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How do you configure an OpenFileDialog to select folders?
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How to install gem from GitHub source?
...config.ru): require "bundler" Bundler.setup(:default) See bundler docs for more details
– Louis Sayers
Jul 18 '12 at 10:15
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
... this is notoriously slow.
Only ever use IN with a fixed list of values.
More tips
If you want to make queries faster,
don't do a SELECT * only select
the fields that you really need.
Make sure you have an index on relevant_field to speed up the equi-join.
Make sure to group by on the primary ...
How to make a valid Windows filename from an arbitrary string?
...tead of a simple string; the original version will take longer and consume more memory.
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How to vertically center content with variable height within a div?
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This should have much more upvotes! By the way, it also works with position: absolute, doesn't it?
– caw
Feb 3 '16 at 5:40
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Why does Oracle 9i treat an empty string as NULL?
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But it would be more precise if the second line was changed to '' is not always treated as NULL.
– ypercubeᵀᴹ
Jul 5 '11 at 7:48
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How can I print literal curly-brace characters in python string and also use .format on it?
... @Imray: {0} refers to the first argument to .format(). You can print more than one value like {0} {1} {2} as long as you give the same number of arguments to .format(). See docs.python.org/library/string.html#format-examples for extensive examples.
– Greg Hewgill
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multiprocessing: sharing a large read-only object between processes?
...ed buffers between the processes.
Solution 2
In some cases, you have a more complex structure – often a "fan-out" structure. In this case you have a parent with multiple children.
Parent opens source data. Parent forks a number of children.
Parent reads source, farms parts of the source ou...
How does a Java HashMap handle different objects with the same hash code?
...; the pair is stored in bucket number 235. (Note that one bucket can store more then one key-value pair).
When you lookup a value in the hashmap, by giving it a key, it will first look at the hash code of the key that you gave. The hashmap will then look into the corresponding bucket, and then it w...
How to insert newline in string literal?
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