大约有 47,000 项符合查询结果（耗时：0.0593秒） [XML]
How to write a bash script that takes optional input arguments?
...e some examples of how this works:
$ ./somecommand.sh
foo
bar
1
Thu Mar 29 10:03:20 ADT 2018
$ ./somecommand.sh ez
ez
bar
1
Thu Mar 29 10:03:40 ADT 2018
$ ./somecommand.sh able was i
able
was
i
Thu Mar 29 10:03:54 ADT 2018
$ ./somecommand.sh "able was i"
able was i
bar
1
Thu Mar 29 10:04:01 ADT 2...
Sleep until a specific time/date
... the following:
current_epoch=$(date +%s)
target_epoch=$(date -d '01/01/2010 12:00' +%s)
sleep_seconds=$(( $target_epoch - $current_epoch ))
sleep $sleep_seconds
To add precision down to nanoseconds (effectively more around milliseconds) use e.g. this syntax:
current_epoch=$(date +%s.%N)
targe...
Python division
I was trying to normalize a set of numbers from -100 to 0 to a range of 10-100 and was having problems only to notice that even with no variables at all, this does not evaluate the way I would expect it to:
...
SQL: How to properly check if a record exists
...
answered Nov 23 '10 at 8:23
Martin SchapendonkMartin Schapendonk
10.5k33 gold badges1515 silver badges2424 bronze badges
...
How to generate random number with the specific length in python
...
To get a random 3-digit number:
from random import randint
randint(100, 999) # randint is inclusive at both ends
(assuming you really meant three digits, rather than "up to three digits".)
To use an arbitrary number of digits:
from random import randint
def random_with_N_digits(n):
...
iOS: Use a boolean in NSUserDefaults
...
answered Oct 1 '10 at 16:34
Henrik P. HesselHenrik P. Hessel
34.4k1717 gold badges7676 silver badges9999 bronze badges
...
Differences in boolean operators: & vs && and | vs ||
...
Those are the bitwise AND and bitwise OR operators.
int a = 6; // 110
int b = 4; // 100
// Bitwise AND
int c = a & b;
// 110
// & 100
// -----
// 100
// Bitwise OR
int d = a | b;
// 110
// | 100
// -----
// 110
System.out.println(c); // 4
System.out.println(d); // 6
...
Check if a value is within a range of numbers
... max) {
return ((x-min)*(x-max) <= 0);
}
console.log(inRange(5, 1, 10)); // true
console.log(inRange(-5, 1, 10)); // false
console.log(inRange(20, 1, 10)); // false
share
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improv...
Javascript : natural sort of alphanumerical strings
...ed in Chrome, Firefox, and IE11.
Here's an example. It returns 1, meaning 10 goes after 2:
'10'.localeCompare('2', undefined, {numeric: true, sensitivity: 'base'})
For performance when sorting large numbers of strings, the article says:
When comparing large numbers of strings, such as in so...
Abort makefile if variable not set
... echoed).
– OrangeDog
Jun 14 '16 at 10:10
Ah, you need to structure it exactlt as in the linked duplicate.
...