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Evaluate if list is empty JSTL
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How to think in data stores instead of databases?
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The datastore makes no distinction between inserts and updates. When you call put() on an entity, that entity gets stored to the datastore with its unique key, and anything that has that key gets overwritten. Basically, each entity kind in the datastore acts like an enormous map or sorted list.
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Are email addresses case sensitive?
...uish different addresses based on case". We use MS Exchange which I would call "widely used".
– Matthew James Briggs
Nov 24 '15 at 20:14
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Struct like objects in Java
... be explicitly set or gotten-often that happens as a side effect of method calls.
One example of appropriate public instance variables is the case where the class is essentially a data structure, with no behavior. In other words, if you would have used a struct instead of a class (if Java supported...
How to list empty folders in linux
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Incidentally, to remove: find . -type d -empty -exec rmdir {} \;
– Scott
Mar 1 '15 at 4:01
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How to check if a specific key is present in a hash or not?
...nswered Aug 21 '13 at 13:09
Bozhidar BatsovBozhidar Batsov
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How do I create a transparent Activity on Android?
..."?>
<resources>
<style name="Theme.Transparent" parent="android:Theme">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowContentOverlay">@n...
MySQL offset infinite rows
...ySQL made the Limit clause optional, as it is, but also with an offset provided... but no! I've seen this 18446744073709551615 scatter all over the code and I was blaming lazy programmers, but it's a design feature!
– Petruza
May 24 '10 at 15:10
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Writing a compiler in its own language
...a compiler for language Foo cannot itself be written in Foo. More specifically, the first compiler for language Foo cannot be written in Foo, but any subsequent compiler could be written for Foo .
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How can I send an inner to the bottom of its parent ?
The div inside another div picture and code below. Because there will be text and images of the parent div. And red div will be the last element of the parent div.
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