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Javascript swap array elements
... out by @Jan Although I still find myself utilizing the temporary variable approach as it's cross-language (e.g. C/C++) and the first approach that usually pops into my mind.
– Ultimater
Aug 15 '18 at 7:22
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npm ERR cb() never called
I have a Node.js app hosted on Heroku. Every time I do a git push heroku I get the following error:
39 Answers
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Cannot import XSSF in Apache POI
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I added below contents in app "build.gradle"
implementation 'org.apache.poi:poi:4.0.0'
implementation 'org.apache.poi:poi-ooxml:4.0.0'
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impr...
Number of processors/cores in command line
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The most simplest tool comes with glibc and is called getconf:
$ getconf _NPROCESSORS_ONLN
4
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UITableView - change section header color
...lor:[UIColor clearColor]];
return headerView;
}
Swift:
func tableView(_ tableView: UITableView!, viewForHeaderInSection section: Int) -> UIView!
{
let headerView = UIView(frame: CGRect(x: 0, y: 0, width: tableView.bounds.size.width, height: 30))
if (section == integerRepresentingYourSect...
Convert camelCaseText to Sentence Case Text
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Alternatively using lodash:
lodash.startCase(str);
Example:
_.startCase('helloThere');
// ➜ 'Hello There'
Lodash is a fine library to give shortcut to many everyday js tasks.There are many other similar string manipulation functions such as camelCase, kebabCase etc.
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Have a reloadData for a UITableView animate when changing
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Actually, it's very simple:
[_tableView reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade];
From the documentation:
Calling this method causes the table view to ask its data source for
new cells for the ...
How do I add options to a DropDownList using jQuery?
...M object.
var myOptions = {
val1 : 'text1',
val2 : 'text2'
};
var _select = $('<select>');
$.each(myOptions, function(val, text) {
_select.append(
$('<option></option>').val(val).html(text)
);
});
$('#mySelect').append(_select.html());
This way we...
Custom exception type
...){
Object.setPrototypeOf(CustomError, Error);
} else {
CustomError.__proto__ = Error;
}
Alternative: use Classtrophobic framework
Explanation:
Why extending the Error class using ES6 and Babel is a problem?
Because an instance of CustomError is not anymore recognized as such.
class Cus...
How to hide first section header in UITableView (grouped style)
...dgeInsetsMake(-1.0f, 0.0f, 0.0f, 0.0);
}
Swift:
override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return section == 0 ? 1.0 : 32
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.contentInset = UIEdgeInsets(top: -1, ...