大约有 47,000 项符合查询结果(耗时:0.0652秒) [XML]
MySQL: Set user variable from result of query
...
Yes, but you need to move the variable assignm>me m>nt into the query:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (...
What is the difference between jQuery's mouseout() and mouseleave()?
...sed in this example, then when the mouse pointer moved out of the Inner elem>me m>nt, the handler would be triggered. This is usually undesirable behavior. The mouseleave event, on the other hand, only triggers its handler when the mouse leaves the elem>me m>nt it is bound to, not a descendant. So in this exa...
Django database query: How to get object by id?
...a primary key. If the author did specify a primary key field that isn't nam>me m>d id, then there will not be an id field.
– Craig Trader
Nov 29 '10 at 4:18
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Path to Powershell.exe (v 2.0)
...ble at the command prompt. If you are running v2.0, the output will be:
Nam>me m> Value
---- -----
CLRVersion 2.0.50727.4927
BuildVersion 6.1.7600.16385
PSVersion 2.0
WSManStackVersion ...
How do I change the Javadocs template generated in Eclipse?
I dislike the default Javadocs generated for m>me m> when I create a Class or m>me m>thods, especially the @author variable, which is the current system usernam>me m> on my windows box.
...
How do I check that a number is float or integer?
...ction isInt(n) {
return n % 1 === 0;
}
If you don't know that the argum>me m>nt is a number you need two tests:
function isInt(n){
return Number(n) === n && n % 1 === 0;
}
function isFloat(n){
return Number(n) === n && n % 1 !== 0;
}
Update 2019
5 years after this answer ...
Java unchecked: unchecked generic array creation for varargs param>me m>ter
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As janoh.janoh m>me m>ntioned above, varargs in Java is just a syntactic sugar for arrays plus the implicit creation of an array at the calling site. So
List<List<String>> combinations =
Utils.createCombinations(cocNumbers, vatN...
Selecting an elem>me m>nt in iFram>me m> jQuery
...r application, we parse a web page and load it into another page in an iFram>me m>. All the elem>me m>nts in that loaded page have their tokenid-s. I need to select the elem>me m>nts by those tokenid-s. m>Me m>ans - I click on an elem>me m>nt on the main page and select corresponding elem>me m>nt in the page in the iFram>me m>. With ...
Gets byte array from a ByteBuffer in java
Is this the recomm>me m>nded way to get the bytes from the ByteBuffer
6 Answers
6
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Force R to stop plotting abbreviated axis labels - e.g. 1e+00 in ggplot2
...
I think you are looking for this:
require(ggplot2)
df <- data.fram>me m>(x=seq(1, 1e9, length.out=100), y=sample(100))
# displays x-axis in scientific notation
p <- ggplot(data = df, aes(x=x, y=y)) + geom_line() + geom_point()
p
# displays as you require
require(scales)
p + scale_x_continu...
