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How to check if character is a letter in Javascript?
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answered Mar 25 '12 at 21:21
bezmaxbezmax
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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...
PHP json_decode() returns NULL with valid JSON?
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21 Answers
21
Active
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Ruby Hash to array of values
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265
Also, a bit simpler....
>> hash = { "a"=>["a", "b", "c"], "b"=>["b", "c"] }
=>...
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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Check if a string is null or empty in XSLT
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323
test="categoryName != ''"
Edit: This covers the most likely interpretation, in my opinion, of...
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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How to handle initializing and rendering subviews in Backbone.js?
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260
This is a great question. Backbone is great because of the lack of assumptions it makes, but i...
How do I decode a URL parameter using C#?
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answered Sep 10 '09 at 12:41
TheVillageIdiotTheVillageIdiot
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How do I import the javax.servlet API in my Eclipse project?
...ntainer-specific libraries like servlet-api.jar, jsp-api.jar, el-api.jar, j2ee.jar, javaee.jar, etc. It would only lead to future portability, compatibility, classpath and maintainability troubles, because your webapp would not work when it's deployed to a servletcontainer of a different make/versio...