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What does scale horizontally and scale vertically mean? [duplicate]
...ee layer architecture with the database on the fourth, what does scaling horizontally and scaling vertically mean?
2 An...
How to override a JavaScript function
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var origParseFloat = parseFloat;
parseFloat = function(str) {
alert("And I'm in your floats!");
return origParseFloat(str);
}
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ruby operator “=~” [duplicate]
In ruby, I read some of the operators, but I couldn't find =~ . What is =~ for, or what does it mean? The program that I saw has
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JUnit assertEquals(double expected, double actual, double epsilon) [duplicate]
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Epsilon is your "fuzz factor," since doubles may not be exactly equal. Epsilon lets you describe how close they have to be.
If you were expecting 3.14159 but would take anywhere from 3.14059 to 3.14259 (that is, within 0.001), then you should write s...
How to use setInterval and clearInterval?
...sers, the handle is guaranteed to be a number that isn't equal to 0; therefore, 0 makes a handy flag value for "no timer set". (Other platforms may return other values; NodeJS's timer functions return an object, for instance.)
To schedule a function to only fire once, use setTimeout instead. It won...
Adding attribute in jQuery
...butes using attr like so:
$('#someid').attr('name', 'value');
However, for DOM properties like checked, disabled and readonly, the proper way to do this (as of JQuery 1.6) is to use prop.
$('#someid').prop('disabled', true);
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How can I generate random number in specific range in Android? [duplicate]
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it won't work for negative numbers
– Kirill Kulakov
Jun 7 '13 at 21:21
6
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keycode 13 is for which key
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It's the Return or Enter key on keyboard.
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How to remove a key from HashMap while iterating over it? [duplicate]
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Try:
Iterator<Map.Entry<String,String>> iter = testMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String,String> entry = iter.next();
if("Sample".equalsIgnoreCase(entry.getValue())){
iter...
How to add not null constraint to existing column in MySQL
..... MODIFY... query and add NOT NULL into your existing column definition. For example:
ALTER TABLE Person MODIFY P_Id INT(11) NOT NULL;
A word of caution: you need to specify the full column definition again when using a MODIFY query. If your column has, for example, a DEFAULT value, or a column ...