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How to validate an email address in JavaScript
...)?
A further change you could make is to allow any two-letter country code top level domain, and only specific generic top level domains. This regex filters dummy email addresses like asdf@adsf.adsf. You will need to update it as new top-level domains are added.
[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\....
Learning to write a compiler [closed]
...This is a pretty vague question, I think; just because of the depth of the topic involved. A compiler can be decomposed into two separate parts, however; a top-half and a bottom-one. The top-half generally takes the source language and converts it into an intermediate representation, and the botto...
Can you have if-then-else logic in SQL? [duplicate]
...nt versions do have an IF ELSE functionality.
– Christopher Wade Cantley
Nov 28 '16 at 14:50
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How to vertically align an image inside a div
...;
width: 200px;
height: 200px;
}
img {
position: absolute;
top: 0;
bottom: 0;
margin: auto;
}
.image {
min-height: 50px
}
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How to detect if a script is being sourced
...tely it's not guaranteed to work. If the user has set BASH_ENV, $_ at the top of the script will be the last command run from BASH_ENV.
– Mikel
Apr 4 '11 at 22:14
31
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Create a CSS rule / class with jQuery at runtime
... position: fixed;\
z-index: 102;\
display:none;\
top:50%;\
left:50%;\
}")
.appendTo("head");
Noticed the back slashes? They are used to join strings that are on new lines. Leaving them out generates an error.
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Separators for Navigation
...For example:
#nav li + li {
background:url('seperator.gif') no-repeat top left;
padding-left: 10px
}
This CSS adds the image to every list item that follows another list item - in other words all of them but the first.
NB. Be aware the adjacent selector (li + li) doesn't work in IE6, so ...
Set select option 'selected', by value
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This deserves much more upvotes and belongs to the top. Its the proper way, no fiddling with prop, attr etc. and progagates all events properly.
– Polygnome
Mar 10 '17 at 12:49
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How to check if an object is nullable?
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Nice... Is this not the top answer cause it came later? I find the top answer so confusing.
– Vincent Buscarello
Oct 15 '18 at 19:10
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How do I set vertical space between list items?
...d be inclined to this which has the virtue of IE8 support.
li{
margin-top: 10px;
border:1px solid grey;
}
li:first-child {
margin-top:0;
}
JSFiddle
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