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Remove duplicate rows in MySQL
... is to add a UNIQUE index on the 3 columns. When you write the ALTER statem>me m>nt, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_nam>me m> (site_id, title, company);
This will drop all the duplicate rows. As an added benefit, future INSERTs that are duplicates will ...
How do I pre-populate a jQuery Datepicker textbox with today's date?
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Update: There are reports this no longer works in Chrom>me m>.
This is concise and does the job (obsolete):
$(".date-pick").datepicker('setDate', new Date());
This is less concise, utilizing chaining allows it to work in chrom>me m> (2019-06-04):
$(".date-pick").datepicker().datepick...
Git: “Not currently on any branch.” Is there an easy way to get back on a branch, while keeping the
So I've done som>me m> work in the repository and when I'm about to commit I realize that I'm not currently on any branch.
9 Ans...
Git - Undo pushed commits
...oject in a remote repository, synchronized with a local repository (developm>me m>nt) and the server one (prod). I've been making som>me m> commited changes already pushed to remote and pulled from the server. Now, I want to undo those changes. So I could just git checkout to the commit before the changes a...
How do I append one string to another in Python?
...s to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
used to be O(n^2), but now it is O(n).
From the source (bytesobject.c):
void
PyBytes_ConcatAndDel(register PyObject **pv, register PyObject *w)
{
PyBytes_C...
Cost of len() function
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It's O(1) (constant tim>me m>, not depending of actual length of the elem>me m>nt - very fast) on every type you've m>me m>ntioned, plus set and others such as array.array.
share
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Calculating distance between two points, using latitude longitude?
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The Java code given by Domm>me m>r above gives slightly incorrect results but the small errors add up if you are processing say a GPS track. Here is an implem>me m>ntation of the Haversine m>me m>thod in Java which also takes into account height differences between ...
Getting the difference between two repositories
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not working for m>me m>, it's throwing: fatal: ambiguous argum>me m>nt 'remotes/b/master': unknown revision or path not in the working tree. Use '--' to separate paths from revisions, like this: 'git <command> [<revision>...] -- [<file&...
“unrecognized import path” with go get
...nge your GOROOT path to the value of /usr/local/go/bin.
It seems that you m>me m>ant to have your workspace (GOPATH) located at /hom>me m>/m>me m>/go.
This might fix your problem.
Add this to the bottom of your bash profile, located here => $HOm>ME m>/.profile
export GOROOT=/usr/local/go
export GOPATH=$HOm>ME m>/go
ex...
Swift how to sort array of custom objects by property value
lets say we have a custom class nam>me m>d imageFile and this class contains two properties.
18 Answers
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