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How to pass a function as a parameter in Java? [duplicate]
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Java 8 and above
Using Java 8+ lambda expressions, if you have a class or interface with only a single abstract method (sometimes called a SAM type), for example:
public interface MyInterface {
String doSomething(int param1, String param2);
}
then anywhere where MyInterface is used, you c...
How to convert a string to utf-8 in Python
... Python 3
All strings are unicode. The unicode function does not exist anymore. See answer from @Noumenon
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Ternary operation in CoffeeScript
...se.
a = if true then 5 else 10
a = if false then 5 else 10
You can see more about expression examples here.
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SHA-1 fingerprint of keystore certificate
Is the method for getting a SHA-1 fingerprint the same as the method of getting the a fingerprint? Previously, I was running this command:
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Is there a way to make npm install (the command) to work behind proxy?
Read about a proxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing.
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Why does the expression 0 < 0 == 0 return False in Python?
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I believe Python has special case handling for sequences of relational operators to make range comparisons easy to express. It's much nicer to be able to say 0 < x <= 5 than to say (0 < x) and (x <= 5).
These are called chained comparisons. And that's a li...
Android: AutoCompleteTextView show suggestions when no text entered
...I want to show suggestions even if it has no text - but setThreshold(0) works exactly the same as setThreshold(1) - so the user has to enter at least 1 character to show the suggestions.
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private final static attribute vs private final attribute
...e's one independent version of the variable per instance of the class. So for example:
Test x = new Test();
Test y = new Test();
x.instanceVariable = 10;
y.instanceVariable = 20;
System.out.println(x.instanceVariable);
prints out 10: y.instanceVariable and x.instanceVariable are separate, because...
Annotating text on individual facet in ggplot2
... data.frame(mpg = 15,wt = 5,lab = "Text",
cyl = factor(8,levels = c("4","6","8")))
p + geom_text(data = ann_text,label = "Text")
It should work without specifying the factor variable completely, but will probably throw some warnings:
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How to get record created today by rails activerecord?
How should I write the conditional statement for when I want to get all the records which were created today?
10 Answers
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