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How to round up a number to nearest 10?
... up/down using the third parameter (mode) of round(). round($input,-1, PHP_ROUND_HALF_UP)
– Daren Schwenke
Aug 31 '16 at 16:45
4
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Hidden features of Ruby
...ch means Proc objects can be used in case statements like so:
def multiple_of(factor)
Proc.new{|product| product.modulo(factor).zero?}
end
case number
when multiple_of(3)
puts "Multiple of 3"
when multiple_of(7)
puts "Multiple of 7"
end
...
How can I test if a letter in a string is uppercase or lowercase using JavaScript?
...
assert(!isLowerCase("Ü"))
assert(!isLowerCase("4"))
assert(!isLowerCase("_"))
To check one letter just call it using isLowerCase(str[charIndex])
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How do I get the currently displayed fragment?
...u should use a tag.
fragTrans.replace(android.R.id.content, myFragment, "MY_FRAGMENT");
...and later if you want to check if the fragment is visible:
MyFragment myFragment = (MyFragment)getSupportFragmentManager().findFragmentByTag("MY_FRAGMENT");
if (myFragment != null && myFragment.isVisi...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
文章源自：https://www.gandalf.site/2018/11/ble_26.html
商业级的Ellisys BEX400侦听工具最为符合对BLE流量捕获及分析的要求，然而售价过于昂贵；
其次，作为开源硬件且配有混杂模式追踪的“超牙”设备——Ubertooth One拥有二次开发和嗅...
How to check if hex color is “too black”?
...nipulation in javascript in a while. cool stuff. en.wikipedia.org/wiki/Rec._709#Luma_coefficients
– jbabey
Aug 20 '12 at 18:54
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How to output in CLI during execution of PHP Unit tests?
...han the --verbose command line option:
class TestSomething extends PHPUnit_Framework_TestCase {
function testSomething() {
$myDebugVar = array(1, 2, 3);
fwrite(STDERR, print_r($myDebugVar, TRUE));
}
}
This lets you dump anything to your console at any time without all the ...
Unable to modify ArrayAdapter in ListView: UnsupportedOperationException
...gt; adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, lst);
Cheers!
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Position geom_text on dodged barplot
...
Is this what you want?
ggplot(bar) +
geom_bar(aes(variable, `(all)`, fill = ustanova), position = "dodge") +
geom_text(aes(variable, `(all)`, label = sprintf("%2.1f", `(all)`)),
position = position_dodge(width = 1)) +
coord_flip()
The key is usin...
Check free disk space for current partition in bash
...
# less than 10GBs free!
fi;
Also for an installer to df -k $INSTALL_TARGET_DIRECTORY might make more sense than df -k "$PWD".
Finally, please note that the --output flag is not available in every version of df / linux.
...