大约有 48,000 项符合查询结果（耗时：0.0514秒） [XML]
Enable zooming/pinch on UIWebView
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232
Make sure you checked "Scales page to fit"
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Replace specific characters within strings
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With a regular expression and the function gsub():
group <- c("12357e", "12575e", "197e18", "e18947")
group
[1] "12357e" "12575e" "197e18" "e18947"
gsub("e", "", group)
[1] "12357" "12575" "19718" "18947"
What gsub does here is to replace each occurrence of "e" with an empty string ""....
Android - shadow on text?
...tColor">#ffffffff</item>
<item name="android:textSize">12sp</item>
<item name="android:shadowColor">#000000</item>
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">1</item>
<item name="android:shadowR...
Multiple glibc libraries on a single host
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234
It is very possible to have multiple versions of glibc on the same system (we do that every da...
What is the maximum characters for the NVARCHAR(MAX)?
I have declared a column of type NVARCHAR(MAX) in SQL Server 2008, what would be its exact maximum characters having the MAX as the length?
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Dynamically select data frame columns using $ and a character value
...s a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. Se...
passing several arguments to FUN of lapply (and others *apply)
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122
If you look up the help page, one of the arguments to lapply is the mysterious .... When we loo...
ActiveRecord, has_many :through, and Polymorphic Associations
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162
There is a known issue with Rails 3.1.1 that breaks this functionality. If you are having this p...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
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205
Put this in your Rakefile above require 'rake':
require 'rake/dsl_definition'
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Find and replace string values in list
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282
words = [w.replace('[br]', '<br />') for w in words]
These are called List Comprehensi...