大约有 9,000 项符合查询结果（耗时：0.0134秒） [XML]
INSERT IF NOT EXISTS ELSE UPDATE?
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Have a look at http://sqlite.org/lang_conflict.html.
You want something like:
insert or replace into Book (ID, Name, TypeID, Level, Seen) values
((select ID from Book where Name = "SearchName"), "SearchName", ...);
Note that any field not in the insert l...
Why do python lists have pop() but not push()
...t.append in early 1991. By comparison, here's part of a discussion on comp.lang.python about adding pop in 1997. Guido wrote:
To implement a stack, one would need
to add a list.pop() primitive (and
no, I'm not against this particular
one on the basis of any principle).
list.push() cou...
Where is Java Installed on Mac OS X?
I just downloaded Java 7u17 on Mac OS 10.7.5 from here and then successfully installed it. In order to do some JNI programming, I need to know where Java installed on my Mac.
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Tool to read and display Java .class versions
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Use the javap tool that comes with the JDK. The -verbose option will print the version number of the class file.
> javap -verbose MyClass
Compiled from "MyClass.java"
public class MyClass
SourceFile: "MyClass.java"
minor vers...
How to install the JDK on Ubuntu Linux
I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it.
33 A...
Convert java.time.LocalDate into java.util.Date type
I want to convert java.time.LocalDate into java.util.Date type. Because I want to set the date into JDateChooser . Or is there any date chooser that supports java.time dates?
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'AND' vs '&&' as operator
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Actually, other languages (for example, Perl and Ruby) also have these variants with the same precedence distinction so it wouldn't be sensible to deviate from this standard (however puzzling it might be for beginners) by making precedence e...
Calendar returns wrong month [duplicate]
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This is not an Android issue but a Java issue.
– Grrrben
Dec 6 '15 at 15:00
1
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Gradle finds wrong JAVA_HOME even though it's correctly set
...inary I downloaded from the Ubuntu 13.10 repository itself tries to export JAVA_HOME. Thanks to Lucas for suggesting this.
/usr/bin/gradle line 70:
export JAVA_HOME=/usr/lib/jvm/default-java
Commenting this line out solves the problem, and Gradle finds the correct path to the Java binary.
If y...
How to install Java 8 on Mac
I want to do some programming with the latest JavaFX, which requires Java 8. I'm using IntelliJ 13 CE and Mac OS X 9 Mavericks. I ran Oracle's Java 8 installer, and the files look like they ended up at
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