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How can I delete a newline if it is the last character in a file?
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You can do this with head from GNU coreutils, it supports arguments that are relative to the end of the file. So to leave off the last byte use:
head -c -1
To test for an ending newline you can use tail and wc. The following example saves the resul...
Add padding on view programmatically
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Where is the 0.5f coming from?
– Herr von Wurst
Sep 26 '13 at 22:35
12
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django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
... In order fix this problem do following steps:
Download MySql for Python from here
Untar downloaded file. In terminal window do following: tar xvfz downloade.tar.
cd /to untared directory
Run sudo python setup.py install
If you get error something like this: "Environment Error: /usr/local/bin/mysq...
How to check if a path is absolute path or relative path in cross platform way with Python?
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From python 3.4 pathlib is available.
In [1]: from pathlib import Path
In [2]: Path('..').is_absolute()
Out[2]: False
In [3]: Path('C:/').is_absolute()
Out[3]: True
In [4]: Path('..').resolve()
Out[4]: WindowsPath('C:/the...
Convert date to another timezone in JavaScript
...it were in the local time zone. Don't do that. Just use the string output from the first toLocalString call.
– Matt Johnson-Pint
Apr 24 '19 at 22:45
4
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Getting SyntaxError for print with keyword argument end=' '
...2.4), you can use the __future__ module to enable it in your script file:
from __future__ import print_function
The same goes with unicode_literals and some other nice things (with_statement, for example). This won't work in really old versions (i.e. created before the feature was introduced) of ...
Determine whether JSON is a JSONObject or JSONArray
I am going to receive either a JSON Object or Array from server, but I have no idea which it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
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How to make completely transparent navigation bar in iOS 7
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From this answer
[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [UIImage new];
self.na...
Reorder levels of a factor without changing order of values
... for manipulating factors and I'm finding it outrageously useful. Examples from the OP's data frame:
levels(df$letters)
# [1] "a" "b" "c" "d"
To reverse levels:
library(forcats)
fct_rev(df$letters) %>% levels
# [1] "d" "c" "b" "a"
To add more levels:
fct_expand(df$letters, "e") %>% leve...
How to check if UILabel is truncated?
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from the doc : textRectForBounds:limitedToNumberOfLines: "You should not call this method directly"...
– Martin
Nov 7 '12 at 15:25
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