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Parse a .py file, read the AST, modify it, then write back the modified source code
...ou do do so.
eg.
import ast
import codegen
expr="""
def foo():
print("hello world")
"""
p=ast.parse(expr)
p.body[0].body = [ ast.parse("return 42").body[0] ] # Replace function body with "return 42"
print(codegen.to_source(p))
This will print:
def foo():
return 42
Note that you may l...
How can a string be initialized using “ ”?
...ned to be in between a primitive and a class.
For example
String s1 = "Hello"; // String literal
String s2 = "Hello"; // String literal
String s3 = s1; // same reference
String s4 = new String("Hello"); // String object
String s5 = new String("Hello")...
jQuery empty() vs remove()
...emove()
.empty()
before:
<div class="container">
<div class="hello">Hello</div>
<div class="goodbye">Goodbye</div>
</div>
.remove():
$('.hello').remove();
after:
<div class="container">
<div class="goodbye">Goodbye</div>
</div&g...
How to echo shell commands as they are executed
...h
# Function to display commands
exe() { echo "\$ $@" ; "$@" ; }
exe echo hello world
Which outputs
$ echo hello world
hello world
For more complicated commands pipes, etc., you can use eval:
#!/bin/bash
# Function to display commands
exe() { echo "\$ ${@/eval/}" ; "$@" ; }
exe eval "echo 'H...
What does $$ (dollar dollar or double dollar) mean in PHP?
...
It's a variable's variable.
<?php
$a = 'hello';
$$a = 'world'; // now makes $hello a variable that holds 'world'
echo "$a ${$a}"; // "hello world"
echo "$a $hello"; // "hello world"
?>
...
innerText vs innerHTML vs label vs text vs textContent vs outerText
... e with HTML code <b>Lorem Ipsum</b>:
e.innerHTML = "<i>Hello</i> World!"; => <b><i>Hello</i> World!</b>
e.outerHTML = "<i>Hello</i> World!"; => <i>Hello</i> World!
e.innerText = "Hello World!"; => <b>H...
How do I replace a character at a particular index in JavaScript?
I have a string, let's say Hello world and I need to replace the char at index 3. How can I replace a char by specifying a index?
...
Compiling/Executing a C# Source File in Command Prompt
...
You can compile a C# program :
c: > csc Hello.cs
You can run the program
c: > Hello
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How can two strings be concatenated?
...an do two things:
concatenate values into one "string", e.g.
> paste("Hello", "world", sep=" ")
[1] "Hello world"
where the argument sep specifies the character(s) to be used between the arguments to concatenate,
or collapse character vectors
> x <- c("Hello", "World")
> x
[1] "Hell...
'str' object does not support item assignment in Python
...
I would like to write a program "Hello world" to "World Hello". So my code should search for space (' '). So I was looking for help
– Rasmi Ranjan Nayak
May 17 '12 at 7:26
...