大约有 3,000 项符合查询结果（耗时：0.0219秒） [XML]
Simple Digit Recognition OCR in OpenCV-Python
... to use KNearest for simple OCR purposes).
1) My first question was about letter_recognition.data file that comes with OpenCV samples. I wanted to know what is inside that file.
It contains a letter, along with 16 features of that letter.
And this SOF helped me to find it. These 16 features are e...
std::string to char*
...
The answer is bulky, inelegant, non-local, uses raw arrays, and requires attention to exception safety. vector was invented precisely as a wrapper for dynamic arrays, so not using it seems like a missed opportunity at best, and in violation of the spirit of C++ at worst.
...
Receive JSON POST with PHP
...
Use $HTTP_RAW_POST_DATA instead of $_POST.
It will give you POST data as is.
You will be able to decode it using json_decode() later.
share
|
...
req.body empty on posts
...
This worked for me, why wasn't it working with raw encoded though?
– Daniel Kobe
Aug 1 '16 at 1:35
13
...
Is there a way to style a TextView to uppercase all of its letters?
...r style to a TextView that will make whatever text it has in ALL CAPITAL LETTERS.
7 Answers
...
vim deleting backward tricks
... two-character-commands to delete a word backwards when you're at the last letter, because in standard editors like notepad++, gedit etc. you can easily use CTRL+Backspace... except from that vim is excellent.
– itmuckel
Jul 4 '15 at 9:35
...
Generic type parameter naming convention for Java (with multiple chars)?
...ming Conventions
By convention, type parameter names are single, uppercase letters. This stands in sharp contrast to the variable naming conventions that you already know about, and with good reason: Without this convention, it would be difficult to tell the difference between a type variable and an...
Quickly reading very large tables as dataframes
...'s my test code:
Set up the test data:
bigdf <- data.frame(dim=sample(letters, replace=T, 4e7), fact1=rnorm(4e7), fact2=rnorm(4e7, 20, 50))
write.csv(bigdf, 'bigdf.csv', quote = F)
I restarted R before running the following import routine:
library(sqldf)
f <- file("bigdf.csv")
system.time...
How to convert a string to lower or upper case in Ruby
...!".downcase #=> "hello james!"
Similarly, upcase capitalizes every letter and capitalize capitalizes the first letter of the string but lowercases the rest:
"hello James!".upcase #=> "HELLO JAMES!"
"hello James!".capitalize #=> "Hello james!"
"hello James!".titleize #=> "H...
What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?
... taken together form one amino acid. There’s also a table of which three letters form which amino acid.
There’s nothing secret about this code.
Likewise, Base64 is not a secret code. Rather, it’s a code that allows storing data in six bits per character (thus there are 64 different entities,...