大约有 40,000 项符合查询结果（耗时：0.0374秒） [XML]
Reading CSV file and storing values into an array
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You can do it like this:
using System.IO;
static void Main(string[] args)
{
using(var reader = new StreamReader(@"C:\test.csv"))
{
List<string> listA = new List<string>();
List<string> listB = new List<string>();
while (!reader....
SQL order string as number
...o number
select col from yourtable
order by col + 0
BTW MySQL converts strings from left to right. Examples:
string value | integer value after conversion
--------------+--------------------------------
'1' | 1
'ABC' | 0 /* the string does not contain a number, so the re...
onKeyPress Vs. onKeyUp and onKeyDown
... an empty input element:
The value of the input element will be an empty string (old value) inside the keypress handler
The value of the input element will be 1 (new value) inside the keyup handler.
This is of critical importance if you are doing something that relies on knowing the new value af...
ActiveRecord: size vs count
...many association, size will use the cached count directly, and not make an extra query at all.
class Image < ActiveRecord::Base
belongs_to :product, counter_cache: true
end
class Product < ActiveRecord::Base
has_many :images
end
> product = Product.first # query, load product into m...
How to parse a query string into a NameValueCollection in .NET
I would like to parse a string such as p1=6&p2=7&p3=8 into a NameValueCollection .
19 Answers
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Splitting on first occurrence
What would be the best way to split a string on the first occurrence of a delimiter?
5 Answers
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Algorithm to return all combinations of k elements from n
... java.util.Arrays;
public class Combination {
public static void main(String[] args){
String[] arr = {"A","B","C","D","E","F"};
combinations2(arr, 3, 0, new String[3]);
}
static void combinations2(String[] arr, int len, int startPosition, String[] result){
if (l...
How to append data to div using JavaScript?
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Try this:
var div = document.getElementById('divID');
div.innerHTML += 'Extra stuff';
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Maximum MIMEType Length when storing type in DB
...s", type (eg. "application") and subtype (eg "vnd...") both can be max 127 characters. You do the math :)
Edit: Meanwhile, that document has been obsoleted by RFC 6838, which does not alter the maximum size but adds a remark:
Also note that while this syntax allows names of up to 127
characte...
Android image caching
...ge collected during crisis). This could ensue a Reload though.
HashMap<String,SoftReference<Bitmap>> imageCache =
new HashMap<String,SoftReference<Bitmap>>();
writing them on SDcard will not require a Reload; just a user-permission.
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