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What Does Question Mark Mean in Xcode Project Navigator?
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If you use source control, it would probably make sense to add it.
– Michael Krelin - hacker
Dec 15 '11 at 19:16
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Enter triggers button click
...lt;input type="submit"> . The buttons appear on the page in that order. If I'm in a text field anywhere in the form and press <Enter> , the button element's click event is triggered. I assume that's because the button element sits first.
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Ruby Metaprogramming: dynamic instance variable names
...ue) }
Or, more briefly,
hash.each &method(:instance_variable_set)
If your instance variable names are missing the "@" (as they are in the OP's example), you'll need to add them, so it would be more like:
hash.each { |name, value| instance_variable_set("@#{name}", value) }
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Setting focus on an HTML input box on page load
...works in all current browsers except IE9 and below). Only call your script if it's IE9 or earlier, or an older version of other browsers.
<input type="text" name="fname" autofocus>
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Is there a short contains function for lists?
I see people are using any to gather another list to see if an item exists in a list, but is there a quick way to just do?:
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Does free(ptr) where ptr is NULL corrupt memory?
... ptr to be deallocated, that is, made
available for further allocation. If ptr is a null pointer, no action occurs.
See ISO-IEC 9899.
That being said, when looking at different codebases in the wild, you'll notice people sometimes do:
if (ptr)
free(ptr);
This is because some C runtimes (I...
Matplotlib plots: removing axis, legends and white spaces
... solutions in this thread, and linked ones, worked. However explicitly specifying bbox_inches=0 did the trick.
– kadrach
Feb 23 '15 at 4:13
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MySql : Grant read only options?
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If there is any single privilege that stands for ALL READ operations on database.
It depends on how you define "all read."
"Reading" from tables and views is the SELECT privilege. If that's what you mean by "all read" then...
How do I push a new local branch to a remote Git repository and track it too?
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It's also worth noting that if you have an existing tracking branch already set on the branch you're pushing, and push.default is set to upstream, this will not do what you think it will do. It will try to push over the existing tracking branch. Use: gi...
Undo changes in entity framework entities
...e common way to "revert changes" is disposing context and reload entities. If you want to avoid reloading you must create clones of entities and modify those clones in new object context. If user cancel changes you will still have original entities.
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