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How to check if element has any children in Javascript?
...d way...
rv = false;
for (child = element.firstChild; !rv && child; child = child.nextSibling) {
if (child.nodeType == 1) { // 1 == Element
rv = true;
}
}
}
return rv;
}
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Semantic Diff Utilities [closed]
...bove approximation.
EDIT Jan 2010: Versions available for C++, C#, Java, PHP, and COBOL.
The website shows specific examples for most of these.
EDIT May 2010: Python and JavaScript added.
EDIT Oct 2010: EGL added.
EDIT Nov 2010: VB6, VBScript, VB.net added
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Guards vs. if-then-else vs. cases in Haskell
...
From a technical standpoint, all three versions are equivalent.
That being said, my rule of thumb for styles is that if you can read it as if it was English (read | as "when", | otherwise as "otherwise" and = as "is" or "be"), you're probably doing some...
How do I change the cursor between Normal and Insert modes in Vim?
... on macOS; Git Bash with ConEmu on Windows; and more (see comments):
let &t_SI = "\e[6 q"
let &t_EI = "\e[2 q"
" Optionally reset the cursor on start:
augroup myCmds
au!
autocmd VimEnter * silent !echo -ne "\e[2 q"
augroup END
Other options (replace the number after \e[):
Ps = 0 -> bl...
How do I POST urlencoded form data with $http without jQuery?
...st the data
with the content-type, "application/x-www-form-urlencoded".
Example from here.
$http({
method: 'POST',
url: url,
headers: {'Content-Type': 'application/x-www-form-urlencoded'},
transformRequest: function(obj) {
var str = [];
for(var p in obj)
str....
Programmer-friendly search engine? [closed]
...ires sign-up), through which you can use Yahoo's web search. If you escape all relevant characters as described in the FAQ, you can search for arbitrary verbatim strings.
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What is the right way to check for a null string in Objective-C?
...NSString that is actually there but is essentially an empty string. (For example as a literal object = @""; or object = nil;)
– KellyTheDude
Sep 14 '15 at 17:11
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Write lines of text to a file in R
...
I would use the cat() command as in this example:
> cat("Hello",file="outfile.txt",sep="\n")
> cat("World",file="outfile.txt",append=TRUE)
You can then view the results from with R with
> file.show("outfile.txt")
hello
world
...
How do I update a formula with Homebrew?
...brew site..
for upgrading individual formula:
brew install formula-name && brew cleanup formula-name
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How to determine when a Git branch was created?
... master`
If you’d rather see it in context using gitk, then use
gitk --all --select-commit=`git merge-base foo master`
(where foo is the name of the branch you are looking for.)
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impro...