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vagrant up failed, /dev/vboxnetctl: no such file or directory
...for me:
Grant permission to VirtualBox under System Preferences > Security & Privacy > General (this request is new to macOS High Sierra)
Open Terminal and run: sudo "/Library/Application Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh" restart
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How to empty a list?
It seems so "dirty" emptying a list in this way:
7 Answers
7
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How do I create a WPF Rounded Corner container?
...to have a WPF Rounded Corner container to place a bunch of other elements within. Does anyone have some suggestions or sample code on how we can best accomplish this? Either with styles on a or with creating a custom control?
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Validate that end date is greater than start date with jQuery
...ions answer. this extension method works using the jQuery validate plugin. It will validate dates and numbers
jQuery.validator.addMethod("greaterThan",
function(value, element, params) {
if (!/Invalid|NaN/.test(new Date(value))) {
return new Date(value) > new Date($(params).val());...
Manipulate a url string by adding GET parameters
...to add GET parameters to URLs that may and may not contain GET parameters without repeating ? or & .
15 Answers
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Java Serializable Object to Byte Array
...utStream out = null;
try {
out = new ObjectOutputStream(bos);
out.writeObject(yourObject);
out.flush();
byte[] yourBytes = bos.toByteArray();
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} finally {
try {
bos.close();
} catch (IOException ex) {
// ignore close exception
}
}
Create an object from a byte array:
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How to rollback a specific migration?
...f the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back.
For example:
rake db:rollback STEP=5
Will also rollback all the migration that happened later (4, 3, 2 and also 1).
To roll back all migrations back to (and includ...
Get Enum from Description attribute [duplicate]
...follow
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edited Sep 16 at 8:23
Neo
2,70544 gold badges3131 silver badges5656 bronze badges
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Is it possible to set the equivalent of a src attribute of an img tag in CSS?
Is it possible to set the src attribute value in CSS? At present, what I am doing is:
25 Answers
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How do I compare two hashes?
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You can compare hashes directly for equality:
hash1 = {'a' => 1, 'b' => 2}
hash2 = {'a' => 1, 'b' => 2}
hash3 = {'a' => 1, 'b' => 2, 'c' => 3}
hash1 == hash2 # => true
hash1 == hash3 # => false
hash1.to_a == hash2.to_a # => true
hash...