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What happens when a computer program runs?

...tem, but modern OSes with virtual memory tend to load their process images and allocate memory something like this: +---------+ | stack | function-local variables, return addresses, return values, etc. | | often grows downward, commonly accessed via "push" and "pop" (but can be | ...
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How can I do an UPDATE statement with JOIN in SQL Server?

...to do it in ANSI/ISO (aka should work on any SQL DBMS), MySQL, SQL Server, and Oracle. Be advised that my suggested ANSI/ISO method will typically be much slower than the other two methods, but if you're using a SQL DBMS other than MySQL, SQL Server, or Oracle, then it may be the only way to go (e.g...
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Is there an alternative to string.Replace that is case-insensitive?

I need to search a string and replace all occurrences of %FirstName% and %PolicyAmount% with a value pulled from a database. The problem is the capitalization of FirstName varies. That prevents me from using the String.Replace() method. I've seen web pages on the subject that suggest ...
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How to check if BigDecimal variable == 0 in java?

...mal(0) every execution. FYI, BigDecimal also has constants BigDecimal.ONE and BigDecimal.TEN for your convenience. Note! The reason you can't use BigDecimal#equals() is that it takes scale into consideration: new BigDecimal("0").equals(BigDecimal.ZERO) // true new BigDecimal("0.00").equals(Big...
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Difference between events and delegates and its respective applications [closed]

...over delegates, other than being syntactical sugar. Perhaps I am misunderstanding, but it seems that event is just a placeholder for delegate. ...
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Can PNG image transparency be preserved when using PHP's GDlib imagecopyresampled?

...not the source image. Edit: full replacement code. See also answers below and their comments. This is not guaranteed to be be perfect in any way, but did achieve my needs at the time. $uploadTempFile = $myField[ 'tmp_name' ] list( $uploadWidth, $uploadHeight, $uploadType ) = getimagesize( $uplo...
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How do you implement a re-try-catch?

Try-catch is meant to help in the exception handling. This means somehow that it will help our system to be more robust: try to recover from an unexpected event. ...
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How to JSON serialize sets?

I have a Python set that contains objects with __hash__ and __eq__ methods in order to make certain no duplicates are included in the collection. ...
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How to return value from an asynchronous callback function? [duplicate]

...onse. If you have a lot of callbacks you might consider taking the plunge and use a promise library like Q. share | improve this answer | follow | ...
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Fix warning “Capturing [an object] strongly in this block is likely to lead to a retain cycle” in AR

... Replying to myself: My understanding of the documentation says that using keyword block and setting the variable to nil after using it inside the block should be ok, but it still shows the warning. __block ASIHTTPRequest *request = [[ASIHTTPRequest alloc...