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Add new row to dataframe, at specific row-index, not appended?
...trix(seq(20),nrow=5,ncol=4))
r <- 3
newrow <- seq(4)
insertRow <- function(existingDF, newrow, r) {
existingDF[seq(r+1,nrow(existingDF)+1),] <- existingDF[seq(r,nrow(existingDF)),]
existingDF[r,] <- newrow
existingDF
}
> insertRow(existingDF, newrow, r)
V1 V2 V3 V4
1 1 6...
使用 XML 和 Web 服务 · App Inventor 2 中文网
...用 隐私策略和使用条款 技术支持 service@fun123.cn
How to get URI from an asset File?
...etting the file path from that cache file.
@Throws(IOException::class)
fun getFileFromAssets(context: Context, fileName: String): File = File(context.cacheDir, fileName)
.also {
if (!it.exists()) {
it.outputStream().use { cache ->
...
How do I escape ampersands in XML so they are rendered as entities in HTML?
...DATA tags:
<![CDATA[
This is some text with ampersands & other funny characters. >>
]]>
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Is there an easy way to strike through text in an app widget?
...
Here is an extension for all you Kotlin folks
fun TextView.showStrikeThrough(show: Boolean) {
paintFlags =
if (show) paintFlags or Paint.STRIKE_THRU_TEXT_FLAG
else paintFlags and Paint.STRIKE_THRU_TEXT_FLAG.inv()
}
Usage
textView.showStri...
How to install Java SDK on CentOS?
...w to install JDK via yum and then setting the path can be found here (have fun!) - Install OpenJDK and set $JAVA_HOME path
OpenJDK 6:
yum install java-1.6.0-openjdk-devel
OpenJDK 7:
yum install java-1.7.0-openjdk-devel
To list all available java openjdk-devel packages try:
yum list "java-*-o...
What's a good hex editor/viewer for the Mac? [closed]
...
Yea, and you can read the developer talking about fun implementing stuff on it here ridiculousfish.com/blog
– kch
May 6 '09 at 0:50
4
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How to add MVC5 to Visual Studio 2013?
...a if exist. After the setup windows may restart, and you are ready to have fun with your Web Developer Tools now.
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How can I fill out a Python string with spaces?
...templates with only a single {...} and nothing else. Just use the format() function and save yourself the parsing overhead: format('Hi', '<16').
– Martijn Pieters♦
Jan 7 '18 at 16:29
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How to find the extension of a file in C#?
...e then an HTML upload form. Multi-MB uploads without a progress bar are no fun.
– Thilo
Dec 11 '09 at 9:50
ok you sayi...