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psql: FATAL: database “” does not exist
...r, which I think is what you are looking for. If createdb fails, then you don't have enough rights to make your own database, and you will have to figure out how to fix the homebrew package.
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Modern way to filter STL container?
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@usr Its IMO syntactic sugar, a simple for loop does the job aswell (and often allows one to avoid copying).
– Sebastian Hoffmann
Jan 18 '14 at 15:47
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Progress indicator during pandas operations
...for pandas. Unlike the other answers, this will not noticeably slow pandas down -- here's an example for DataFrameGroupBy.progress_apply:
import pandas as pd
import numpy as np
from tqdm import tqdm
# from tqdm.auto import tqdm # for notebooks
df = pd.DataFrame(np.random.randint(0, int(1e8), (1000...
Alternative to iFrames with HTML5
...alternative to iFrames with HTML5.
I mean by that, be able to inject cross-domains HTML inside of a webpage without using an iFrame.
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File Upload without Form
...ry. The input tag is not inside any form tag. It stands individually. So I don't want to use jQuery plugins like 'ajaxForm' or 'ajaxSubmit'.
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Search All Fields In All Tables For A Specific Value (Oracle)
.../22/2008P09RR8' is a value selected directly from a single column? If you don't know at all where it is coming from, it could be a concatenation of several columns, or the result of some function, or a value sitting in a nested table object. So you might be on a wild goose chase trying to check ev...
smart pointers (boost) explained
What is the difference between the following set of pointers? When do you use each pointer in production code, if at all?
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Why can't strings be mutable in Java and .NET?
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@PRINCESSFLUFF This answer doesn't address strings specifically. That was the OPs question. It's so frustrating - this happens all the time on SO and with String immutability questions as well. The answer here talks about general benefits of immutabili...
How can I safely create a nested directory?
...com/questions/273192/#273208, will mask a failure to create the directory. Don't feel bad for voting down - you don't like the answer. It's what votes are for.
– Blair Conrad
Nov 7 '08 at 20:35
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Why does += behave unexpectedly on lists?
... # whereas only b1 was changed
For immutable types (where you don't have an __iadd__) a += b and a = a + b are equivalent. This is what lets you use += on immutable types, which might seem a strange design decision until you consider that otherwise you couldn't use += on immutable types...