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Removing fields from struct or hiding them in JSON Response
...hat, upon being called, performs a query, creates an instance of a struct, and then encodes that struct as JSON before sending back to the caller. I'd now like to allow the caller to be able to select the specific fields they would like returned by passing in a "fields" GET parameter.
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push_back vs emplace_back
I'm a bit confused regarding the difference between push_back and emplace_back .
7 Answers
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How is pattern matching in Scala implemented at the bytecode level?
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case Sum(l,r) // instance of check followed by fetching the two arguments and assigning to two variables l and r but see below about custom extractors
case "hello" // equality check
case _ : Foo // instance of check
case x => // assignment to a fresh variable
case _ => // do nothing, this is...
Using isKindOfClass with Swift
I'm trying to pick up a bit of Swift lang and I'm wondering how to convert the following Objective-C into Swift:
5 Answers
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How to convert .pfx file to keystore with private key?
I need 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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Why was the switch statement designed to need a break?
...instance, when compiling operators
that can have either one or two
operands:
switch (operator->num_of_operands) {
case 2: process_operand( operator->operand_2);
/* FALLTHRU */
case 1: process_operand( operator->operand_1);
break;
}
Case fall through is ...
How can you check which options vim was compiled with?
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When I run :version it shows +python/dyn and +python3/dyn. But echo has('python') returns 0. So, why is there a difference and which one should I go with?
– Durga Swaroop
Mar 25 '16 at 8:48
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JavaScript Date Object Comparison
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That is because in the second case, the actual date objects are compared, and two objects are never equal to each other. Coerce them to number:
alert( +startDate2 == +startDate3 ); // true
If you want a more explicity conversion to number, use either:
alert( startDate2.getTime() == startDate3.ge...
How can I merge properties of two JavaScript objects dynamically?
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ECMAScript 2018 Standard Method
You would use object spread:
let merged = {...obj1, ...obj2};
merged is now the union of obj1 and obj2. Properties in obj2 will overwrite those in obj1.
/** There's no limit to the number of objects you can...
How to set default value for form field in Symfony2?
...value. empty_data doesn't show the value, it uses it on empty value submit and makes it impossible to save unchecked choices.
– moldcraft
Jul 20 '17 at 9:04
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