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move_uploaded_file gives “failed to open stream: Permission denied” error
...g this error when trying to configure the upload directory with Apache 2.2 and PHP 5.3 on CentOS.
13 Answers
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Joining three tables using MySQL
...t", c.name "Course"
from student s, bridge b, course c
where b.sid = s.sid and b.cid = c.cid
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How to list all methods for an object in Ruby?
...ons", "table_name_prefix", ...
Note that methods is a method for Classes and for Class instances.
Here's the methods that my User class has that are not in the ActiveRecord base class:
>> User.methods - ActiveRecord::Base.methods
=> ["field_types", "su_pw?", "set_login_attr", "create_u...
How to save password when using Subversion from the console
... no. Change it to yes (or just comment it out because it defaults to yes), and the next time you give Subversion your password it should save it.
You might want to ensure that the owner and permissions of ~/.subversion/config are correct (no public or group access; 600).
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Java: convert List to a String
...; list = Arrays.asList("foo", "bar", "baz");
String joined = String.join(" and ", list); // "foo and bar and baz"
If you have a Collection with another type than String you can use the Stream API with the joining Collector:
List<Person> list = Arrays.asList(
new Person("John", "Smith"),
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How do I “Add Existing Item” an entire directory structure in Visual Studio?
I have a free standing set of files not affiliated with any C# project at all that reside in a complicated nested directory structure.
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Multiplication on command line terminal
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For more advanced and precise math consider using bc(1).
echo "3 * 2.19" | bc -l
6.57
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Normal arguments vs. keyword arguments
...tion them after all of the arguments without names (positional arguments), and there must be default values for any parameters which were not mentioned at all.
The other concept is on the function definition side: you can define a function that takes parameters by name -- and you don't even have to...
How to extract one column of a csv file
...ou are a lucky guy using GNU Tools in Windows, you can execute the same comand as @IgorMikushkin as follows: gawk -F"|" "{print $13}" files*.csv
– Elidio Marquina
May 25 '17 at 18:33
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Can someone give an example of cosine similarity, in a very simple, graphical way?
... want to know how similar these texts are, purely in terms of word counts (and ignoring word order). We begin by making a list of the words from both texts:
me Julie loves Linda than more likes Jane
Now we count the number of times each of these words appears in each text:
me 2 2
Jane ...