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How can I determine if a String is non-null and not only whitespace in Groovy?
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tim_yatestim_yates
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How to define @Value as optional
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answered Jul 8 '16 at 16:05
Andy BrownAndy Brown
7,73022 gold badges2828 silver badges4242 bronze badges
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How can I add new array elements at the beginning of an array in Javascript?
... not already an array:
const array = [ 3, 2, 1 ]
const newLastElement = 0
// Both of these lines are equivalent:
const newArray1 = array.concat(newLastElement) // [ 3, 2, 1, 0 ]
const newArray2 = array.concat([newLastElement]) // [ 3, 2, 1, 0 ]
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jQuery selectors on custom data attributes using HTML5
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$("ul[data-group='Companies'] li[data-company='Microsoft']") //Get all elements with data-comp...
Rails: Check output of path helper from console
..., you can call app.post_path. This will work in Rails ~= 2.3 and >= 3.1.0.
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What does enumerate() mean?
...gt; for count, elem in enumerate(elements):
... print count, elem
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0 foo
1 bar
2 baz
By default, enumerate() starts counting at 0 but if you give it a second integer argument, it'll start from that number instead:
>>> for count, elem in enumerate(elements, 42):
... print coun...
Simple insecure two-way data “obfuscation”?
...Me__({ 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 });
// a hardcoded IV should not be used for production AES-CBC code
// IVs should be unpredictable per ciphertext
private byte[] Vector...
How to export plots from matplotlib with transparent background?
...e keyword argument transparent=True to save the image as a png file.
In [30]: x = np.linspace(0,6,31)
In [31]: y = np.exp(-0.5*x) * np.sin(x)
In [32]: plot(x, y, 'bo-')
Out[32]: [<matplotlib.lines.Line2D at 0x3f29750>]
In [33]: savefig('demo.png', transparent=True)
Result:
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Display current date and time without punctuation
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edited May 15 '18 at 10:13
answered Dec 12 '13 at 18:41
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How do you split a list into evenly sized chunks?
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