大约有 42,000 项符合查询结果（耗时：0.0684秒） [XML]
detach all packages while working in R
...nly names(sessionInfo()$loadedOnly) to explicitly attached packages first, and then detach the packages, as so.
lapply(names(sessionInfo()$loadedOnly), require, character.only = TRUE)
invisible(lapply(paste0('package:', names(sessionInfo()$otherPkgs)), detach, character.only=TRUE, unload=TRUE, force...
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.
...
Activity has leaked window that was originally added
What is this error, and why does it happen?
40 Answers
40
...
ActionBar text color
...ncoding="utf-8"?>
<resources>
<style name="MyTheme" parent="@android:style/Theme.Holo.Light">
<item name="android:actionBarStyle">@style/MyTheme.ActionBarStyle</item>
</style>
<style name="MyTheme.ActionBarStyle" parent="@android:style/Widget.Holo.Light...
Singleton with Arguments in Java
I was reading the Singleton article on Wikipedia and I came across this example:
20 Answers
...
How can I parse a YAML file from a Linux shell script?
...sible for a non-technical user to edit (unfortunately it has to be a file) and so I wanted to use YAML. I can't find any way of parsing this from a Unix shell script however.
...
Case statement with multiple values in each 'when' block
... This link has a better summary of case statements in Ruby (and it includes examples of the regexp and splat syntax too).
– rsenna
Feb 20 '13 at 18:59
...
Using DISTINCT and COUNT together in a MySQL Query
... Updated the answer as it is close to become a great answer and it was syntactically incorrect.
– Rahul Tripathi
Sep 8 '14 at 10:20
...
Remove stubborn underline from link
... blue underline is stubbornly persisting. I tried text-decoration: none; and text-decoration: none !important; in the CSS to remove the link underline. Neither worked.
...
How to execute a Ruby script in Terminal?
...set everything up that I need on my Mac (Ruby, Rails, Homebrew, Git, etc), and I've even written a small program. Now, how do I execute it in Terminal? I wrote the program in Redcar and saved it as a .rb, but I don't know how to execute it through Terminal. I want to run the program and see if it ac...