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How can I use PowerShell with the Visual Studio Command Prompt?
...output of cmd.exe. We also ask cmd.exe to output
## the environment table after the batch file completes
cmd.exe /c " `"$Path`" $Parameters && set > `"$tempFile`" "
## Go through the environment variables in the temp file.
## For each of them, set the variable in our...
Generate GUID in MySQL for existing Data?
I've just imported a bunch of data to a MySQL table and I have a column "GUID" that I want to basically fill down all existing rows with new and unique random GUID's.
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Add days to JavaScript Date
... and that sort of thing is best avoided. ECMA saw fit to treat Date as a mutable class rather than an immutable structure.
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Aggregate function in an SQL update query?
I'm trying to set the value in one table to the sum of the values in another table. Something along these lines:
6 Answers...
What is the best way to solve an Objective-C namespace collision?
...not changing the address of the original symbol. Objective-C uses a lookup table to map class names to addresses, and it's a 1-1 mapping, so you can't have two classes with the same name. Thus, to load both classes, one of them must have their name changed. However, when other classes need to access...
Salting Your Password: Best Practices?
... Site-wide random salt is bad, since an attacker can precompute rainbow tables and grab your entire user database. If you don't understand this, please don't write login/security systems :) - you NEED per-user salts.
– snemarch
Mar 23 '09 at 20:52
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Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
...is raised:
Then within the command window, call GetErrors method on the table getting the error.
For C#, the command would be ? dataTable.GetErrors()
For VB, the command is ? dataTable.GetErrors
This will show you all datarows which have an error. You can get then look at the RowError for each...
Insert new column into table in sqlite?
I have a table with columns name , qty , rate . Now I need to add a new column COLNew in between the name and qty columns. How do I add a new column in between two columns?
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Insert Update trigger how to determine if insert or update
I need to write an Insert, Update Trigger on table A which will delete all rows from table B whose one column (say Desc) has values like the value inserted/updated in the table A's column (say Col1). How would I go around writing it so that I can handle both Update and Insert cases. How would I dete...
Display / print all rows of a tibble (tbl_df)
...ated by the dplyr data frame manipulation package in R. It prevents long table outputs when accidentally calling the data frame.
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