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NSDefaultRunLoopMode vs NSRunLoopCommonModes
... main thread) there is an option to start the thread in a run loop or not. If the thread runs some sort or long-running operation without interaction with external events and without timers, you do not need a run loop, but if your thread needs to respond to incoming events, it should be attached to ...
Rails filtering array of objects by attribute value
...es = [], []
@attachments.each do |attachment|
@logos << attachment if attachment.file_type == 'logo'
@images << attachment if attachment.file_type == 'image'
end
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How to have Emacs auto-refresh all buffers when files have changed on disk?
...
@Dave: (global-)auto-reverse-mode will not revert a file if the corresponding buffer is modified, so there should be no risk of you losing unsaved changes.
– Lindydancer
Mar 4 '12 at 15:23
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Can't import my own modules in Python
...Case.py, do
from ..myapp import SomeObject
However, this will work only if you are importing TestCase from the package. If you want to directly run python TestCase.py, you would have to mess with your path. This can be done within Python:
import sys
sys.path.append("..")
from myapp import SomeOb...
How to convert a string or integer to binary in Ruby?
...verts a decimal number to a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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What does a double * (splat) operator do
...can be used on the array you pass, the double splat can be used on hashes. If opts = {d: 40, e: 50}, then foo 10, opts, f: 60 will assign {f: 60} to c, whereas foo 10, **opts, f: 60 will assign {d: 40, e: 50, f: 60}. To achieve the second effect, previously you would have merged the arrays explicitl...
How can I access getSupportFragmentManager() in a fragment?
...:
FragmentManager fragManager = myContext.getSupportFragmentManager(); //If using fragments from support v4
or
FragmentManager fragManager = myContext.getFragmentManager();
You are done.
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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...saction finishes. Also, not all situations are quite handled- for example, if you try to select from table foo while another transaction is dropping it and creating a replacement table foo, then the blocked transaction will finally receive an error rather than finding the new foo table. (Edit: this ...
Delete all but the most recent X files in bash
...d globbing.
inability to distinguish between files and directories (i.e., if directories happened to be among the 5 most recently modified filesystem items, you'd effectively retain fewer than 5 files, and applying rm to directories will fail).
wnoise's answer addresses these issues, but the solu...
Git: How to squash all commits on branch
...D))
[That] automatically uses the branch you are currently on.
And if you use that, you can also use an alias, as the command doesn't rely on the branch name.
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