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Regex empty string or email
I found a lot of Regex email validation in SO but I did not find any that will accept an empty string. Is this possible through Regex only? Accepting either empty string or email only? I want to have this on Regex only.
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Javascript parseInt() with leading zeros
...th a '0', it's treated as base 8 (octal).
You can force the base by passing the base as the 2nd parameter.
parseInt("09", 10) // 9
According to the docs, the 2nd parameter is optional, but it's not always assumed to be 10, as you can see from your example.
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Switching between tabs in NERDTree
I've just started using the NERDTree vim plugin for my project.
9 Answers
9
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How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
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Here is a simple way without stragg or creating a function.
create table countries ( country_name varchar2 (100));
insert into countries values ('Albania');
insert into countries values ('Andorra');
insert into countries values ('Antigua');
SELECT SUBS...
How to remove newlines from beginning and end of a string?
I have a string that contains some text followed by a blank line. What's the best way to keep the part with text, but remove the whitespace newline from the end?
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How to insert a line break before an element using CSS
I feel like I saw a way, using the CSS content property, to insert a line break tag before an element. Obviously this doesn't work:
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What is the argument for printf that formats a long?
The printf function takes an argument type, such as %d or %i for a signed int . However, I don't see anything for a long value.
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pytest: assert almost equal
How to do assert almost equal with py.test for floats without resorting to something like:
7 Answers
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Eclipse / Android : “Errors running builder 'Android Pre Compiler' on project…”
Attempting to do some work on an Android project I haven't worked on for a couple of months, yet every time I attempt to build the project Eclipse throws up a dialog saying:
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Rake just one migration
I'm trying to run just one migration out of a whole bunch in my rails app. How can I do this? I don't want to run any of the migrations before or after it. Thanks.
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