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Check if a table exists in Rails
...ake task that won't work unless a table exists. I'm working with more than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table.
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How do I directly modify a Google Chrome Extension File? (.CRX)
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Feb 12 '10 at 7:36
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Distinct not working with LINQ to Objects
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162
LINQ Distinct is not that smart when it comes to custom objects.
All it does is look at your li...
How to use sed to replace only the first occurrence in a file?
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23 Answers
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What does “mro()” do?
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214
Follow along...:
>>> class A(object): pass
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>>> A.__mro__
(<class '_...
.NET HttpClient. How to POST string value?
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Todd Menier
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answered Mar 2 '13 at 16:22
Darin Dimitrov...
case-insensitive list sorting, without lowercasing the result?
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202
In Python 3.3+ there is the str.casefold method that's specifically designed for caseless matc...
How do I replace the *first instance* of a string in .NET?
...DIT: As @itsmatt mentioned, there's also Regex.Replace(String, String, Int32), which can do the same, but is probably more expensive at runtime, since it's utilizing a full featured parser where my method does one find and three string concatenations.
EDIT2: If this is a common task, you might want...
How can I strip first X characters from string using sed?
...ux in a small industrial box. I have a variable containing the text pid: 1234 and I want to strip first X characters from the line, so only 1234 stays. I have more variables I need to "clean", so I need to cut away X first characters and ${string:5} doesn't work for some reason in my system.
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