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Identify user in a Bash script called by sudo
...ad of the command whoami use who am i. This runs the who command filtered for the current session. It gives you more info than you need. So, do this to get just the user:
who am i | awk '{print $1}'
Alternatively (and simpler) you can use logname. It does the same thing as the above statemen...
What's the best way to communicate between view controllers?
...te (per the MVC design pattern). Usually you want to avoid putting state information inside a controller, unless it's strictly "presentation" data.
Second, see page 10 of the Stanford presentation for an example of how to programmatically push a controller onto the navigation controller. For an exa...
Get contentEditable caret index position
... var tempEl = document.createElement("span");
editableDiv.insertBefore(tempEl, editableDiv.firstChild);
var tempRange = range.duplicate();
tempRange.moveToElementText(tempEl);
tempRange.setEndPoint("EndToEnd", range);
caretPos = tempRange.text.length;
}
}...
Unknown column in 'field list' error on MySQL Update query
I keep getting MySQL error #1054, when trying to perform this update query:
11 Answers
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setBackground vs setBackgroundDrawable (Android)
I want to set background drawable of a view. There are two methods for this (as far as I see): setBackground and setBackgroundDrawable .
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Convert JSON string to dict using Python
...e bit confused with JSON in Python.
To me, it seems like a dictionary, and for that reason
I'm trying to do that:
4 Answers...
PostgreSQL create table if not exists
... Postgres 9.1:
CREATE TABLE IF NOT EXISTS myschema.mytable (i integer);
For older versions, here is a function to work around it:
CREATE OR REPLACE FUNCTION create_mytable()
RETURNS void
LANGUAGE plpgsql AS
$func$
BEGIN
IF EXISTS (SELECT FROM pg_catalog.pg_tables
WHERE sche...
What's the difference between ES6 Map and WeakMap?
...the only difference between Maps and WeakMaps is a missing "size" property for WeakMaps. But is this true? What's the difference between them?
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How to get a string after a specific substring?
... need to split a text with the 'low' word and it contains the word lower before it, this will not work!
– Leonardo Hermoso
Jan 12 '17 at 3:48
1
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Post data to JsonP
...
You can, of course, make a page on another domain the action of a regular form POST.
Edit: There are some interesting hacks out there if you're willing to go to a lot of effort inserting hidden <iframe>s and mucking about with their properties.
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