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Python-equivalent of short-form “if” in C++ [duplicate]
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This ternary operator was introduced in Python 2.5.
– Dave Webb
Nov 6 '09 at 9:19
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What are the differences between NP, NP-Complete and NP-Hard?
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I assume that you are looking for intuitive definitions, since the technical definitions require quite some time to understand. First of all, let's remember a preliminary needed concept to understand those definitions.
Decision problem: A problem with a ...
Node.js check if path is file or directory
...llowing should tell you. From the docs:
fs.lstatSync(path_string).isDirectory()
Objects returned from fs.stat() and fs.lstat() are of this type.
stats.isFile()
stats.isDirectory()
stats.isBlockDevice()
stats.isCharacterDevice()
stats.isSymbolicLink() (only valid with fs.lstat())
stats.isFIFO()
s...
Difference between Node object and Element object?
...t.getElementsByClassName()
returns NodeList object(Collection of Elements or Nodes?)
5 Answers
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How to take the first N items from a generator or list in Python? [duplicate]
...e all valid: array[start:], array[:stop], array[::step]
Slicing a generator
import itertools
top5 = itertools.islice(my_list, 5) # grab the first five elements
You can't slice a generator directly in Python. itertools.islice() will wrap an object in a new slicing generator using the syntax i...
How to show line number when executing bash script
...ich has a lot of commands and will generate lots of output, I use set -x or set -v and set -e , so the script would stop when error occurs. However, it's still rather difficult for me to locate which line did the execution stop in order to locate the problem.
Is there a method which can output ...
Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
One of the tips for jslint tool is:
16 Answers
16
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Renaming columns in pandas
...ataFrame using pandas and column labels that I need to edit to replace the original column labels.
27 Answers
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Prevent wrapping of span or div
...ut a group of div elements of fixed width into a container and have the horizontal scroll bar appeared. The div / span elements should appear in a line, left to right in the order they appear in the HTML (essentially unwrapped).
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Persistence unit as RESOURCE_LOCAL or JTA?
...ions have the choice of managing transactions themselves (RESOURCE_LOCAL), or having them managed by the application server's JTA implementation.
In most cases, RESOURCE_LOCAL is fine. This would use basic JDBC-level transactions. The downside is that the transaction is local to the JPA persistence...