大约有 473 项符合查询结果（耗时：0.0237秒） [XML]
Regular expression to match standard 10 digit phone number
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note: this doesn't match 1234567890 which may or may not be a problem. for me it was - so I just added ? after each [\s.-] to make it optional
– Simon_Weaver
Aug 12 '14 at 20:59
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Formatting a float to 2 decimal places
...crolling through tons of docs every time I need to format some scalar.
$"{1234.5678:0.00}" "1234.57" 2 decimal places, notice that value is rounded
$"{1234.5678,10:0.00}" " 1234.57" right-aligned
$"{1234.5678,-10:0.00}" "1234.57 " left-aligned
$"{1234.5678:0.#####}"...
What is the string length of a GUID?
...id:
Guid.NewGuid().ToString() => 36 characters (Hyphenated)
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("D") => 36 characters (Hyphenated, same as ToString())
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("N") => 32 characters (Digits onl...
How to extract the substring between two markers?
Let's say I have a string 'gfgfdAAA1234ZZZuijjk' and I want to extract just the '1234' part.
18 Answers
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TSQL - Cast string to integer or return default value
...ARE @Test TABLE(Value nvarchar(50)) -- Result
INSERT INTO @Test SELECT '1234' -- 1234
INSERT INTO @Test SELECT '1,234' -- 1234
INSERT INTO @Test SELECT '1234.0' -- 1234
INSERT INTO @Test SELECT '-1234' -- -1234
INSERT INTO @Test SELECT '$1234' -- ...
What is the difference between String.slice and String.substring?
... This is incorrect, substr does handle negative parameters. '0123456789'.substr(-3, 2) -> '78'
– Neil Fraser
May 25 '17 at 15:22
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How can I pass a list as a command-line argument with argparse?
...'<Required> Set flag', required=True)
# Use like:
# python arg.py -l 1234 2345 3456 4567
nargs='+' takes 1 or more arguments, nargs='*' takes zero or more.
append
parser.add_argument('-l','--list', action='append', help='<Required> Set flag', required=True)
# Use like:
# python arg.p...
.NET String.Format() to add commas in thousands place for a number
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String.Format("{0:n}", 1234); // Output: 1,234.00
String.Format("{0:n0}", 9876); // No digits after the decimal point. Output: 9,876
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imp...
How to output numbers with leading zeros in JavaScript [duplicate]
...); // "0005"
console.log(zeroPad(5, 6)); // "000005"
console.log(zeroPad(1234, 2)); // "1234"
Another ES5 approach:
function zeroPad(num, places) {
var zero = places - num.toString().length + 1;
return Array(+(zero > 0 && zero)).join("0") + num;
}
zeroPad(5, 2); // "05"
zer...
What happens to an open file handle on Linux if the pointed file gets moved or deleted
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if (close(fd) != 0) {
perror_and_exit();
}
return 0;
}
data:
1234
1234
1234
1234
1234
Use gcc code.c to produce a.out. Run ./a.out. When you see the following output:
line: 1234
Use rm data to delete data. But ./a.out will continue to run without errors and produce the following w...