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Remove blank attributes from an Object in Javascript
...n(obj) {
var propNames = Object.getOwnPropertyNames(obj);
for (var i = 0; i < propNames.length; i++) {
var propName = propNames[i];
if (obj[propName] === null || obj[propName] === undefined) {
delete obj[propName];
}
}
}
A few notes on null vs undefined:
test.test1 === ...
jQuery see if any or no checkboxes are selected
...e something like this
if ($("#formID input:checkbox:checked").length > 0)
{
// any one is checked
}
else
{
// none is checked
}
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foll...
Homebrew’s `git` not using completion
... |
edited Jan 31 '19 at 6:03
Corey Gouker
311 silver badge44 bronze badges
answered Feb 20 '13 at 1:47
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Efficiency of premature return in a function
...cking :)
– UncleZeiv
Oct 25 '11 at 10:15
@UncleZeiv: tested on clang too and same result
– Dani
...
Error handling in C code
...
answered Dec 22 '08 at 11:01
Nils PipenbrinckNils Pipenbrinck
74.6k2323 gold badges141141 silver badges213213 bronze badges
...
Android List Preferences: have summary as selected value?
...id:entryValues="@array/pref_list_entries_values"
android:defaultValue="0" />
Android will replace %s with the current string value of the preference, as displayed by the ListPreference's picker. The list's summary will also be set correctly when you enter the activity—you don't have to w...
Are negative array indexes allowed in C?
...
170
That is correct. From C99 §6.5.2.1/2:
The definition of the subscript
operator [] is th...
Find if variable is divisible by 2
.../ Will evaluate to true if the variable is divisible by 2
variable % 2 === 0
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How to convert numbers between hexadecimal and decimal
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edited Apr 15 '18 at 22:04
Legends
13.9k88 gold badges6666 silver badges103103 bronze badges
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Why should I declare a virtual destructor for an abstract class in C++?
...mory leak.
For example
class Interface
{
virtual void doSomething() = 0;
};
class Derived : public Interface
{
Derived();
~Derived()
{
// Do some important cleanup...
}
};
void myFunc(void)
{
Interface* p = new Derived();
// The behaviour of the next line is undefined...