大约有 35,422 项符合查询结果（耗时：0.0642秒） [XML]
What's the point of having pointers in Go?
...xample taken from http://www.golang-book.com/8
func zero(x int) {
x = 0
}
func main() {
x := 5
zero(x)
fmt.Println(x) // x is still 5
}
as contrasted with
func zero(xPtr *int) {
*xPtr = 0
}
func main() {
x := 5
zero(&x)
fmt.Println(x) // x is 0
}
...
Add Bootstrap Glyphicon to Input Box
... style icon */
.inner-addon .glyphicon {
position: absolute;
padding: 10px;
pointer-events: none;
}
/* align icon */
.left-addon .glyphicon { left: 0px;}
.right-addon .glyphicon { right: 0px;}
/* add padding */
.left-addon input { padding-left: 30px; }
.right-addon input { padding-right...
Creating and throwing new exception
...
answered Jul 4 '14 at 23:05
WiiBoppWiiBopp
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...
What is the PostgreSQL equivalent for ISNULL()
...
460
SELECT CASE WHEN field IS NULL THEN 'Empty' ELSE field END AS field_alias
Or more idiomatic:
...
Get time difference between two dates in seconds
... = new Date();
var seconds = (endDate.getTime() - startDate.getTime()) / 1000;
Or even simpler (endDate - startDate) / 1000 as pointed out in the comments unless you're using typescript.
The explanation
You need to call the getTime() method for the Date objects, and then simply subtract them and ...
Can I return the 'id' field after a LINQ insert?
... |
edited Jul 6 '15 at 6:06
T.J. Crowder
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...
Magic number in boost::hash_combine
...umber is supposed to be 32 random bits, where each is equally likely to be 0 or 1, and with no simple correlation between the bits. A common way to find a string of such bits is to use the binary expansion of an irrational number; in this case, that number is the reciprocal of the golden ratio:
phi...
Copying files from Docker container to host
.../openface "/bin/bash" 33 minutes ago Up 33 minutes 0.0.0.0:8000->8000/tcp, 0.0.0.0:9000->9000/tcp goofy_roentgen
You can also use (part of) the Container ID. The following command is equivalent to the first
$ sudo docker cp 1b4a:/out_read.jpg .
...
duplicate MIME type “text/html”?
... -inactive-duskwuff -inactive-
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7
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Why is rbindlist “better” than rbind?
...es where one has factor and other has character type for a column (Bug #2650)
It has problems with duplicate column names
see
Warning message: in rbindlist(allargs) : NAs introduced by coercion: possible bug in data.table? (Bug #2384)
rbind.data.frame rownames can be frustrating
rbindlist ca...