大约有 40,000 项符合查询结果（耗时：0.0558秒） [XML]
Opposite of %in%: exclude rows with values specified in a vector
A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
...
Java - No enclosing instance of type Foo is accessible
...e your program work.
As it is, you've got Thing as an inner class, which (by definition) is associated with a particular instance of Hello (even if it never uses or refers to it), which means it's an error to say new Thing(); without having a particular Hello instance in scope.
If you declare it ...
How do I quickly rename a MySQL database (change schema name)?
...abase < olddbdump.sql
Or to reduce I/O use the following as suggested by @Pablo Marin-Garcia:
mysqladmin -u username -p create newdatabase
mysqldump -u username -v olddatabase -p | mysql -u username -p -D newdatabase
...
Use jQuery to change an HTML tag?
... $currentElem.contents().unwrap();
// return node; (Error spotted by Frank van Luijn)
return this; // Suggested by ColeLawrence
}
});
$.fn.extend({
replaceTag: function (newTagObj, keepProps) {
// "return" suggested by ColeLawrence
return this.each(function(...
SQLite - replace part of a string
...t WHERE, SqlLite will tell you that every row in your table was affected. By using the WHERE, you'll only get the dozen or so rows you expected instead of potentially thousands.
– Weston Wedding
May 8 '17 at 18:37
...
What's the difference between “mod” and “remainder”?
...r. For example:
-21 mod 4 is 3 because -21 + 4 x 6 is 3.
But -21 divided by 4 gives -5 with a remainder of -1.
For positive values, there is no difference.
share
|
improve this answer
|
...
Add a properties file to IntelliJ's classpath
... the Compiler settings. Check that "?*.properties" is in there. It's there by default, but that's the only other thing I can think of off the top of my head.
– ColinD
Sep 22 '10 at 4:02
...
XSD: What is the difference between xs:integer and xs:int?
...racters; if the schema is used to validate a document instance constructed by means of XSLT or XQuery, there is every possibility that an xs:int value could be represented in memory using the conventional representation for 32-bit integers.
– C. M. Sperberg-McQueen
...
Android:What is difference between setFlags and addFlags for intent
...dle the Intent.setflag mainly depends on type of component being executed by the Intent.It returns the same intent object for chaining multiple calls into a single statement.
intent.addFlags(int num);
This helps to add additional flags to a particular intent with the existing values.this also re...
#if Not Debug in c#?
...pilation symbol. Here's an MSDN article for a more in-depth explanation.
By default, when in Debug configuration, Visual Studio will check the Define DEBUG constant option under the project's Build properties. This goes for both C# and VB.NET. If you want to get crazy you can define new build conf...