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How can I check if a single character appears in a string?
...
You can use string.indexOf('a').
If the char a is present in string :
it returns the the index of the first occurrence of the character in
the character sequence represented by this object, or -1 if the
character does not occur.
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What are the performance characteristics of sqlite with very large database files? [closed]
... complicates queries, but for me, it's a worthwhile tradeoff to be able to index this much data. An additional advantage is that I can just delete a whole db file to drop a day's worth of data (a common operation for my application).
I'd probably have to monitor table size per file as well to see w...
jQuery - add additional parameters on submit (NOT ajax)
...ase it should suffice to just add another hidden field to your form dynamically.
var input = $("<input>").attr("type", "hidden").val("Bla");
$('#form').append($(input));
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Possible to iterate backwards through a foreach?
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When working with a list (direct indexing), you cannot do it as efficiently as using a for loop.
Edit: Which generally means, when you are able to use a for loop, it's likely the correct method for this task. Plus, for as much as foreach is implemented in-o...
git index.lock File exists when I try to commit, but cannot delete the file
...ext who need this solution.
On linux/unix/gitbash/cygwin, try
rm -f .git/index.lock
On Windows Command Prompt, try:
del .git\index.lock
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Is there a way to 'uniq' by column?
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@eshwar just add more fields to the dictionary index! For instance, !_[$1][$2]++ can be used to sort by the first two fields. My awk-fu isn't strong enough to be able to unique on a range of fields, though. :(
– Soham Chowdhury
Jan 2...
Does MySQL foreign_key_checks affect the entire database?
... This means it can be set for session:
SET FOREIGN_KEY_CHECKS=0;
or globally:
SET GLOBAL FOREIGN_KEY_CHECKS=0;
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Understanding implicit in Scala
...(implicit requestHreader:RequestHeader)
in controller action is like
def index = Action{
implicit request =>
Ok(views.html.formpage())
}
if you do not mention request parameter as implicit explicitly then you must have been written-
def index = Action{
request =>
Ok(views.html.formpage...
How to git reset --hard a subdirectory?
..., shorter
git restore -s@ -SW -- aDirectory
That would replace both the index and working tree with HEAD content, like an reset --hard would, but for a specific path.
Original answer (2013)
Note (as commented by Dan Fabulich) that:
git checkout -- <path> doesn't do a hard reset: it r...
Get Base64 encode file-data from Input Form
...beginning stuff (up to the first ,), but that's no biggie. This would take all the fun out though.
The hard way:
If you want to try it the hard way (or it doesn't work), look at readAsArrayBuffer(). This will give you a Uint8Array and you can use the method specified. This is probably only useful ...