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Removing fields from struct or hiding them in JSON Response
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EDIT: I noticed a few downvotes and took another look at this Q&A. Most people seem to miss that the OP asked for fields to be dynamically selected based on the caller-provided list of fields. You can't do this with the sta...
Best approach to converting Boolean object to string in java
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While, String.valueOf() method as the source code shows, does the explicit null check:
public static String valueOf(Object obj) {
return (obj == null) ? "null" : obj.toString();
}
Just test this code:
Boolean b = null;
System.out.println(String.valueOf(b)); // Prints null
System.out.p...
Go Unpacking Array As Arguments
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Either your function is varargs, in which you can use a slice with the ... notation as Hunter McMillen shows, or your function has a fixed number of arguments and you can unpack them when writing your code.
If you really want...
Get Slightly Lighter and Darker Color from UIColor
...mp;r green:&g blue:&b alpha:&a])
return [UIColor colorWithRed:MIN(r + 0.2, 1.0)
green:MIN(g + 0.2, 1.0)
blue:MIN(b + 0.2, 1.0)
alpha:a];
return nil;
}
- (UIColor *)darkerColorForCol...
structure vs class in swift language
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Here's an example with a class. Note how when the name is changed, the instance referenced by both variables is updated. Bob is now Sue, everywhere that Bob was ever referenced.
class SomeClass {
var name: String
init(name: String) {
...
PyPy — How can it possibly beat CPython?
...w is this possible?
Manual memory management (which is what CPython does with its counting) can be slower than automatic management in some cases.
Limitations in the implementation of the CPython interpreter preclude certain optimisations that PyPy can do (eg. fine grained locks).
As Marcelo men...
Which is the preferred way to concatenate a string in Python?
...appending a string to a string variable is to use + or +=. This is because it's readable and fast. They are also just as fast, which one you choose is a matter of taste, the latter one is the most common. Here are timings with the timeit module:
a = a + b:
0.11338996887207031
a += b:
0.110404968261...
How to modify Github pull request？
...e opened a pull request to a project. The maintainer has decided to accept it, but told me to modify some contents.
4 Answ...
How to sort a Ruby Hash by number value?
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No idea how you got your results, since it would not sort by string value... You should reverse a1 and a2 in your example
Best way in any case (as per Mladen) is:
metrics = {"sitea.com" => 745, "siteb.com" => 9, "sitec.com" => 10 }
metrics.sort_by {|_key...
How to convert .pfx file to keystore with private key?
...ed to sign Android application ( .apk ).
I have .pfx file. I converted it to .cer file via Internet Explorer and then converted .cer to .keystore using keytool. Then I've tried to sign .apk with jarsigner but it says that .keystore doesn't content a private key.
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