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How do I find all files containing specific text on Linux?
I'm trying to find a way to scan my entire Linux system for all files containing a specific string of text. Just to clarify, I'm looking for text within the file, not in the file name.
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How to change a nullable column to not nullable in a Rails migration?
I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
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Nested fragments disappear during transition animation
...moved(probably as a user action as well).
I've made a little example with setting up the background image(something basic).
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How to store date/time and timestamps in UTC time zone with JPA and Hibernate
...halcea if it's for Mysql, one need to tell MySql to use timezone by using useTimezone=true in the connection string. Then only setting property hibernate.jdbc.time_zone will work
– TheCoder
Oct 13 '18 at 19:08
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Can I use the range operator with if statement in Swift?
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Merging dictionaries in C#
What's the best way to merge 2 or more dictionaries ( Dictionary<T1,T2> ) in C#?
(3.0 features like LINQ are fine).
2...
What does jquery $ actually return?
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From Rick Strahl's description:
The jQuery Object: The Wrapped Set:
Selectors return a jQuery object known
as the "wrapped set," which is an
array-like structure that contains all
the selected DOM elements. You can
iterate over the wrapped set like an
array or access individu...
How to find whether or not a variable is empty in Bash
...fic situation not directly mentioned in the question: if the variable is unset and the set -u option has been activated, this test will fail with unbound variable. In this case, you might prefer @alexli's solution.
– anol
May 26 '15 at 16:34
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How do I declare an array of weak references in Swift?
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It's kind of late for party, but try mine. I implemented as a Set not an Array.
WeakObjectSet
class WeakObject<T: AnyObject>: Equatable, Hashable {
weak var object: T?
init(object: T) {
self.object = object
}
var hashValue: Int {
if let object = ...
Simplest way to profile a PHP script
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The PECL APD extension is used as follows:
<?php
apd_set_pprof_trace();
//rest of the script
?>
After, parse the generated file using pprofp.
Example output:
Trace for /home/dan/testapd.php
Total Elapsed Time = 0.00
Total System Time = 0.00
Total User Time = 0.00
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