大约有 8,200 项符合查询结果（耗时：0.0379秒） [XML]
How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]
...lution:
[...new Set(a)];
Alternative:
Array.from(new Set(a));
Old response. O(n^2) (do not use it with large arrays!)
var arrayUnique = function(a) {
return a.reduce(function(p, c) {
if (p.indexOf(c) < 0) p.push(c);
return p;
}, []);
};
...
Get the previous month's first and last day dates in c#
I can't think of an easy one or two liner that would get the previous months first day and last day.
10 Answers
...
Mapping composite keys using EF code first
...
You definitely need to put in the column order, otherwise how is SQL Server supposed to know which one goes first? Here's what you would need to do in your code:
public class MyTable
{
[Key, Column(Order = 0)]
public string SomeId { get; set; ...
How to check which version of v8 is installed with my NodeJS?
...
Easy way:
Type in command line: node -p process.versions.v8
Hard worker way:
Type node --version to get the Node.js version.
Go to the Node.js Changelogs.
Find and open appropriate Node.js version change log.
Look for notes containing...
PostgreSQL: How to change PostgreSQL user password?
How do I change the password for PostgreSQL user?
17 Answers
17
...
Do I cast the result of malloc?
... result, since:
It is unnecessary, as void * is automatically and safely promoted to any other pointer type in this case.
It adds clutter to the code, casts are not very easy to read (especially if the pointer type is long).
It makes you repeat yourself, which is generally bad.
It can hide an erro...
Regular Expression: Any character that is NOT a letter or number
I'm trying to figure out the regular expression that will match any character that is not a letter or a number. So characters such as (,,@,£,() etc ...
...
Hexadecimal To Decimal in Shell Script
Can someone help me to convert a hexadecimal number to decimal number in a shell script?
6 Answers
...
Pandoc markdown page break
Recently I started using Pandoc markdown which seems a good alternative to LaTeX, as my document does not have many mathematical formulas, and I do not have ANY experience with LaTeX, which combined with less than 2 week submission deadline makes it a good solution.
...
Makefiles with source files in different directories
I have a project where the directory structure is like this:
10 Answers
10
...