大约有 23,300 项符合查询结果（耗时：0.0427秒） [XML]
Validate that a string is a positive integer
... a JavaScript integer to be a value of maximum 4294967295 (i.e. Math.pow(2,32)-1), then the following short solution will perfectly work:
function isPositiveInteger(n) {
return n >>> 0 === parseFloat(n);
}
DESCRIPTION:
Zero-fill right shift operator does three important things:
t...
How to get the source directory of a Bash script from within the script itself?
...a testcase
– tvlooy
Jun 9 '15 at 19:32
171
...
AES Encryption for an NSString on the iPhone
...VkX1+MEhsbofUNj58m+8tu9ifAKRiY/Zf8YIw= and I have the key: 3841b8485cd155d932a2d601b8cee2ec . I can't decrypt the string using the key with your solution. Thanks
– George
Jun 11 '14 at 16:13
...
What is the reason for performing a double fork when creating a daemon?
...produce the above quoted results: gist.github.com/cannium/7aa58f13c834920bb32c
– can.
Jul 6 '15 at 2:02
...
Select by partial string from a pandas DataFrame
...modified example.
df4 = pd.DataFrame({'col': ['foo abc', 'foobar xyz', 'bar32', 'baz 45']})
df4
col
0 foo abc
1 foobar xyz
2 bar32
3 baz 45
df4[df4['col'].str.contains(r'foo|baz')]
col
0 foo abc
1 foobar xyz
3 baz 45
You can also create a list of ter...
In C#, how do I calculate someone's age based on a DateTime type birthday?
...the form of an extension method. Error checking omitted:
public static Int32 GetAge(this DateTime dateOfBirth)
{
var today = DateTime.Today;
var a = (today.Year * 100 + today.Month) * 100 + today.Day;
var b = (dateOfBirth.Year * 100 + dateOfBirth.Month) * 100 + dateOfBirth.Day;
re...
Syntax behind sorted(key=lambda: …)
...
– Christopher Markieta
Jan 23 '12 at 2:32
19
...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...rios :-)
– ashirley
May 9 '16 at 13:32
93
This is a fabulous answer. I think Docker documentation...
How to optimize for-comprehensions and loops in Scala?
...ancies between run times of 2.5s and 0.7s were entirely due to whether the 32-bit or 64-bit JVMs were being used. Scala from the command line uses whatever is set by JAVA_HOME, while Java uses 64-bit if available regardless. IDEs have their own settings. Some measurements here: Scala execution times...
How to Update Multiple Array Elements in mongodb
...
What is elem?
– user1063287
Sep 10 '18 at 8:01
1
This is correct. N...