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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
...ifully in a lot of scenarios, can only initialize a map if the keys are valid Python identifiers.
This works:
a = {'import': 'trade', 1: 7.8}
a = dict({'import': 'trade', 1: 7.8})
This won't work:
a = dict(import='trade', 1=7.8)
>> SyntaxError: invalid syntax ^
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How to say “should_receive” more times in RSpec
...).to have_received(:find).exactly(n).times etc.
– David Tuite
Sep 10 '14 at 22:25
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OSGi: What are the differences between Apache Felix and Apache Karaf?
...af's author) from here:
Felix is just the OSGi core runtime. Karaf provides a "distribution" based on Felix by adding other features such as a console, an SSH remoting mechanism, a file deployer and more.
In this diagram of the Karaf architecture, Felix (or other OSGi implementation - currentl...
Including another class in SCSS
... see here for some fun facts about @extend - there's some tricky side effects you should be aware of: stackoverflow.com/questions/30744625/…
– Toni Leigh
Sep 23 '15 at 7:53
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How do I create a class instance from a string name in ruby?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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wkhtmltopdf: cannot connect to X server
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I tried that tutorial originally, and it didn't quite work, also I didn't like having to create the wrapper with symbolic link. Like I wrote in my answer, if you just move the static executable to the /usr/bin/ directory you can use it from anywhere. They added a v...
Why does Math.floor return a double?
...nteger as a double is the right thing to do here because it offers a much wider usefull number-range than a integer could.
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How do I modify a MySQL column to allow NULL?
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This did not work for me! The column did not change. Maybe because I had a constraint to another table where the column was used (when not null).
– Rocologo
Dec 18 '16 at 10:09
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Why does parseInt yield NaN with Array#map?
...10, in this case). Base 1 is an impossible number base, and 3 is not a valid number in base 2:
parseInt('1', 0); // OK - gives 1
parseInt('2', 1); // FAIL - 1 isn't a legal radix
parseInt('3', 2); // FAIL - 3 isn't legal in base 2
So in this case, you need the wrapper function:
['1','2','3'].m...
Does Ruby have a string.startswith(“abc”) built in method?
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Matz has said he prefers without the s as it then looks like second person singular or third person plural.
– Andrew Grimm
Nov 10 '10 at 22:58
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