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Swift: declare an empty dictionary
...
var emptyDictionary = [String: String]()
var populatedDictionary = ["key1": "value1", "key2": "value2"]
Note: if you are going to change the contents of the dictionary over time then declare it as a var (variable). You can declare an empty ...
What does `someObject.new` do in Java?
...thod(){
return new TestInner();
}
public static void main(String[] args) throws Exception{
Test t = new Test();
Test.TestInner ti = t.new TestInner();
}
}
Using javap we can view instructions generated for this code
Main method:
public static void main(java.l...
structure vs class in swift language
... everywhere that Bob was ever referenced.
class SomeClass {
var name: String
init(name: String) {
self.name = name
}
}
var aClass = SomeClass(name: "Bob")
var bClass = aClass // aClass and bClass now reference the same instance!
bClass.name = "Sue"
println(aClass.name) // "Sue...
Range references instead values
... code becomes:
package main
import "fmt"
type MyType struct {
field string
}
func main() {
var array [10]MyType
for idx, _ := range array {
array[idx].field = "foo"
}
for _, e := range array {
fmt.Println(e.field)
fmt.Println("--")
}
}
...
How to put the legend out of the plot
...d overlaps with the pie chart
The loc argument can take numbers instead of strings, which make calls shorter, however, they are not very intuitively mapped to each other. Here is the mapping for reference:
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Look up all descendants of a class in Ruby
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For extra safety one should write ObjectSpace.each_object(::Class) - this will keep the code working when you happen to have a YourModule::Class defined.
– Rene Saarsoo
Oct 3 '11 at 10:42
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Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...eDirect and MakePhoneCallDirect blocks that do the old behavior that needs extra permissions. We chose to have the existing SendMessage and MakePhoneCall blocks launch the default apps via Intents , as recommended by Google policy, which should work for most people.For receiving, we made it so that ...
pg_config executable not found
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I need the extra brew link postgresql
– vincentlcy
Mar 10 '16 at 8:56
1
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set gvim font in .vimrc file
...m the menu and then typing
:set guifont?
This should display to you the string that Vim has set this option to. You'll need to escape any spaces.
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improve this answer
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How to check if element exists using a lambda expression?
... }
return false;
}
public boolean containsTabById(TabPane tabPane, String id) {
return containsByLambda(tabPane.getTabs(), z -> z.getId().equals(id));
}
...
if (containsTabById(tabPane, idToCheck))) {
...
}
...