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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
...s are "pooled", and it returns the same instance for values smaller than 128.
From the java 1.6 source code, line 621:
public static Integer valueOf(int i) {
if(i >= -128 && i <= IntegerCache.high)
return IntegerCache.cache[i + 128];
else
return new Integer(i)...
How do you create optional arguments in php?
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answered Aug 29 '08 at 17:58
Jeff WinkworthJeff Winkworth
4,49466 gold badges3131 silver badges3333 bronze badges
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Given an RGB value, how do I create a tint (or shade)?
Given an RGB value, like 168, 0, 255 , how do I create tints (make it lighter) and shades (make it darker) of the color?
3...
Spring Data JPA find by embedded object property
... Eddie B
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answered Jun 27 '14 at 17:32
Oliver DrotbohmOliver Drotbohm
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Find column whose name contains a specific string
...as as pd
data = {'spike-2': [1,2,3], 'hey spke': [4,5,6], 'spiked-in': [7,8,9], 'no': [10,11,12]}
df = pd.DataFrame(data)
spike_cols = [col for col in df.columns if 'spike' in col]
print(list(df.columns))
print(spike_cols)
Output:
['hey spke', 'no', 'spike-2', 'spiked-in']
['spike-2', 'spiked-i...
Android customized button; changing text color
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585
Create a stateful color for your button, just like you did for background, for example:
<se...
How can I find all matches to a regular expression in Python?
...tching strings.
– rodorgas
Jun 12 '18 at 3:55
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show 2 more comments
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Unique constraint on multiple columns
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edited Dec 29 '16 at 18:22
Nielsvh
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answered Aug...
Query for array elements inside JSON type
... BrandstetterErwin Brandstetter
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