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Ruby on Rails: How do I add placeholder text to a f.text_field?
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271
With rails >= 3.0, you can simply use the placeholder option.
f.text_field :attr, placeholde...
Re-raise exception with a different type and message, preserving existing information
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Python 3 introduced exception chaining (as described in PEP 3134). This allows, when raising an exception, to cite an existing exception as the “cause”:
try:
frobnicate()
except KeyError as exc:
raise ValueError("Bad grape") from exc
The caught exception (exc, a KeyError) ...
How to move an element into another element?
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15 Answers
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javascript function leading bang ! syntax
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edited Aug 30 '14 at 7:27
answered Apr 29 '11 at 3:08
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How can I get the current stack trace in Java?
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21 Answers
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what is the difference between ?:, ?! and ?= in regex?
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160
The difference between ?= and ?! is that the former requires the given expression to match and...
How do you render primitives as wireframes in OpenGL?
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git ignore all files of a certain type, except those in a specific subfolder
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1 Answer
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What is the format specifier for unsigned short int?
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156
Try using the "%h" modifier:
scanf("%hu", &length);
^
ISO/IEC 9899:201x - 7....