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Show an image preview before upload
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Now How to cancel some of images for uploading and then to submit the form ? It'll really helpful to me.
– Hardik Sondagar
Dec 28 '12 at 12:32
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Why are local variables not initialized in Java?
... Why complicate things? Write the try-finally block this way, and you KNOW the variable has a valid value. No null-checking required.
– Rob Kennedy
Jan 6 '09 at 16:09
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How do I target only Internet Explorer 10 for certain situations like Internet Explorer-specific CSS
...ng a repaint, again IE5/6/7-level stuff
A few strains of WebKit have been known to outright lie about support for certain features, meaning they actually defeat feature detection mechanisms, of all things
If you do have a legitimate reason to be targeting certain browsers, by all means sniff them ...
Difference between innerText, innerHTML, and childNodes[].value?
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If I understand the MDN correctly, innerText is now part of the Standard and should be supported by Firefox from version 45 on; maybe reason for an update to this great answer @faraz
– domsson
Jun 28 '17 at 10:04
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Are multiple `.gitignore`s frowned on?
...ypically wind up with a fair bit of duplication.
Pro multiple
Scopes "knowledge" to the part of the file tree where it is needed.
Since Git only tracks files, an empty .gitignore is the only way to commit an "empty" directory.
(And before Git 1.8, the only way to exclude a pattern like my/**.ex...
What is a rune?
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A string is different than a rune. In runes we use
single-quotes ''
Now a rune is also an alias for int32...Uh What?
The reason rune is an alias for int32 is because we see that with coding schemes such as below
each character maps to some number and so it's the number that we are storing....
Working copy XXX locked and cleanup failed in SVN
...th Tortoise/SVN 1.7 (or at least I couldn't find any lock file as there is now a centralised DB with the metadata).
– pesche
Oct 6 '11 at 6:59
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When do we need curly braces around shell variables?
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{} is known as brace expansion. ${} is known as variable expansion. They do different things. I'd upvote you except for the no expansion bit.
– Spencer Rathbun
Jan 5 '12 at 21:52
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How do I determine whether my calculation of pi is accurate?
...rd, the common practice is just to verify the computed digits against the known values. So that's simple enough.
In fact, I have a webpage that lists snippets of digits for the purpose of verifying computations against them: http://www.numberworld.org/digits/Pi/
But when you get into world-recor...
Are loops really faster in reverse?
...o be slower than the original one. When optimizing, always measure so you know exactly what impact your changes had.
– jalf
Oct 30 '12 at 11:59
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