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Use dynamic variable names in JavaScript
In PHP you can do amazing/horrendous things like this:
17 Answers
17
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Convert JavaScript string in dot notation into an object reference
...n elegant one-liner that's 10x shorter than the other solutions:
function index(obj,i) {return obj[i]}
'a.b.etc'.split('.').reduce(index, obj)
[edit] Or in ECMAScript 6:
'a.b.etc'.split('.').reduce((o,i)=>o[i], obj)
(Not that I think eval always bad like others suggest it is (though it usua...
How to sort a list of lists by a specific index of the inner list?
...his answer is very important. I think people trying to sort by inner array indexes will fall here but people looking to sort by MULTIPLE inner array indexes will start here and your answer helped me see that itemgetter will actually do that for you!
– ZekeDroid
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How to create index on JSON field in Postgres?
In PostgreSQL 9.3 Beta 2 (?), how do I create an index on a JSON field? I tried it using the -> operator used for hstore but got the following error:
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gcc makefile error: “No rule to make target …”
...f. Lets consider an example.
My folder contents is:
$ ls -1
another_file
index.md
makefile
Whereas my makefile looks like
all: index.html
%.html: %.md wrong_path_to_another_file
@echo $@ $<
Although I do have index.md where it should be and there is no mistake in the name of it, the m...
Find row where values for column is maximal in a pandas DataFrame
...ndices labels, not integers.
Example': if you have string values as your index labels, like rows 'a' through 'e', you might want to know that the max occurs in row 4 (not row 'd').
if you want the integer position of that label within the Index you have to get it manually (which can be tricky now ...
Specifying column name in a “references” migration
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Don't I have to add any index?
– caarlos0
Dec 4 '12 at 1:33
1
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Modifying a subset of rows in a pandas dataframe
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Use .loc for label based indexing:
df.loc[df.A==0, 'B'] = np.nan
The df.A==0 expression creates a boolean series that indexes the rows, 'B' selects the column. You can also use this to transform a subset of a column, e.g.:
df.loc[df.A==0, 'B'] = ...
Configure nginx with multiple locations with different root folders on subdomain
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You need to use the alias directive for location /static:
server {
index index.html;
server_name test.example.com;
root /web/test.example.com/www;
location /static/ {
alias /web/test.example.com/static/;
}
}
The nginx wiki explains the difference between root and alias bette...
Rails 3 migrations: Adding reference column?
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remember to add the index with user:integer:index
– rickypai
Dec 1 '12 at 17:40
3
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