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How to skip over an element in .map()?
...solution:
/**
* Filter-map. Like map, but skips undefined values.
*
* @param callback
*/
function fmap(callback) {
return this.reduce((accum, ...args) => {
let x = callback(...args);
if(x !== undefined) {
accum.push(x);
}
return accum;
}, [...
Validate uniqueness of multiple columns
...
Just wanted to add that you can pass multiple scope params in case you need to validate uniqueness on more than 2 fields. I.e. :scope => [:friend_id, :group_id]
– Dave Rapin
May 2 '11 at 16:36
...
Download and open PDF file using Ajax
... var url = contextPath + "/xyz/blahBlah.action"; url += url + "?" + params; try { var child = window.open(url); child.focus(); } catch (e) { }
– Nayn
Jan 4 '10 at 16:37
...
Tree data structure in C#
...d Action<T>( T obj ) . There are also versions from 0 to 4 different parameters. There's also an analogous delegate for functions called Func<>.
– Benny Jobigan
Feb 6 '10 at 23:45
...
Difference between open and codecs.open in Python
...
This makes sense to me. io.open does not take an encoding param from what I can see in python 2.7.5
– radtek
Jan 23 '18 at 15:52
1
...
Mipmap drawables for icons
...gnored by the
* renderer. It is not guaranteed to have any effect.
*
* @param hasMipMap indicates whether the renderer should attempt
* to use mipmaps
*
* @see #hasMipMap()
*/
public final void setHasMipMap(boolean hasMipMap) {
nativeSetHasMipMap(mNativeBitmap, hasMipMap)...
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...ysqli->error); // or $mysqli->error_list
}
else if ( !$stmt->bind_param('s', $_POST['username']) ) {
yourErrorHandler($stmt->error); // or $stmt->error_list
}
else if ( !$stmt->execute() ) {
yourErrorHandler($stmt->error); // or $stmt->error_list
}
else {
$result ...
Rails detect if request was AJAX
..._request, only: [:action, :action_2]
def action
@model = Model.find(params[:id])
end
def action_2
# load resource(s)
end
private
def require_xhr_request
redirect_to(root_url) unless request.xhr?
end
end
...
MVC3 DropDownListFor - a simple example?
...ad to use an IEnumerable<Contrib> to satisfy the DropDownListFor parameter requirements. Now, however, how is MVC FW supposed to map the value that is selected on this drop-down back into the simple string property on my view model?
...
Convert form data to JavaScript object with jQuery
...ve element root from the generated keys. To achieve that, I've added a new param keyMap and the following line: key = if keyMap? then keyMap(@name) else @name. Now you can pass mapping function like (name) -> name.match(/\[([^\]]+)]/)[1]. And then one would need to change all subsequent @name to ...