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What's the best way to check if a file exists in C?
... useful information (when was it last updated, how big is it, owner and/or group that owns the file, access permissions, and so on).
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What is the advantage of using abstract classes instead of traits?
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If you plan to distribute it in compiled form, and you expect outside
groups to write classes inheriting from it, you might lean towards
using an abstract class. The issue is that when a trait gains or loses
a member, any classes that inherit from it must be recompiled, even if
they have ...
What is an AngularJS directive?
...n"s (as @WTK already mentioned).
Directives can also componentize HTML -- group a bunch of HTML into some reusable component. If you find yourself using ng-include to pull in lots of HTML, it is probably time to refactor into directives.
What design pattern does it embody, or alternatively, ho...
Embed SVG in SVG?
...end of the metadata:
</metadata>
<g
id="layer1"
inkscape:groupmode="layer"
inkscape:label="Layer 1">
Insert this line after that group tag:
<use xlink:href="OTHERFILE.svg#layer1" y="0" x="0" />
In this case we are including OTHERFILE.svg into the file, and all of lay...
Difference between /res and /assets directories
... Assets Have no location and name restrictions. In other
words they can be grouped in whatever directories we wish
Raw files Are easy to refer to from Java as well as from xml (i.e
you can refer a file in raw from manifest or other xml file).
Saving asset files here instead of in the assets/ directo...
What's the difference between Unicode and UTF-8? [duplicate]
...tand these concepts
as well as we should. If you feel you belong to this group, you should
read this ultra short introduction to character sets and encodings.
Actually, comparing UTF-8 and Unicode is like comparing apples and
oranges:
UTF-8 is an encoding - Unicode is a character
s...
Why use the INCLUDE clause when creating an index?
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If the column is not in the WHERE/JOIN/GROUP BY/ORDER BY, but only in the column list in the SELECT clause.
The INCLUDE clause adds the data at the lowest/leaf level, rather than in the index tree.
This makes the index smaller because it's not part of the tree
I...
SELECT * WHERE NOT EXISTS
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how would I use this in a HAVING clause? aka group by X having exist [row with employeeID = e.id]
– phil294
Jul 7 '16 at 15:45
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Search for one value in any column of any table inside a database
...Name, ColumnName, ColumnValue, ColumnType, COUNT(*) AS Count FROM #Results
GROUP BY TableName, ColumnName, ColumnValue, ColumnType
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Why does Java allow us to compile a class with a name different than the file name?
...ing nested classes include the following:
It is a way of logically grouping classes that are only used in one place: If a class is useful to only one other class, then it is logical to embed it in that class and keep the two together. Nesting such "helper classes" makes their package more st...