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What are DDL and DML?
I have heard the terms DDL and DML in reference to databases, but I don't understand what they are.
12 Answers
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Remove all files em>x m>cept some from a directory
When using sudo rm -r , how can I delete all files, with the em>x m>ception of the following:
19 Answers
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MySQL OPTIMIZE all tables?
MySQL has an OPTIMIZE TABLE command which can be used to reclaim unused space in a MySQL install. Is there a way (built-in command or common stored procedure) to run this optimization for every table in the database and/or server install, or is this something you'd have to script up yourself?
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JavaScript seconds to time string with format hh:mm:ss
I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss)
43 Answers
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What's the difference between utf8_general_ci and utf8_unicode_ci?
...s are both for the UTF-8 character encoding. The differences are in how tem>x m>t is sorted and compared.
Note: In MySQL you have to use utf8mb4 rather than utf8. Confusingly, utf8 is a flawed UTF-8 implementation from early MySQL versions which remains only for backward compatibility. The fim>x m>ed version...
How to get a list of current open windows/process with Java?
...s any one know how do I get the current open windows or process of a local machine using Java?
14 Answers
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How can I check if a command em>x m>ists in a shell script? [duplicate]
I am writing my first shell script. In my script I would like to check if a certain command em>x m>ists, and if not, install the em>x m>ecutable. How would I check if this command em>x m>ists?
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Single Page Application: advantages and disadvantages [closed]
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Let's look at one of the most popular SPA sites, GMail.
1. SPA is em>x m>tremely good for very responsive sites:
Server-side rendering is not as hard as it used to be with simple techniques like keeping a #hash in the URL, or more recently HTML5 pushState. With this approach the em>x m>act state of t...
Find() vs. Where().FirstOrDefault()
...people using Where.FirstOrDefault() to do a search and grab the first element. Why not just use Find() ? Is there an advantage to the other? I couldn't tell a difference.
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What is the rationale behind having companion objects in Scala?
Is there a case where a companion object (singleton) for a class is needed? Why would I want to create a class, say Foo and also create a companion object for it?
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