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Replace comma with newline in sed on MacOS?
...lash less i.e. echo "a,b" | sed -e $'s/,/\\n/g.
– Alexandre Holden Daly
Jul 2 '14 at 19:08
2
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What reason is there to use null instead of undefined in JavaScript?
...ou might sometimes get an object while undefined means that no object was expected (or that there was an error). My problem with that is its completely arbitrary, and totally unnecessary.
That said, there is one major difference - variables that aren't initialized (including function parameters wh...
What is uint_fast32_t and why should it be used instead of the regular int and uint32_t?
...may not be sufficient for your application.
uint32_t is not guaranteed to exist. It's an optional typedef that the implementation must provide iff it has an unsigned integer type of exactly 32-bits. Some have a 9-bit bytes for example, so they don't have a uint32_t.
uint_fast32_t states your intent ...
What is null in Java?
...s an instanceof.
15.20.2 Type Comparison Operator instanceof
RelationalExpression:
RelationalExpression instanceof ReferenceType
At run time, the result of the instanceof operator is true if the value of the RelationalExpression is not null and the reference could be cast to the Referen...
Is nested function a good approach when required by only one function? [closed]
...
>>> def sum(x, y):
... def do_it():
... return x + y
... return do_it
...
>>> a = sum(1, 3)
>>> a
<function do_it at 0xb772b304>
>>> a()
4
Is this what you were looking for? It's ca...
How to debug JavaScript / jQuery event bindings with Firebug or similar tools?
I need to debug a web application that uses jQuery to do some fairly complex and messy DOM manipulation. At one point, some of the events that were bound to particular elements, are not fired and simply stop working.
...
How can I configure Logback to log different levels for a logger to different destinations?
...warn and error messages to stderr, and everything else to stdout.
logback.xml
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<target>System.out</target>
<filter class="com.foo.StdOutFilter" />
...
</appender>
<appender name="stderr" cl...
Add a property to a JavaScript object using a variable as the name?
...
You can use this equivalent syntax:
obj[name] = value
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Skip first entry in for loop in python?
...uence.
For any iterable, to skip the first item:
itercars = iter(cars)
next(itercars)
for car in itercars:
# do work
If you want to skip the last, you could do:
itercars = iter(cars)
# add 'next(itercars)' here if you also want to skip the first
prev = next(itercars)
for car in itercars:
...
Order data frame rows according to vector with specific order
...ered according to a "target" vector as the one I implemented in the short example below?
5 Answers
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