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Why should I use a pointer rather than the object itself?

I'm coming from a Java background and have started working with objects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration: ...
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How to retrieve a file from a server via SFTP?

...erred library for a few large open source projects, including Eclipse, Ant and Apache Commons HttpClient, amongst others. It supports both user/pass and certificate-based logins nicely, as well as all a whole host of other yummy SSH2 features. Here's a simple remote file retrieve over SFTP. Error...
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How to detect a textbox's content has changed

...box').on('input', function() { // do your stuff }); ...which is nice and clean, but may be extended further to: jQuery('#some_text_box').on('input propertychange paste', function() { // do your stuff }); share ...
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Is it possible to use AutoLayout with UITableView's tableHeaderView?

... I asked and answered a similar question here. In summary, I add the header once and use it to find the required height. That height can then be applied to the header, and the header is set a second time to reflect the change. - (voi...
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Android set height and width of Custom view programmatically

...method to measure the view more precisely depending on the space available and layout constraints (wrap_content, match_parent, or a fixed size). You can find an example on how to override onMeasure() by looking at the android docs and the LabelView sample in your SDK directory. ...
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Deprecated warning for Rails 4 has_many with order

... In Rails 4, :order has been deprecated and needs to be replaced with lambda scope block as shown in the warning you've posted in the question. Another point to note is that this scope block needs to be passed before any other association options such as dependent...
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How to pass “Null” (a real surname!) to a SOAP web service in ActionScript 3

...I thought this was a coercion bug where null was getting coerced to "null" and a test of "null" == null was passing. It's not. I was close, but so very, very wrong. Sorry about that! I've since done lots of fiddling on wonderfl.net and tracing through the code in mx.rpc.xml.*. At line 1795 of XMLEn...
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How do I delete from multiple tables using INNER JOIN in SQL server

...table. As a side note, you can also do inserted.* on an insert statement, and both inserted.* and deleted.* on an update statement. EDIT: Also, have you considered adding a trigger on table1 to delete from table2 + 3? You'll be inside of an implicit transaction, and will also have the "inserted." ...
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ElasticSearch: Unassigned Shards, how to fix?

...er, if you've disabled shard allocation (perhaps you did a rolling restart and forgot to re-enable it), you can re-enable shard allocation. # v0.90.x and earlier curl -XPUT 'localhost:9200/_settings' -d '{ "index.routing.allocation.disable_allocation": false }' # v1.0+ curl -XPUT 'localhost:92...
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Can someone explain in simple terms to me what a directed acyclic graph is?

...answered Feb 17 '10 at 19:29 Roland BoumanRoland Bouman 27.5k55 gold badges6161 silver badges6464 bronze badges ...