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what is “strict mode” and how is it used?
...e code.
// app.js whole script in strict mode syntax
“use strict”;
// Now you can start writing your code
Strict mode for function:
To Invoke strict mode for a function, put the exact statement “use strict”; in the start of function body before any other statement.
function yourFunc()...
How to un-commit last un-pushed git commit without losing the changes
...t those changes are still visible in the history)
git push origin master
now if you want to have those changes as you local changes in your working copy ("so that your local copy keeps the changes made in that commit") - just revert the revert commit with --no-commit option:
git revert --no-commi...
Is there a way to chain multiple value converters in XAML?
...n't getting the credit you deserved (I'd accepted my own answer!), so I've now marked your answer as accepted. Only about 9 years late... :facepalm:
– Mal Ross
Aug 27 '19 at 13:54
...
What is the purpose of the “role” attribute in HTML?
...pdate 7 years later (2020): As at least one commenter pointed out, this is now very useful for custom elements, and some spec work is underway to define the default accessibility role of a web component. Even if/once that API is standardized, there may be need to override the default role of a compo...
How to write header row with csv.DictWriter?
...f writing the header row.
Simple example of using the writeheader() method now available in 2.7 / 3.2:
from collections import OrderedDict
ordered_fieldnames = OrderedDict([('field1',None),('field2',None)])
with open(outfile,'wb') as fou:
dw = csv.DictWriter(fou, delimiter='\t', fieldnames=orde...
What is the best way to detect a mobile device?
...ackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase()));
Now $.browser will return "device" for all above devices
Note: $.browser removed on jQuery v1.9.1. But you can use this by using jQuery migration plugin Code
A more thorough version:
var isMobile = false; //initiate as f...
Python decorators in classes
...
Thanks Michael, only now saw that this is what I wanted.
– hcvst
Jan 18 '11 at 16:05
2
...
How to Create a circular progressbar in Android which rotates on it?
.../shape>
</rotate>
</item>
</layer-list>
Now in your activity_main.xml add following:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
...
Selecting pandas column by location
...: The original answer suggested the use of df.ix[:,2] but this function is now deprecated. Users should switch to df.iloc[:,2].
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How to avoid overflow in expr. A * B - C * D
...c * d
x / (a * d) = (a * b - c * d) / (a * d)
x / (a * d) = b / d - c / a
now, the integer/mod stuff:
x / (a * d) = (b / d + ( b % d ) / d) - (c / a + ( c % a ) / a )
x / (a * d) = (b / d - c / a) - ( ( c % a ) / a - ( b % d ) / d)
x = (b / d - c / a) * a * d - ( ( c % a ) * d - ( b % d ) * a)
...