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Why does volatile exist?
...s useless (The guy never sets the value! He's nuts, get rid of that code!) and my code would proceed without having acquired the semaphore, causing problems later on.
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What is the most efficient way to store a list in the Django models?
...ed as a one-to-many foreign key relationship to a Friends table? I understand that myFriends are just strings but I would think that a better design would be to create a Friend model and have MyClass contain a foreign key realtionship to the resulting table.
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Activity has leaked window that was originally added
What is this error, and why does it happen?
40 Answers
40
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ActionBar text color
...ncoding="utf-8"?>
<resources>
<style name="MyTheme" parent="@android:style/Theme.Holo.Light">
<item name="android:actionBarStyle">@style/MyTheme.ActionBarStyle</item>
</style>
<style name="MyTheme.ActionBarStyle" parent="@android:style/Widget.Holo.Light...
RegEx to extract all matches from string using RegExp.exec
...s an array.
For example:
const str = 'All of us except @Emran, @Raju and @Noman was there';
console.log(
str.match(/@\w*/g)
);
// Will log ["@Emran", "@Raju", "@Noman"]
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Label on the left side instead above an input field
...s itself to width:100%. Needed to override that div to 50%. Then the label and input-group (datepicker) would fit in one line. (I wish it was cleaner without override though.)
– Turbo
Nov 15 '16 at 21:17
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What is lexical scope?
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I understand them through examples. :)
First, lexical scope (also called static scope), in C-like syntax:
void fun()
{
int x = 5;
void fun2()
{
printf("%d", x);
}
}
Every inner level can access its outer l...
Why do I get TypeError: can't multiply sequence by non-int of type 'float'?
...et a sale amount (by input) to be multiplied by a defined sales tax (0.08) and then have it print the total amount (sales tax times sale amount).
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Swift class introspection & generics
...ype is a declaration but MyObject.self is a factory method (can be called) and myObject is a variable containing a reference to a factory method. The call myObject() would produce an instance of class MyObject. It would be better example if the name of myObject variable was myObjectFactory?
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How to detect the physical connected state of a network cable/connector?
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grep "" eth0/* is so elegant and easy, thanks! :) With the -s switch grep will not complain about the directories.
– Ray
Apr 10 '15 at 10:17
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