大约有 22,000 项符合查询结果（耗时：0.0170秒） [XML]
How to capitalize the first letter in a String in Ruby
The upcase method capitalizes the entire string, but I need to capitalize only the first letter.
8 Answers
...
How can I use “sizeof” in a preprocessor macro?
...ou can use following macro:
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
Usage:
BUILD_BUG_ON( sizeof(someThing) != PAGE_SIZE );
This article explains in details why it works.
3. MS-specific
On Microsoft C++ compiler you can use C_ASSERT macro (requires #include &...
What is the maximum characters for the NVARCHAR(MAX)?
...
From MSDN Documentation
nvarchar [ ( n | max ) ]
Variable-length Unicode string data. n defines the string length and can be a value from 1 through 4,000. max indicates that the maximum storage size is 2^31-1 bytes (2 GB).
The storage size, in bytes, is two times the actual length of data entered ...
Is there any boolean type in Oracle databases?
...on about what to use instead. See this thread on asktom. From recommending CHAR(1) 'Y'/'N' they switch to NUMBER(1) 0/1 when someone points out that 'Y'/'N' depends on the English language, while e.g. German programmers might use 'J'/'N' instead.
The worst thing is that they defend this stupid deci...
How do I check if an integer is even or odd? [closed]
...lyzeEvenness(object o)
{
if (o == null)
return Evenness.Unknown;
string foo = o.ToString();
if (String.IsNullOrEmpty(foo))
return Evenness.Unknown;
char bar = foo[foo.Length - 1];
switch (bar)
{
case '0':
case '2':
case '4':
case '6':
case '8':
...
Bash continuation lines
...is creates two arguments to echo and you only want one, then let's look at string concatenation. In bash, placing two strings next to each other concatenate:
$ echo "continuation""lines"
continuationlines
So a continuation line without an indent is one way to break up a string:
$ echo "continua...
do { … } while (0) — what is it good for? [duplicate]
...t;}) instead of do {} while(0):
#include <stdio.h>
#define log_to_string1(str, fmt, arg...) \
do { \
sprintf(str, "%s: " fmt, "myprog", ##arg); \
} while (0)
#define log_to_string2(str, fmt, arg...) \
({ \
sprintf(str, "%s: " fmt, "myprog", ##arg); \
})
int...
How to check for valid email address? [duplicate]
... re.fullmatch which is preferable to re.match.
Note the r in front of the string; this way, you won't need to escape things twice.
If you have a large number of regexes to check, it might be faster to compile the regex first:
import re
EMAIL_REGEX = re.compile(r"... regex here ...")
if not EMAI...
How to prevent gcc optimizing some statements in C?
...ch function that is defined after this point is as if attribute((optimize("STRING"))) was specified for that function.".
– Ciro Santilli 郝海东冠状病六四事件法轮功
Jun 26 '19 at 15:21
...
Java: notify() vs. notifyAll() all over again
...llowing sequence of events occurs - deadlock results:
STEP 1:
- P1 puts 1 char into the buffer
STEP 2:
- P2 attempts put - checks wait loop - already a char - waits
STEP 3:
- P3 attempts put - checks wait loop - already a char - waits
STEP 4:
- C1 attempts to get 1 char
- C2 attempts to get 1 c...