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Understanding the ngRepeat 'track by' expression
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nilsKnilsK
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Difference between case object and object
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oos: java.io.ObjectOutputStream = java.io.ObjectOutputStream@e7da60
scala> oos.writeObject(B)
scala> oos.writeObject(A)
java.io.NotSerializableException: A$
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Run Cron job every N minutes plus offset
...desirable to use a step value in the minute field that divides evenly into 60.
So to offset the start time, specify the range explicitly and set the first value to the amount of the offset.
Examples
5-59/20 * * * * will run at 5 minutes after, 25 minutes after, and 45 minutes after.
10-59/25 * *...
Annotating text on individual facet in ggplot2
...e...this post nicely explains how to keep the strips: stackoverflow.com/a/56064130/3609450
– efrem
Jun 12 at 10:29
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How to go up a level in the src path of a URL in HTML?
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Here is all you need to know about relative file paths:
Starting with / returns to the root d...
How to compare software version number using js? (only number)
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// Return 1 if a > b
// Return -1 if a < b
// Return 0 if a == b
function compare(a, b) {...
When saving, how can you check if a field has changed?
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Since Django 1.8 released, you can use from_db classmethod to cache old value of remote_image. ...
Integrating Dropzone.js into existing HTML form with other fields
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Here's another way to do it: add a div in your form with a classname dropzone, and implement dr...
What does `node --harmony` do?
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it is worth mentioning that Harmony is the name used for the new ECMAscript. Harmony namespace contains features that are proposals for tha...
How to 'insert if not exists' in MySQL?
... I got a valid query when omitting FROM DUAL, but older versions (like 5.5.60) seem to require the FROM information. By using WHERE NOT EXISTS the intermediate query returns an empty result set if the innermost query found matching data.
The outer query
INSERT INTO `table` (`value1`, `value2`)
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