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PHP: How to use array_filter() to filter array keys?
...ainst the key, e.g. $allowed could contain regex patterns instead of plain strings.
You can also use ARRAY_FILTER_USE_BOTH to have both the value and the key passed to your filter function. Here's a contrived example based upon the first, but note that I'd not recommend encoding filtering rules usi...
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("--")
}
}
...
HTML text input allow only numeric input
...n of this.
function setInputFilter(textbox: Element, inputFilter: (value: string) => boolean): void {
["input", "keydown", "keyup", "mousedown", "mouseup", "select", "contextmenu", "drop"].forEach(function(event) {
textbox.addEventListener(event, function(this: (HTMLInputElement | HT...
Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...uld be another reason for this error. The attribute
android:taskAffinity="string"
Should always start with a dot, like:
android:taskAffinity=".string"
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What to gitignore from the .idea folder?
...rashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties
fabric.properties
### Intellij Patch ###
# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
# *.iml
# modules.xml
...
C# naming convention for constants?
...++ Standard Tempate Library has adopted lower case for constants e.g. std::string::npos (cplusplus.com/reference/string/string/npos). So ALL_CAPS is only for macros and preprocessor directives- which makes it look even more stupider in C#.
– Richard Dingwall
No...
How to compare two Dates without the time portion?
...
I don't think that would work, even if converting to Strings was a good idea. The == operator doesn't necessarily return true for equivalent Strings (use equals()). You certainly can't use the other comparison operators you mentioned, either.
– harto
...
Why do we need virtual functions in C++?
... virtual modifier on/off to see what happens
//virtual
std::string Says() { return "?"; }
};
class Dog: public Animal
{
public: std::string Says() { return "Woof"; }
};
void test()
{
Dog* d = new Dog();
Animal* a = d; // refer to Dog instance with Animal pointer
...
Set time to 00:00:00
... new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void main(String[] args)
{
Calendar now = Calendar.getInstance();
now.set(Calendar.HOUR, 0);
now.set(Calendar.MINUTE, 0);
now.set(Calendar.SECOND, 0);
System.out.println(sdf.format(now.getTim...
Python != operation vs “is not”
... but are not identical. (They are not the same object in memory.)
Example: Strings
>>> greeting = "It's a beautiful day in the neighbourhood."
>>> a = unicode(greeting)
>>> b = unicode(greeting)
>>> a is b
False
>>> a == b
True
Note: I use unicode stri...