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git diff between two different files
...tterns that are supported for two files is git diff [<options>] --no-index [--] <path> <path>. git diff a b only matches commit patterns, not files.
– Doug
Jul 8 at 5:34
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How do you track record relations in NoSQL?
I am trying to figure out the equivalent of foreign keys and indexes in NoSQL KVP or Document databases. Since there are no pivotal tables (to add keys marking a relation between two objects) I am really stumped as to how you would be able to retrieve data in a way that would be useful for normal we...
Oracle PL/SQL - How to create a simple array variable?
...xtend(); -- Extend it
array(i) := 'x';
end loop;
end;
The first index is 1 not 0.
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Where can I find documentation on formatting a date in JavaScript?
...t, show only the date.
http://www.ecma-international.org/ecma-262/7.0/index.html#sec-date.prototype.todatestring
new Date().toDateString(); // e.g. "Fri Nov 11 2016"
toISOString: Show ISO 8601 date and time.
http://www.ecma-international.org/ecma-262/7.0/index.html#sec-date.protot...
1114 (HY000): The table is full
... 1114 (HY000): The table '#sql-310a_8867d7f' is full
if you try to add an index to a table that is using the storage engine MEMORY.
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Dump a NumPy array into a csv file
...Frame(np_array).to_csv("path/to/file.csv")
if you don't want a header or index, use to_csv("/path/to/file.csv", header=None, index=None)
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What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...vely worse and worse.
There are also different colour depths (palettes): Indexed color and Direct color.
Indexed means that the image can only store a limited number of colours (usually 256), controlled by the author, in something called a Color Map
Direct means that you can store many thousand...
Create dynamic URLs in Flask with url_for()
...f the route','parameters (if required)')
It can be used as:
@app.route('/index')
@app.route('/')
def index():
return 'you are in the index page'
Now if you have a link the index page:you can use this:
<a href={{ url_for('index') }}>Index</a>
You can do a lot o stuff with it, f...
Why is SELECT * considered harmful?
...st and weren't needed when the original consumers coded their data access.
Indexing issues. Consider a scenario where you want to tune a query to a high level of performance. If you were to use *, and it returned more columns than you actually needed, the server would often have to perform more ex...
How to remove single character from a String
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One possibility:
String result = str.substring(0, index) + str.substring(index+1);
Note that the result is a new String (as well as two intermediate String objects), because Strings in Java are immutable.
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