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Ruby, !! operator (a/k/a the double-bang) [duplicate]
... a string that is forced into a boolean
# context (true), and then negated (false)
!!"hello" #-> this is a string that is forced into a boolean
# context (true), and then negated (false), and then
# negated again (true)
!!nil #-> this is a false-y val...
See my work log in jira
...
In Jira 7, I get there by going to my project, then Reports on the left, then it's the very last item on the page in my setup.
– Sbodd
Feb 21 '18 at 0:29
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Quickly create large file on a Windows system
... I'm confused here... if it is instantaneous, and it's not a sparse file, then how does it actually use up disk space?
– Jason S
Jan 4 '18 at 16:22
2
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Get image data url in JavaScript?
...he correct dimensions and copy the image data with the drawImage function. Then you can use the toDataURL function to get a data: url that has the base-64 encoded image. Note that the image must be fully loaded, or you'll just get back an empty (black, transparent) image.
It would be something like...
SASS - use variables across multiple files
...
in that file i declare variables like so:
$black: #000;
$white: #fff;
then I have the style.scss file in which i import all of my other scss files like this:
// Utilities
@import "utilities/variables";
// Base Rules
@import "base/normalize";
@import "base/global";
then, within any of the fi...
What are good examples of genetic algorithms/genetic programming solutions? [closed]
...s written in Visual Basic 3 [!] and I have no idea how I did anything back then, since VB3 didn't even have classes.
The application started with a population of randomly-generated fixed-length strings (the "gene" part), each of which corresponded to a specific shape in the minute-by-minute price d...
autolayout - make height of view relative to half superview height
...ill also need to setup bottom, left, and right constraints, like normal)
. Then select the constraint and navigate to the Attribute inspector:
Then you can adjust the multiplier. If you want it 50% of the super view leave it at 1, since it is aligned per the super's center. This is also a great w...
How do I resolve git saying “Commit your changes or stash them before you can merge”?
... pop them in reverse order.
To stash, type
git stash
Do the merge, and then pull the stash:
git stash pop
Discard the local changes
using git reset --hard
or git checkout -t -f remote/branch
Or: Discard local changes for a specific file
using git checkout filename
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Reason for Column is invalid in the select list because it is not contained in either an aggregate f
...ecause when we have some LEFT JOINs and group by the PK of the right table then reasonably we must be able to get the columns of the right table easily without ANY AMBIGUOUS situation (MySQL handles this).
– Alix
Aug 9 '16 at 7:53
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Can someone copyright a SQL query? [closed]
...y, if he work's completely independently, and just delivers a final result then he's probably not. If he works about like a normal employee, and they have control over things like his schedule and such, then there's a pretty good chance that he would qualify as just a temporary employee.
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