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Determine if variable is defined in Python [duplicate]
...d precautions against those who nevertheless do. Maintaining fragile, undertested legacy code with somewhat-broken design that you inherited from somebody else is a fact of life, and those who can only think of big-bang rewriting from scratch rather than cautiously and incrementally need to re-read ...
Event on a disabled input
...nput (+ script) should be
<input type="text" readonly="readonly" name="test" value="test" />
$('input[readonly]').click(function () {
$(this).removeAttr('readonly');
})
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Prefer composition over inheritance?
.... So the goose is more or less cooked once you derive from TypeA.
My acid test for the above is:
Does TypeB want to expose the complete interface (all public methods no less) of TypeA such that TypeB can be used where TypeA is expected? Indicates Inheritance.
e.g. A Cessna biplane will expos...
Write to file, but overwrite it if it exists
... @Griddo my shell is bash version 4.3.48(1)-release. echo "aaa" &>| test.txt results in error -bash: syntax error near unexpected token |. My noclobber is set On.
– Tu Bui
May 17 '19 at 17:46
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Checking whether a variable is an integer or not [duplicate]
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Your sympy.Rational test doesn't quite do what you're thinking, because sympy.Rational(5) evaluates to an instance of sympy.Integer. Any operation that would produce a Rational with an integer value instead produces an Integer.
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Is there a way to list pip dependencies/requirements?
... perusing multiple comments so I am providing an updated answer.
This was tested with pip versions 8.1.2, 9.0.1, 10.0.1, and 18.1.
To get the output without cluttering your current directory on Linux use
pip download [package] -d /tmp --no-binary :all: -v
-d tells pip the directory that downloa...
How does Facebook Sharer select Images and other metadata when sharing my URL?
...l url
~~> Will scrape the page provided in the url value
~~> You can test test the values here: https://developers.facebook.com/tools/debug
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Can Maven be made less verbose?
...ur logger settings. For example, if you're using logback, including a src/test/resources/logback-test.xml file in your project will let you customize your logging level to 'off' during the test phase. This will clean everything up.
– codeturner
May 9 '13 at 2...
Get selected value of a dropdown's item using jQuery
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the fastest way of getting the text of the selected option is: $("#dropDownId").children("option").filter(":selected").text()
– RickardN
Mar 21 '13 at 10:22
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How to get just the parent directory name of a specific file
How to get ddd from the path name where the test.java resides.
10 Answers
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