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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...eated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break dependencies all the time. Without this behaviour, every single 32-bit instruction in 64-bit mode would have to wait on something that happened before, even thoug...
How to solve error “Missing `secret_key_base` for 'production' environment” (Rails 4.1)
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208
I had the same problem and solved it by creating an environment variable to be loaded every ti...
Twitter Bootstrap modal: How to remove Slide down effect
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edited Apr 4 '14 at 20:59
digitalextremist
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How to add new elements to an array?
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edited Feb 13 '13 at 5:26
Paul Bellora
50.4k1717 gold badges123123 silver badges173173 bronze badges
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IntelliJ shortcut to show a popup of methods in a class that can be searched
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Use Navigate (View in older versions) | File Structure Popup (Ctrl+F12 on Windows, ⌘+F12 on OS X). Start typing method/symbol name to either narrow down the list or highlight the desired element. Press Enter to navigate to the selected element.
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Django's SuspiciousOperation Invalid HTTP_HOST header
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edited Apr 25 '13 at 8:04
Henrik Heimbuerger
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How do you delete an ActiveRecord object?
... like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition:...
Can an Option in a Select tag carry multiple values?
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One way to do this, first one an array, 2nd an object:
<select name="">
<option value='{"num_sequence":[0,1,2,3]}'>Option one</option>
<option value='{"foo":"bar","one":"two"}'>Option two</option>
</select&g...