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How to replace a hash key with another key
...you should be aware that in ruby, unlike javascript and others, /^/ means 'start of string OR LINE', and /$/ means 'end of string OR LINE'. It's unlikely that the keys have newlines in them in this case, but you should be aware that using those two operators in ruby is not only error prone but als...
Find and replace strings in vim on multiple lines
...iour might be unexpected when in NORMAL mode: '< and '> point to the start and end of the last highlight done in one of the VISUAL modes. Instead, in NORMAL mode, the special line number . can be used, which simply means current line. Hence, you can find/replace only on the current line like t...
Counting DISTINCT over multiple columns
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the chance is not so small even, especially when you start combining columns (which is what it was supposed to be meant for). I was curious about this approach and in a particular case the checksum ended up with a count 10% smaller. If you think of it a bit longer, Checksum ju...
How do I get indices of N maximum values in a NumPy array?
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@FredFoo: why did you use -4? did you do that to start backward?(since k being positive or negative works the same for me! it only prints the smallest numbers first!
– Rika
Nov 19 '16 at 10:27
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How do you list the primary key of a SQL Server table?
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This is off to the right start, but needs to be joined with INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE as in the answer by Guy Starbuck.
– bstrong
Jan 5 '16 at 20:26
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How do I pass data between Activities in Android application?
... pass the session id to the signout activity in the Intent you're using to start the activity:
Intent intent = new Intent(getBaseContext(), SignoutActivity.class);
intent.putExtra("EXTRA_SESSION_ID", sessionId);
startActivity(intent);
Access that intent on next activity:
String sessionId = getIn...
Are HTML Image Maps still used?
...(in the world) a chance to update their links. Perhaps @orschiro you could start with the one in the article and add to the collaborative effort here at SO.
– David Newcomb
Apr 5 '16 at 1:29
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How to get an MD5 checksum in PowerShell
...tring($md5.ComputeHash([System.IO.File]::ReadAllBytes($someFilePath)))
Starting in PowerShell version 4, this is easy to do for files out of the box with the Get-FileHash cmdlet:
Get-FileHash <filepath> -Algorithm MD5
This is certainly preferable since it avoids the problems the first s...
What's the difference between '$(this)' and 'this'?
I am currently working through this tutorial: Getting Started with jQuery
7 Answers
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Attempt to present UIViewController on UIViewController whose view is not in the window hierarchy
Just started using Xcode 4.5 and I got this error in the console:
33 Answers
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