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What is in your Mathematica tool bag? [closed]

...pplication of Reap and Sow which mimics/extends the behavior of GatherBy: SelectEquivalents[x_List,f_:Identity, g_:Identity, h_:(#2&)]:= Reap[Sow[g[#],{f[#]}]&/@x, _, h][[2]]; This allows me to group lists by any criteria and transform them in the process. The way it works is that a c...
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“Unable to find manifest signing certificate in the certificate store” - even when add new key

...t click on your project click on properties usually on the left-hand side, select the "Signing" tab check off the Sign the ClickOnce manifests Make sure you save! share | improve this answer ...
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How to set auto increment primary key in PostgreSQL?

...able(moobars,foobars) values('worldwide interblag','2012-05-02') Step 3, select * from your table: el@voyager$ psql -U pgadmin -d kurz_prod -c "select * from epictable" Step 4, interpret the output: mytable_key | moobars | foobars -------------+-----------------------+------...
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Use ASP.NET MVC validation with jquery ajax?

... where modelState[x].Errors.Count > 0 select new { key = x, errors = modelState[x].Errors. Select(y => y.ErrorMessage...
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How to disable UITextField editing but still accept touch?

... inputView . Its all good, except that I can edit by copy, paste, cut and select text, and I don't want it. Only the Picker should modify text field. ...
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How can I set the value of a DropDownList using jQuery?

... have described above, yet the range validator keeps failing telling me to select a value (when the value selected is within range). Please see my question stackoverflow.com/questions/3165033/… – James Jul 7 '10 at 13:14 ...
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How can I convert a hex string to a byte array? [duplicate]

...gth) .Where(x => x % 2 == 0) .Select(x => Convert.ToByte(hex.Substring(x, 2), 16)) .ToArray(); } share | improve this answer ...
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If table exists drop table then create it, if it does not exist just create it

...up the old table, obviously. Wrapping all statements with something like SELECT GET_LOCK('__upgrade', -1); ... DO RELEASE_LOCK('__upgrade'); allows to just invoke all statements sequentially without error checking, but I don't think it's a good idea: complexity increases and locking functions in M...
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Export a stash to another computer

... After reading this answer one thing I was wondering was how to select a particular stash from all my stashes. The answer to that is here: stackoverflow.com/a/1910142/1148702 . In this case I ended up doing: git stash show "stash@{0}" -p > patch instead of the OP's second shell command...
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How to apply two CSS classes to a single element

...To target elements that contain all of the specified classes, use this CSS selector (no space) (ref): .c1.c2 { } share | improve this answer | follow | ...