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How to check if hex color is “too black”?
...= 0.2126 * r + 0.7152 * g + 0.0722 * b; // per ITU-R BT.709
if (luma < 40) {
// pick a different colour
}
EDIT
Since May 2014 tinycolor now has a getBrightness() function, albeit using the CCIR601 weighting factors instead of the ITU-R ones above.
EDIT
The resulting luma value range is ...
Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
...
Seems you forgot the '' of your string.
In [43]: df['Value'] = df.apply(lambda row: my_test(row['a'], row['c']), axis=1)
In [44]: df
Out[44]:
a b c Value
0 -1.674308 foo 0.343801 0.044698
1 -2.163236 bar -2.04...
How do you completely remove the button border in wpf?
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edited Jun 2 '10 at 11:47
answered Jun 2 '10 at 11:38
Si...
Calling a parent window function from an iframe
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444
<a onclick="parent.abc();" href="#" >Call Me </a>
See window.parent
Returns a r...
What is the JavaScript >>> operator and how do you use it?
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edited Apr 15 '10 at 18:45
Justin Johnson
28.9k77 gold badges5858 silver badges8585 bronze badges
answ...
how to get the last character of a string?
...
1041
An elegant and short alternative, is the String.prototype.slice method.
Just by:
str.slice(-1...
How do you clear a stringstream variable?
... is what happens when you forget the "clear()" part. stackoverflow.com/q/2848087/635549
– galath
Jun 17 '12 at 19:17
8
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How to pass password automatically for rsync SSH command?
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44
You should use a keyfile without passphrase for scripted ssh logins. This is obviously a securi...
How to determine if binary tree is balanced?
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edited Dec 29 '17 at 8:14
RBT
16k1010 gold badges115115 silver badges147147 bronze badges
answered Feb...
Handling warning for possible multiple enumeration of IEnumerable
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478
The problem with taking IEnumerable as a parameter is that it tells callers "I wish to enumera...