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Finding # occurrences of a character in a string in Ruby

... Ruby method (1.9...) that can help me find the number of occurrences of a character in a string. I'm looking for all occurrences, not just the first one. ...
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How can I make a JPA OneToOne relation lazy

...y tested it: on non constrained side, use a one-to-one with a formula like select other_entity.id from other_entity where id = other_entity.id. Of course, this is not ideal for query performances. – Frédéric Apr 28 '16 at 6:48 ...
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Store select query's output in one array in postgres

... There are two ways. One is to aggregate: SELECT array_agg(column_name::TEXT) FROM information.schema.columns WHERE table_name = 'aean' The other is to use an array constructor: SELECT ARRAY( SELECT column_name FROM information.schema.columns WHERE table_name = ...
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JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements

I have two select elements, A and B: when A's selected option changes, B's options must be updated accordingly. Each element in A implies many elements in B, it's a one-to-many relationship (A contains nations, B should contain cities located in the given nation). ...
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Enter “&” symbol into a text Label in Windows Forms?

How would one enter special characters into a Label in C# (Windows Forms)? 5 Answers ...
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Checking oracle sid and database name

... I presume SELECT user FROM dual; should give you the current user and SELECT sys_context('userenv','instance_name') FROM dual; the name of the instance I believe you can get SID as SELECT sys_context('USERENV', 'SID') FROM DUAL; ...
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Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi

...here ... Now, what's missing then ? On my system, I get this: mysql> select version(); +------------+ | version() | +------------+ | 5.5.21-log | +------------+ 1 row in set (0.00 sec) mysql> SHOW GRANTS FOR 'root'@'localhost'; +------------------------------------------------------------...
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SQL update query using joins

...common table expression (since you're already on SQL 2005): with cte as ( select im.itemid ,im.sku as iSku ,gm.SKU as GSKU ,mm.ManufacturerId as ManuId ,mm.ManufacturerName ,im.mf_item_number ,mm.ManufacturerID , <your other field> from item_master im, gro...
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How to remove the border highlight on an input text element

When an HTML element is 'focused' (currently selected/tabbed into), many browsers (at least Safari and Chrome) will put a blue border around it. ...
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What does it mean when a CSS rule is grayed out in Chrome's element inspector?

... because one or more rules from the set are being applied to the currently selected DOM node. I guess, for the sake of completeness, dev tools shows all the rules from that set, whether they are applied or not. In the case where a rule is applied to the currently selected element due to inheritance...