大约有 30,000 项符合查询结果（耗时：0.0420秒） [XML]
Using LIMIT within GROUP BY to get N results per group?
... on the rate column instead of the year column.
The maximum length of the string returned by GROUP_CONCAT is limited, so this works well if you need to select a few records for every group.
share
|
...
Get all directories within directory nodejs
....10.0+
We can use the new withFileTypes option of readdirSync to skip the extra lstatSync call:
const { readdirSync } = require('fs')
const getDirectories = source =>
readdirSync(source, { withFileTypes: true })
.filter(dirent => dirent.isDirectory())
.map(dirent => dirent.name...
How to get Enum Value from index in Java?
...index to start from '1' simply change these two methods to:
public static String getCountry(int i) {
return list[(i - 1)];
}
public static int listGetLastIndex() {
return list.length;
}
Inside my Main I get the needed countries-object with
public static void main(String[] args) {
in...
Signed versus Unsigned Integers
...
He only asked about signed and unsigned. Don't know why people are adding extra stuff in this. Let me tell you the answer.
Unsigned: It consists of only non-negative values i.e 0 to 255.
Signed: It consist of both negative and positive values but in different formats like
0 to +127
-1 to -128
...
get an element's id
...
You need to check if is a string to avoid getting a child element
var getIdFromDomObj = function(domObj){
var id = domObj.id;
return typeof id === 'string' ? id : false;
};
...
python .replace() regex [duplicate]
...t using regular expression use the re.sub function:
sub(pattern, repl, string[, count, flags])
It will replace non-everlaping instances of pattern by the text passed as string. If you need to analyze the match to extract information about specific group captures, for instance, you can pass a f...
Easy idiomatic way to define Ordering for a simple case class
...ering for Tuples, as it is clear, concise, and correct:
case class A(tag: String, load: Int) extends Ordered[A] {
// Required as of Scala 2.11 for reasons unknown - the companion to Ordered
// should already be in implicit scope
import scala.math.Ordered.orderingToOrdered
def compare(that:...
Tools for JPEG optimization? [closed]
...ly everything, the only drawback is it uses more CPU to decode (not enough extra to matter).
– Ariel
Jul 29 '12 at 6:07
1
...
How to check if a number is between two values?
...
I prefer to put the variable on the inside to give an extra hint that the code is validating my variable is between a range values
if (500 < size && size < 600) { doStuff(); }
share
...
How to solve “Could not establish trust relationship for the SSL/TLS secure channel with authority”
...
A little extra explanation can be found here : blog.effectivemessaging.com/2015_09_01_archive.html
– granadaCoder
Oct 21 '16 at 13:18
...