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Default value of 'boolean' and 'Boolean' in Java
...t of null. Primitives have different default values:
boolean -> false
byte, char, short, int, long -> 0
float, double -> 0.0
Note (2): void has a wrapper Void which also has a default of null and is it's only possible value (without using hacks).
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Difference between val() and text()
...ame" />
<input type="checkbox" name="vehicle" value="Bike" id="chk_byk" class="ss">bike<br>
<script type="text/javascript">
$(document).ready(function () {
$("#btn_submit").click(function () {
alert($("#chk_byk").val());
});
...
Haskell composition (.) vs F#'s pipe forward operator (|>)
...reason that (|>) not used in Haskell is that its place is already taken by ($).
Also, speaking from a bit of F# experience, I think (|>) is so popular in F# code because it resembles the Subject.Verb(Object) structure of OO. Since F# is aiming for a smooth functional/OO integration, Subject |...
How to get the PATH environment-variable separator in Python?
... If, like me, you didn't read the body of this question and just went by the title, you'll think this is the character that separates elements of a filesystem path (forward slash on Linux and MacOSX, backslash on Windows). It's not, it the character that separates elements of a shell PATH that...
SQLite Reset Primary Key Field
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You can reset by update sequence after deleted rows in your-table
UPDATE SQLITE_SEQUENCE SET SEQ=0 WHERE NAME='table_name';
share
|
imp...
How to resume Fragment from BackStack if exists
...pop the back stack based on either the transaction name or the id provided by commit. Using the name may be easier since it shouldn't require keeping track of a number that may change and reinforces the "unique back stack entry" logic.
Since you want only one back stack entry per Fragment, make the...
How do API Keys and Secret Keys work? Would it be secure if I have to pass my API and secret keys to
..., etc. Now, we can make another function, call it f', that goes backwards, by adding seven instead of three. f'(5) = 2, f'(1) = 8, etc.
That's an example of a two-way function and its inverse. Theoretically, any mathematical functions that maps one thing to another can be reversed. In practice, tho...
Primary key or Unique index?
...swered May 26 '10 at 20:20
Mark ByersMark Byers
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Create a File object in memory from a string in Java
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Usually when a method accepts a file, there's another method nearby that accepts a stream. If this isn't the case, the API is badly coded. Otherwise, you can use temporary files, where permission is usually granted in many cases. If it's applet, you can request write permission.
An exampl...
How do I check the operating system in Python?
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You can get a pretty coarse idea of the OS you're using by checking sys.platform.
Once you have that information you can use it to determine if calling something like os.uname() is appropriate to gather more specific information. You could also use something like Python System I...