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Inner join vs Where
...he same execution plan, look at these two tables:
CREATE TABLE table1 (
id INT,
name VARCHAR(20)
);
CREATE TABLE table2 (
id INT,
name VARCHAR(20)
);
The execution plan for the query using the inner join:
-- with inner join
EXPLAIN PLAN FOR
SELECT * FROM table1 t1
INNER JOIN table2 t2 ...
常用Git命令汇总 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...变）
git reset <file> #从暂存区恢复到工作区（不指定版本id，则默认为最后一次提交的版本id）
git reset . #从暂存区恢复到工作区
git reset $id # 恢复到指定的提交版本，该$id之后的版本提交都恢复到工作区
git reset --hard $id #恢复...
How can you check for a #hash in a URL using JavaScript?
...window's URL, you can't do this for an arbitrary URL (e.g. one stored in a string variable)
– Gareth
Nov 18 '08 at 11:39
64
...
How to make custom error pages work in ASP.NET MVC 4
...
Did you have to put anything in your Application_Error in your Global.asax for this Pablo ?
– Alicia
Jul 4 '13 at 10:51
...
Changing default encoding of Python?
...ow.
In python 2 which was not as strongly typed regarding the encoding of strings you could perform operations on differently encoded strings, and succeed. E.g. the following would return True.
u'Toshio' == 'Toshio'
That would hold for every (normal, unprefixed) string that was encoded in sys.ge...
Javascript Object push() function
...ects, so use the right data structure.
var data = [];
// ...
data[0] = { "ID": "1", "Status": "Valid" };
data[1] = { "ID": "2", "Status": "Invalid" };
// ...
var tempData = [];
for ( var index=0; index<data.length; index++ ) {
if ( data[index].Status == "Valid" ) {
tempData.push( dat...
Is 0 a decimal literal or an octal literal?
...
If anybody's curious, the statement that "A token is a string of one or more characters that is significant as a group." appears to be from this Wikipedia article.
– Keith Thompson
Oct 30 '14 at 20:25
...
Java Enum definition
...Name returns a Node so chaining won't work for the City:
class Node {
String name;
Node setName(String name) {
this.name = name;
return this;
}
}
class City extends Node {
int square;
City setSquare(int square) {
this.square = square;
return th...
Generating a unique machine id
I need to write a function that generates an id that is unique for a given machine running a Windows OS.
15 Answers
...
Why do assignment statements return a value?
...operty of the assignment operator is used is reading lines from a file...
string line;
while ((line = streamReader.ReadLine()) != null)
// ...
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