大约有 43,000 项符合查询结果（耗时：0.0255秒） [XML]
Stripping everything but alphanumeric chars from a string in Python
What is the best way to strip all non alphanumeric characters from a string, using Python?
11 Answers
...
How do you echo a 4-digit Unicode character in Bash?
... the magic incantation to make echo spit it, or any other, 4-digit Unicode character. Two-digit one's are easy. For example, echo -e "\x55", .
...
Common MySQL fields and their appropriate data types
... that is either an ID or references another ID
DATETIME for time stamps
VARCHAR(255) for anything guaranteed to be under 255 characters (page titles, names, etc)
TEXT for pretty much everything else.
Of course there are exceptions, but I find that covers most eventualities.
...
How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
... I wonder if there are progress towards a locale independent and/or locale selectable version of std::to_string(). The cppreference page still link only to std::to_chars(), which is not really what people need. I wonder if fmt and/or c++20 deal with it or not yet.
– ceztko
...
Purpose of Unions in C and C++
... @legends2k: any decent optimizer will recognize bitwise operations that select an entire byte and generate code to read/write the byte, same as the union but well-defined (and portable). e.g. uint8_t getRed() const { return colour & 0x000000FF; } void setRed(uint8_t r) { colour = (colour &...
How does one create an InputStream from a String? [duplicate]
...hoose UTF-8 if you don't specifically need anything else. Otherwise if you select nothing you'll get the default encoding that can vary between systems. From the JavaDoc:
The behavior of this method when this string cannot be encoded in the default charset is unspecified. The CharsetEncoder clas...
How to split a string with any whitespace chars as delimiters
...lit() to split a String into an Array of substrings using all whitespace characters ( ' ' , '\t' , '\n' , etc.) as delimiters?
...
Read Excel File in Python
...ues for a given column
values = df['Arm_id'].values
#get a data frame with selected columns
FORMAT = ['Arm_id', 'DSPName', 'Pincode']
df_selected = df[FORMAT]
share
|
improve this answer
|...
Entity framework self referencing loop detected [duplicate]
...anonymous type with the props you want
example (psuedo)code:
departments.select(dep => new {
dep.Id,
Employee = new {
dep.Employee.Id, dep.Employee.Name
}
});
share
|
i...
memcpy() vs memmove()
...or you risk undefined behaviour, while the memory in memmove can overlap.
char a[16];
char b[16];
memcpy(a,b,16); // valid
memmove(a,b,16); // Also valid, but slower than memcpy.
memcpy(&a[0], &a[1],10); // Not valid since it overlaps.
memmove(&a[0], &a[1],10); ...