大约有 42,000 项符合查询结果（耗时：0.0486秒） [XML]
How to delete from a text file, all lines that contain a specific string?
...
To remove the line and print the output to standard out:
sed '/pattern to match/d' ./infile
To directly modify the file – does not work with BSD sed:
sed -i '/pattern to match/d' ./infile
Same, but for BSD sed (Mac OS X and FreeBSD) –...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
...int main()
{
boost::filesystem::path path("/usr/local/include"); // random pathname
bool result = boost::filesystem::is_directory(path);
printf(“Path is a directory : %d\n”, result);
return 0;
}
此代码非常明了易懂，您并不需要了解任何系统特定的例程...
How to count items in a Go map?
...
Use len(m). From http://golang.org/ref/spec#Length_and_capacity
len(s) string type string length in bytes
[n]T, *[n]T array length (== n)
[]T slice length
map[K]T map length (number of defined keys)
c...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
...nly accept CONSTRAINTs to be added, not indexes. The fact that primary key and unique constraints are implemented in terms of an index is a side effect. To manage indexes, you have CREATE/ALTER/DROP INDEX, as you are well aware.
Why do you have a such a requirement as to add non-unique-non-clustere...
How to get the text node of an element?
I wish to get the "I am text node", do not wish to remove the "edit" tag, and need a cross browser solution.
10 Answers
...
How to print number with commas as thousands separators?
I am trying to print an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way.
...
How to print time in format: 2009‐08‐10 18:17:54.811
...
It's an even better answer now, and props for looking up how to handle the millisecond part. I think your buffer is now a little longer than it needs to be, though.
– Jack Kelly
Sep 9 '10 at 3:56
...
How to check if a column exists in a SQL Server table?
...(SELECT 1 FROM sys.columns
WHERE Name = N'columnName'
AND Object_ID = Object_ID(N'schemaName.tableName'))
BEGIN
-- Column Exists
END
Martin Smith's version is shorter:
IF COL_LENGTH('schemaName.tableName', 'columnName') IS NOT NULL
BEGIN
-- Column Exists
END
...
Using scanf() in C++ programs is faster than using cin?
... a quick test of a simple case: a program to read a list of numbers from standard input and XOR all of the numbers.
iostream version:
#include <iostream>
int main(int argc, char **argv) {
int parity = 0;
int x;
while (std::cin >> x)
parity ^= x;
std::cout << parity...
list.clear() vs list = new ArrayList(); [duplicate]
Which one of the 2 options is better and faster to clear an ArrayList, and why?
8 Answers
...