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CSS: Change image src on img:hover
...
.img-wrapper {
display: inline-block;
background-image: url(https://www.w3schools.com/w3images/fjords.jpg);
}
.img-wrapper > img {
vertical-align: top;
}
.img-wrapper > img:hover {
opacity: 0;
}
<div class="img-wrapper">
<img src="https://www.w3schools.com/w3...
Add unique constraint to combination of two columns
...ert the row and returning an exception (exceptions are expensive).
http://www.sqlperformance.com/2012/08/t-sql-queries/error-handling
http://www.mssqltips.com/sqlservertip/2632/checking-for-potential-constraint-violations-before-entering-sql-server-try-and-catch-logic/
If you want to prevent exce...
Where to find the win32api module for Python? [closed]
...it hasn't let me down yet.
UC Irvine Python Extension Repository - http://www.lfd.uci.edu/~gohlke/pythonlibs
pywin32 module - http://www.lfd.uci.edu/~gohlke/pythonlibs/#pywin32
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Twitter Bootstrap: div in container with 100% height
...ml, body {
height: 100%;
}
.min-100 {
min-height: 100%;
}
https://www.codeply.com/go/dTaVyMah1U
Option 2_ Use vh units:
.vh-100 {
min-height: 100vh;
}
https://www.codeply.com/go/kMahVdZyGj
Then, use flexbox direction column d-flex flex-column on the container, and flex-grow-1 on an...
How to use if - else structure in a batch file?
...
Community♦
111 silver badge
answered Aug 8 '16 at 2:36
sambul35sambul35
9701111 silver ba...
S3 Error: The difference between the request time and the current time is too large
... then restart ntp service:
sudo service ntp restart
Source: https://www.allcloud.io/how-to/how-to-fix-amazon-s3-requesttimetooskewed/
And a more general article on keeping your time synchronized with NTP:
https://www.digitalocean.com/community/tutorials/how-to-set-up-time-synchronization-on-...
Simplest two-way encryption using PHP
...
Community♦
111 silver badge
answered Feb 13 '12 at 14:26
472084472084
16.8k1010 gold badg...
What does the LayoutInflater attachToRoot parameter mean?
...
Community♦
111 silver badge
answered Sep 24 '12 at 15:47
LuksprogLuksprog
84.4k1616 gold ...
How to get HttpClient to pass credentials along with the request?
...
Community♦
111 silver badge
answered Oct 1 '12 at 14:43
JoshuaJoshua
3,8132121 silver bad...
Which cryptographic hash function should I choose?
...ettEric Burnett
2,26511 gold badge2020 silver badges1111 bronze badges
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