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Scraping html tables into R data frames using the XML package
...ALSE) )
tables <- readHTMLTable(theurl)
tables <- list.clean(tables, fun = is.null, recursive = FALSE)
n.rows <- unlist(lapply(tables, function(t) dim(t)[1]))
the picked table is the longest one on the page
tables[[which.max(n.rows)]]
...
Check if a value exists in pandas dataframe index
...ta, 'value')
True
>>> '1' in getattr(df_data, 'value')
False
So fun :D
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Android WebView, how to handle redirects in app instead of opening a browser
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webview.setWebViewClient(object : WebViewClient() {
override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
view.loadUrl(url)
return false
}
})
For more info click here
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How to initialize a list of strings (List) with many string values
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@Oded: msdn.microsoft.com/en-us/library/bb384062.aspx "Collection initializers"
– Lucero
Jun 29 '10 at 8:54
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Converting JSON data to Java object
...rror can not deserialize instance of java.util.HashSet out of START_OBJECT token
– Dipen Chawla
May 15 '19 at 8:24
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How do you create a yes/no boolean field in SQL server?
... value (at least in recent versions).
When accessing the database through ASP.NET it will expose the field as a boolean value.
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Node.js setting up environment specific configs to be used with everyauth
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Example: on my machine the .env file is this:
NODE_ENV=dev
TWITTER_AUTH_TOKEN=something-needed-for-api-calls
My local .env overrides any environment variables. But on the staging or production servers (maybe they're on heroku.com) the environment variables are pre-set to stage NODE_ENV=stage or...
What is the use case of noop [:] in bash?
...causes bash to give a syntax error:
line 4: syntax error near unexpected token `fi'
line 4: `fi'
Bash can't have empty blocks (WTF). So you add a no-op:
if [ "$foo" != "1" ]
then
#echo Success
:
fi
or you can use the no-op to comment out the lines:
if [ "$foo" != "1" ]
then
: e...
INSERT IF NOT EXISTS ELSE UPDATE?
... your select needs at least WHERE true to solve parser ambiguity about the token ON with the join syntax.
Be warned that INSERT OR REPLACE... will delete the record before inserting a new one if it has to replace, which could be bad if you have foreign key cascades or other delete triggers.
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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...