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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 ...
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...
Check if a class is derived from a generic class
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445
Try this code
static bool IsSubclassOfRawGeneric(Type generic, Type toCheck) {
while (toC...
How to deploy correctly when using Composer's develop / production switch?
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answered Feb 20 '14 at 22:42
Jasper N. BrouwerJasper N. Brouwer
19.9k44 gold badges4545 silver badges7474 bronze badges
...
how to get the last character of a string?
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1041
An elegant and short alternative, is the String.prototype.slice method.
Just by:
str.slice(-1...
adito-gateway -华为云免费SSL VPN解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 解压并移动到 /usr/
[root@adito mnt]# mv /mnt/adito-0.9.1 /usr/
4. 安装 adito
[root@adito usr]# cd adito-0.9.1/
[root@adito adito-0.9.1]# ant install
关闭防火墙
[root@adito ~]# service iptables stop
iptables: Setting chains to policy ACCEPT: filter [ OK ]
ipt...
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...
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...
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...