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How to remove all whitespace from a string?
...ical tab, form feed
x <- c(
" x y ", # spaces before, after and in between
" \u2190 \u2192 ", # contains unicode chars
paste0( # varied whitespace
whitespace,
"x",
whitespace,
"y",
whitespace,
collapse = ""
),
NA ...
TortoiseSVN icons not showing up under Windows 7
I can't seem to get the icons to display under Windows 7 and I really miss this from Windows XP.
31 Answers
...
SQL Joins Vs SQL Subqueries (Performance)?
...PECT the first query to be quicker, mainly because you have an equivalence and an explicit JOIN. In my experience IN is a very slow operator, since SQL normally evaluates it as a series of WHERE clauses separated by "OR" (WHERE x=Y OR x=Z OR...).
As with ALL THINGS SQL though, your mileage may va...
HttpWebRequest using Basic authentication
...add the authorization header yourself.
Just make the name "Authorization" and the value "Basic BASE64({USERNAME:PASSWORD})"
String username = "abc";
String password = "123";
String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + pass...
jQuery Click fires twice when clicking on label
I am using jQuery to create custom radio buttons and i have a problem.
When clicking on the label that associated with the radio the click events fires twice, if i click only on the radio itself it's working fine (well actually it's not the radio i am clicking but the div that wraps the whole input ...
What does “exited with code 9009” mean during this build?
...
Did you try to give the full path of the command that is running in the pre- or post-build event command?
I was getting the 9009 error due to a xcopy post-build event command in Visual Studio 2008.
The command "xcopy.exe /Y C:\projectpath\project.config C:\compile...
Extracting specific columns from a data frame
I have an R data frame with 6 columns, and I want to create a new dataframe that only has three of the columns.
10 Answers
...
How to install the current version of Go in Ubuntu Precise
...e GVM for managing my Go versions in my Ubuntu box. Pretty simple to use, and if you're familiar with RVM, it's a nobrainer. It allows you to have multiple versions of Go installed in your system and switch between whichever version you want at any point in time.
Install GVM with:
sudo apt-get i...
Difference between binary tree and binary search tree
Can anyone please explain the difference between binary tree and binary search tree with an example ?
12 Answers
...
Getting the parent of a directory in Bash
...
and the variant I'm using to get the parent of current working directory: parentdir=$(dirname `pwd`)
– TheGrimmScientist
Jul 11 '15 at 21:31
...