大约有 30,000 项符合查询结果（耗时：0.0448秒） [XML]
Find duplicate lines in a file and count how many time each line was duplicated?
Suppose I have a file similar to the following:
7 Answers
7
...
How do I convert a datetime to date?
How do I convert a datetime.datetime object (e.g., the return value of datetime.datetime.now()) to a datetime.date object in Python?
...
YYYY-MM-DD format date in shell script
... $date
# -1 -> explicit current date, bash >=4.3 defaults to current time if not provided
# -2 -> start time for shell
printf -v date '%(%Y-%m-%d)T\n' -1
# put current date as yyyy-mm-dd HH:MM:SS in $date
printf -v date '%(%Y-%m-%d %H:%M:%S)T\n' -1
# to print directly remove -v flag, as...
Why should I use a pointer rather than the object itself?
...t a copy of it. If you're okay with copying/moving the object (most of the time you should be), you should prefer an automatic object.
You need to allocate a lot of memory, which may easily fill up the stack. It would be nice if we didn't have to concern ourselves with this (most of the time you sho...
Find Java classes implementing an interface [duplicate]
Some time ago, I came across a piece of code, that used some piece of standard Java functionality to locate the classes that implemented a given interface. I know the functions were hidden in some non-logical place, but they could be used for other classes as the package name implied. Back then I di...
How can I compare two dates in PHP?
...ay = date("Y-m-d");
$expire = $row->expireDate; //from database
$today_time = strtotime($today);
$expire_time = strtotime($expire);
if ($expire_time < $today_time) { /* do Something */ }
If you are using PHP 5 >= 5.2.0, you could use the DateTime class:
$today_dt = new DateTime($today)...
Number of days in particular month of particular year?
...d later
@Warren M. Nocos.
If you are trying to use Java 8's new Date and Time API, you can use java.time.YearMonth class. See Oracle Tutorial.
// Get the number of days in that month
YearMonth yearMonthObject = YearMonth.of(1999, 2);
int daysInMonth = yearMonthObject.lengthOfMonth(); //28
Tes...
How can I use xargs to copy files that have spaces and quotes in their names?
... People use xargs because typically it's faster to call an executable 5 times with 200 arguments each time than to call it 1000 times with one argument every time.
– tzot
Oct 14 '08 at 1:23
...
When to use generic methods and when to use wild-card?
... c.add(o); // correct
}
}
But the following will result in compile time error.
static <T> void fromArrayToCollection(T[] a, Collection<?> c) {
for (T o : a) {
c.add(o); // compile time error
}
}
An example of how to use getopts in bash
...urce ./getopt.sh
USAGE="-u USER -d DATABASE -p PASS -s SID [ -a START_DATE_TIME ]"
parse_options "${USAGE}" ${@}
echo ${USER}
echo ${START_DATE_TIME}
Old answer:
I recently needed to use a generic approach. I came across with this solution:
#!/bin/bash
# Option Description:
# ------------------...