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How to find a table having a specific column in postgresql
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I've used the query of @Roman Pekar as a base and added schema name (relevant in my case)
select n.nspname as schema ,c.relname
from pg_class as c
inner join pg_attribute as a on a.attrelid = c.oid
inner join pg_namespace as n on c.relnamespace = n.oid
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Encoding as Base64 in Java
I need to encode some data in the Base64 encoding in Java. How do I do that? What is the name of the class that provides a Base64 encoder?
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What is the difference between sigaction and signal?
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Excellent sigaction() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…; and excellent signal() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…. Notice that in the signal demo they avoid changing the handler...
Debugging WebSocket in Google Chrome
...e. Here are the steps to test it quickly:
Navigate to the WebSocket Echo demo, hosted on the websocket.org site.
Turn on the Chrome Developer Tools.
Click Network, and to filter the traffic shown by the Dev Tools, click WebSockets.
In the Echo demo, click Connect. On the Headers tab in Google Dev ...
How to find out if an installed Eclipse is 32 or 64 bit version?
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Go to the Eclipse base folder → open eclipse.ini → you will find the below line at line no 4:
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20150204-1316
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v201...
How to pass a function as a parameter in Java? [duplicate]
...s a simple example, where foo() is the function passed as a parameter, and demo() is the function that takes a function as a parameter. void demo(final Callable<Void> func){ func.call(); } void foo(){ return null; } demo(new Callable<Void>() {public Void call() {return foo...
What is the theoretical maximum number of open TCP connections that a modern Linux box can have
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What is the best way to trigger onchange event in react js
...pdating the input's state in response. The two-way binding utils more as a demo than anything else; they're included in addons only to emphasize the fact that pure two-way binding isn't appropriate for most applications and that you usually need more application logic to describe the interactions in...
Convert SVG image to PNG with PHP
...t involves a dynamically generated map of the US coloring different states based on a set of data.
8 Answers
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How do I encode and decode a base64 string?
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Encode
public static string Base64Encode(string plainText) {
var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
return System.Convert.ToBase64String(plainTextBytes);
}
Decode
public static string Base64Decode(string base64Encoded...