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Compile time string hashing
...7b82d07L,
...
};
template<size_t idx>
constexpr uint32_t crc32(const char * str)
{
return (crc32<idx-1>(str) >> 8) ^ crc_table[(crc32<idx-1>(str) ^ str[idx]) & 0x000000FF];
}
// This is the stop-recursion function
template<>
constexpr uint32_t crc32<size_t(-...
What is the PostgreSQL equivalent for ISNULL()
...
SELECT CASE WHEN field IS NULL THEN 'Empty' ELSE field END AS field_alias
Or more idiomatic:
SELECT coalesce(field, 'Empty') AS field_alias
share...
Lazy Method for Reading Big File in Python?
... assert len(list(rows(f, chunksize=chunksize))) == 1
@cleanup
def test_1_char_2_rows(chunksize=1024):
with open(test_file, 'w') as f:
f.write('|')
with open(test_file) as f:
assert len(list(rows(f, chunksize=chunksize))) == 2
@cleanup
def test_1_char(chunksize=1024):
w...
Why are C character literals ints instead of chars?
...;
void print(char);
print('a');
You would expect that the call to print selects the second version taking a char. Having a character literal being an int would make that impossible. Note that in C++ literals having more than one character still have type int, although their value is implementatio...
Iterate over the lines of a string
...): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == '\n':
yield retval
retval = ''
if retval:
yield retval
def f3(foo=foo):
prevnl = -1
while True:
...
Creating your own header file in C
...ered Aug 18 '11 at 15:31
Oliver CharlesworthOliver Charlesworth
246k2626 gold badges510510 silver badges632632 bronze badges
...
Removing a list of characters in string
I want to remove characters in a string in python:
18 Answers
18
...
How do I concatenate const/literal strings in C?
...hing
const char *qry = // include comments in a string
" SELECT * " // get all fields
" FROM " SCHEMA "." TABLE /* the table */
" WHERE x = 1 " /* the filter */
;
...
clearing a char array c
...
FYI - indent code by 4 spaces or select it and hit the 'code' button, which looks like two lines of binary.
– user229044♦
Dec 10 '10 at 20:46
...
What new capabilities do user-defined literals add to C++?
...ctor call:
#include <bitset>
#include <iostream>
template<char... Bits>
struct checkbits
{
static const bool valid = false;
};
template<char High, char... Bits>
struct checkbits<High, Bits...>
{
static const bool valid = (High == '0' || High == '1')...