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Why use symbols as hash keys in Ruby?
...ring you mention throughout your source code in it's separate entity, e.g. if you have a string "name" multiple times mentioned in your source code, Ruby needs to store these all in separate String objects, because they might change later on (that's the nature of a Ruby string).
If you use a string...
What is the effect of encoding an image in base64?
If I convert an image (jpg or png) to base64, then will it be bigger, or will it have the same size? How much greater will it be?
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Removing an activity from the history stack
...ibute to "true" in the relevant <activity> entries in your AndroidManifest.xml file. For example:
<activity
android:name=".AnyActivity"
android:noHistory="true" />
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impr...
how to convert binary string to decimal?
...t function converts strings to numbers, and it takes a second argument specifying the base in which the string representation is:
var digit = parseInt(binary, 2);
See it in action.
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improv...
iOS White to Transparent Gradient Layer is Gray
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@RealNmae If you want to go from a colour to clear use UIColor.startColor and UIColor.startColor.withAlphaComponent(0.0) as your two colors.
– Conor
May 30 '18 at 19:36
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Virtualbox “port forward” from Guest to Host [closed]
...ication Host -> Guest
Connect to the Guest and find out the ip address:
ifconfig
example of result (ip address is 10.0.2.15):
eth0 Link encap:Ethernet HWaddr 08:00:27:AE:36:99
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
Go to Vbox instance window -> Menu -> ...
JavaScript property access: dot notation vs. brackets?
... just a string literal, is there any reason to use one over the other, and if so under which cases?
13 Answers
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IntelliJ: Never use wildcard imports
...ports?
Under 'Settings > Code Style > Imports', I can see that you can specify the 'class count' prior to IntelliJ using wildcard imports. However, if I never want to use wildcard imports can I turn this functionality off?
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iphone: Where the .dSYM file is located in crash report
According to this page here if you have proper application binary and .dSYM file then it is easy to symbolic them. But where are .dSYM and application binary files located?
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Find mouse position relative to element
...sing to understand what your browser sees as the parent. Here, you can specify which parent.
You take the mouse position, and then subtract it from the parent element's offset position.
var x = evt.pageX - $('#element').offset().left;
var y = evt.pageY - $('#element').offset().top;
If you're trying...