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Finding duplicates in O(n) time and O(1) space
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edited Nov 25 '15 at 9:44
answered Apr 21 '11 at 3:54
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Hash collision in git
...aracter times 40... 160 bits. Now we know 10 bits is approximately 1000 (1024 to be exact) meaning that there are 1 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 different SHA-1 hashes... 1048.
What is this equivalent of? Well the Moon is made up of about 1047 atoms. So if we have ...
Check if directory mounted with bash
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answered Feb 23 '12 at 23:12
Christopher NeylanChristopher Neylan
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How do I disable the “Press ENTER or type command to continue” prompt in Vim?
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answered May 20 '09 at 23:55
TabithaTabitha
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Adding up BigDecimals using Streams
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3.1. We supply an identity value for addition, namely BigDecimal.ZERO.
3.2. We specify the BinaryOperator<BigDecimal>, which adds two BigDecimal's, via a method reference BigDecimal::add.
Updated answer, after edit
I see that you have added new data, therefore the new answer will become:
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Create unique constraint with null columns
..., menu_id, recipe_id)
WHERE menu_id IS NOT NULL;
CREATE UNIQUE INDEX favo_2col_uni_idx ON favorites (user_id, recipe_id)
WHERE menu_id IS NULL;
This way, there can only be one combination of (user_id, recipe_id) where menu_id IS NULL, effectively implementing the desired constraint.
Possible dra...
Calling startActivity() from outside of an Activity context
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24 Answers
24
Active
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Gradle proxy configuration
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213
Refinement over Daniel's response:
HTTP Only Proxy configuration
gradlew -Dhttp.proxyHos...
Grab a segment of an array in Java without creating a new array on heap
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(Honestly, I feel my answer is worthy of deletion. The answer by @unique72 is correct. Imma let this edit sit for a bit and then I shall delete this answer.)
I don't know of a way to do this directly with arrays without additional heap allocation, but the other answers using a sub-list wrapper...
How to convert a clojure keyword into a string?
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kotarakkotarak
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