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Check if character is number?
...arseInt and than check with isNaN
or if you want to work directly on your string you can use regexp like this:
function is_numeric(str){
return /^\d+$/.test(str);
}
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Difference between \n and \r?
...al results in this output NOPdefghijlm. The \r (carriage return) in the string results in the cursor moving to the beginning of the line (carriage) and the characters following the \r (i.e. "NOP") overwrite what was previously there (i.e. the "abc")! You can achieve similar "carriage movement" wi...
How can I pad a String in Java?
Is there some easy way to pad Strings in Java?
30 Answers
30
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windows C++ gbk转为utf-8 - C/C++ - 清泛网 - 专注C/C++及内核技术
...码转换为linux使用的utf8格式的，否则会出现乱码。
//m_string是windows下的中文字符串
//utf8_string是返回转换为utf8编码的中文字符串
//slen是utf8_string字符数组的大小
int multichar_2_utf8(const char *m_string,char *utf8_string,int slen) {
int le...
Difference between fprintf, printf and sprintf?
...char *, "format", args) is like printf. Instead of displaying the formated string on the standard output i.e. a monitor, it stores the formated data in a string pointed to by the char pointer (the very first parameter). The string location is the only difference between printf and sprint syntax.
fpr...
How to create an array from a CSV file using PHP and the fgetcsv function
...
I have created a function which will convert a csv string to an array. The function knows how to escape special characters, and it works with or without enclosure chars.
$dataArray = csvstring_to_array( file_get_contents('Address.csv'));
I tried it with your csv sample and...
Returning an array using C
...nd of the sizeof or unary & operators, or if the array expression is a string literal being used to initialize another array in a declaration.
Among other things, this means that you cannot pass an array expression to a function and have it received as an array type; the function actually rec...
Why does appending “” to a String save memory?
I used a variable with a lot of data in it, say String data .
I wanted to use a small part of this string in the following way:
...
Trying to embed newline in a variable in bash [duplicate]
... Append
unset first_loop
done
echo -e "$p" # Use -e
Avoid extra leading newline
var="a b c"
first_loop=1
for i in $var
do
(( $first_loop )) && # "((...))" is bash specific
p="$i" || # First -> Set
p="$p\n$i" # After -> Append
unset ...
What is the canonical way to check for errors using the CUDA runtime API?
...functions like cudaGetLastError , cudaPeekAtLastError , and cudaGetErrorString , but what is the best way to put these together to reliably catch and report errors without requiring lots of extra code?
...