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Transaction isolation levels relation with locks on table
... on the table
For example, you have 3 concurrent processes A, B and C. A starts a transaction, writes data and commit/rollback (depending on results). B just executes a SELECT statement to read data. C reads and updates data. All these process work on the same table T.
READ UNCOMMITTED - no lock...
Does height and width not apply to span?
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Span starts out as an inline element. You can change its display attribute to block, for instance, and its height/width attributes will start to take effect.
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Python name mangling
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You shouldn't start with private data and make it public as necessary. Rather, you should start by figuring out the interface of your object. I.e. you should start by figuring out what the world sees (the public stuff) and then figure out ...
How do I create a simple 'Hello World' module in Magento?
...ward "Here's how Magento works" resource I've been able to find. I've also started writing Magento tutorials at my own website.
Second, if you have a choice, and aren't an experienced programmer or don't have access to an experienced programmer (ideally in PHP and Java), pick another cart. Magento ...
Get list of passed arguments in Windows batch script (.bat)
...o use SHIFT [/n] for somewhat intuitive like accessing entire command line starting from n-th parameter.
– Van Jone
Mar 14 '13 at 11:45
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How do I automatically update a timestamp in PostgreSQL
... you (1) the time of the actual current moment, (2) the time the statement started, and (3) the time the transaction started. The example shown here is start of current transaction. You may or may not want that as opposed to the other two possibilities.
– Basil Bourque
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How to get first 5 characters from string [duplicate]
...5);
The second argument to substr is from what position what you want to start and third arguments is for how many characters you want to return.
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What is time_t ultimately a typedef to?
...y 32 or 64 bits wide)
which represents the number of seconds
since the start of the Unix epoch:
midnight UTC of January 1, 1970 (not
counting leap seconds). Some systems
correctly handle negative time values,
while others do not. Systems using a
32-bit time_t type are susceptible to
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How can I do something like a FlowLayout in Android?
...lexWrap = FlexWrap.WRAP
layoutManager.justifyContent = JustifyContent.FLEX_START
layoutManager.alignItems = AlignItems.FLEX_START
recyclerView.layoutManager=layoutManager
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What's the difference between Cache-Control: max-age=0 and no-cache?
...I can't vouch for its correctness):
In practice, IE and Firefox have
started treating the no-cache
directive as if it instructs the
browser not to even cache the page.
We started observing this behavior
about a year ago. We suspect that
this change was prompted by the
widespread ...