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Find the files existing in one directory but not in the other [closed]
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390
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diff -r dir1 dir2 | grep dir1 | awk '{print $4}' > difference1.txt
Expla...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...cause it is private.
Edit: construct_finder_sql was removed in Rails 5.1.0.beta1.
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Advantages of Binary Search Trees over Hash Tables
...ry than they need to.
For instance, if a hash function has a range R(h) = 0...100, then you need to allocate an array of 100 (pointers-to) elements, even if you are just hashing 20 elements. If you were to use a binary search tree to store the same information, you would only allocate as much space...
What can I do to resolve a “Row not found or changed” Exception in LINQ to SQL on a SQL Server Compa
...ever could be NULL!
So, optimizing the query, LINQ
replaces it with "where 0 = 1", the
SQL equivalent of "never".
The same symptom will appear when the data types of a field does not match the data type in SQL, or if fields are missing, since LINQ will not be able to make sure the SQL data has not...
What is the difference between atan and atan2 in C++?
...13
nbro
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answered Nov 12 '08 at 9:22
Chris Jester-Y...
Circular list iterator in Python
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answered May 1 '14 at 21:00
Lukas GrafLukas Graf
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Is there a way to perform “if” in python's lambda
...
The syntax you're looking for:
lambda x: True if x % 2 == 0 else False
But you can't use print or raise in a lambda.
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What does this symbol mean in JavaScript?
...r parameter
Null-safe property access (and conditional assignment) in ES6/2015
Optional Chaining in JavaScript
Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?
Is there a "null coalescing" operator in JavaScript?
:: — Double colon: bind operator
JavaScri...
How do I select an entire row which has the largest ID in the table?
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edited Oct 22 '12 at 10:55
answered Sep 30 '11 at 0:49
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Google Maps JS API v3 - Simple Multiple Marker Example
...;/script>
</head>
<body>
<div id="map" style="width: 500px; height: 400px;"></div>
<script type="text/javascript">
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach'...