conversion (non-Ascii characters removed)

C++ : String to Character Array conversion (non-Ascii characters removed)


By : Rebecca Lee
Date : March 29 2020, 07:55 AM
Does that help The problem is that on Linux char is always in the range -128-127, so your invalidChar function will return true for all the chars not strictly ASCII. If you want to check for extended ASCII (0-255) then your function is useless: every char value is in the extended ASCII set; however, since char is signed you need to check for negative values.
Python unicode character conversion for Emoji

Python unicode character conversion for Emoji


By : Tchesko
Date : March 29 2020, 07:55 AM
it should still fix some issue I'm having some issues with formatting a byte ordered mark to unicode. There is some oddness coming in with how my character is being expressed. Basically it's not printing an emoji character in Python, instead it's just the string. Here's my example. , I guess decode is what you are looking for,
code :
>>> b = '\U0001F600'
>>> print b.decode('unicode-escape')

>>> print unicode(b, 'unicode-escape')

print unicode(b)
R- How do I convert an UTF8 encoded emoji character to an image?

R- How do I convert an UTF8 encoded emoji character to an image?


By : user210190
Date : March 29 2020, 07:55 AM
Hope that helps Another solution to get to the png files of the emojis is to download them from Twitter, which accepts runes in the urls linking to the png files:
code :
library(tidyverse)
data <- tibble(emojis = c("","","","","")) %>% 
  mutate(rune = map_chr(emojis, ~ utf8splain::runes(.)$rune)) %>%    # convert to runes
  mutate(rune = str_remove(rune, fixed("U+"))) %>%                   # remove leading U+
  mutate(emoji_url = paste0("https://abs.twimg.com/emoji/v2/72x72/", # make url
                            tolower(rune), ".png"))

# download the files
map2(data$emoji_url, paste0(data$rune, ".png"), function(x, y) download.file(x, y, method = "curl"))
emojis <- c("","","","","")
rune <- sapply(emojis, function(x) utf8splain::runes(x)$rune)
emojiurl <- paste0("https://abs.twimg.com/emoji/v2/72x72/", tolower(rune), ".png")

for (i in seq_along(emojiurl)) {
  download.file(emojiurl[i], paste0(rune[i], ".png"), method = "curl")
}
Converting a string character-by-character to an NSMutableString in loop

Converting a string character-by-character to an NSMutableString in loop


By : Ankit Gadhiya
Date : March 29 2020, 07:55 AM
like below fixes the issue Your for loop goes beyond the length of the string. Arrays are zero-based, so the last object has the index [gameWord length] - 1.
This should work:
NodeJS UTF8 String appears as ?? instead of emoji

NodeJS UTF8 String appears as ?? instead of emoji


By : Pankaj
Date : March 29 2020, 07:55 AM
wish of those help Found a solution after playing around with various settings. When you connect to the MySQL server, you must specify the preference charset: 'utf8mb4' like so:
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