大约有 44,000 项符合查询结果（耗时：0.0688秒） [XML]
What's the scope of a variable initialized in an if statement?
...nction, class, or module in which they're assigned. Control blocks like if and while blocks don't count, so a variable assigned inside an if is still scoped to a function, class, or module.
(Implicit functions defined by a generator expression or list/set/dict comprehension do count, as do lambda e...
Rails 2.3-style plugins and deprecation warnings running task in Heroku
...eare gives you a nice walkthrough link (found in the page @yuri linked) to convert my simple rails 2.3 plugins to 3.2. I liked this solution because it didn't just silence the warnings, it actually fixes them.
– Jeremiah
Oct 8 '13 at 17:24
...
Drop unused factor levels in a subsetted data frame
...
As a side-effect the function converts the data frame to a list, so the mydf <- droplevels(mydf) solution suggested by Roman Luštrik and Tommy O'Dell below is preferable.
– Johan
May 9 '14 at 10:41
...
What is the Java equivalent for LINQ? [closed]
... JDK8 called The Power of the Arrow, also NetBeans 8 has great support for converting constructs to JDK8 which I've also blogged about Migrating to JDK 8 with NetBeans.
share
|
improve this answer
...
.htaccess redirect all pages to new domain
...
I've used for my Wordpress blog this as .htaccess. It converts http://www.blah.example/asad, http://blah.example/asad, http://www.blah.example2/asad etc, to http://blah.example/asad
Thanks to all other answers I figured this out.
<IfModule mod_rewrite.c>
RewriteEngine On
R...
Print a file's last modified date in Bash
...t the modification date as a timestamp
date -d @1503989421 +%Y%m%d%H%M%S # Convert the date (from timestamp)
share
|
improve this answer
|
follow
|
...
Using a dictionary to count the items in a list [duplicate]
I'm new to Python and I have a simple question, say I have a list of items:
8 Answers
...
How to reset AUTO_INCREMENT in MySQL?
...ue is less than the current maximum value in the
column, no error occurs and the current sequence value is not changed.
See How to Reset an MySQL AutoIncrement using a MAX value from another table? on how to dynamically get an acceptable value.
...
Deleting multiple elements from a list
...
sort() is not defined for tuple, you'd have to convert to list first. sort() returns None, so you couldn't use reverse() on it.
– SilentGhost
Jan 31 '09 at 1:38
...
What is the difference between bindParam and bindValue?
What is the difference between PDOStatement::bindParam() and PDOStatement::bindValue() ?
7 Answers
...