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How to do what head, tail, more, less, sed do in Powershell? [closed]
...txt | more # or less if you have it installed
gc log.txt | %{ $_ -replace '\d+', '($0)' } # sed
This works well enough for small files, larger ones (more than a few MiB) are probably a bit slow.
The PowerShell Community Extensions include some cmdlets for specialised file stuf...
Rename specific column(s) in pandas
...nditional expressions like:
df.columns = ['log(gdp)' if x=='gdp' else 'cap_mod' if x=='cap' else x for x in df.columns]
Or, construct a mapping using a dictionary and perform the list-comprehension with it's get operation by setting default value as the old name:
col_dict = {'gdp': 'log(gdp)', '...
Displaying better error message than “No JSON object could be decoded”
... also up on PYPI: https://pypi.python.org/pypi/rson/0.9 so you can use easy_install or pip to get it.
for the example given by tom:
>>> rson.loads('[1,2,]')
...
rson.base.tokenizer.RSONDecodeError: Unexpected trailing comma: line 1, column 6, text ']'
RSON is a designed to be a superset...
C++ convert hex string to signed integer
...>> x;
// output it as a signed type
std::cout << static_cast<int>(x) << std::endl;
}
In the new C++11 standard, there are a few new utility functions which you can make use of! specifically, there is a family of "string to number" functions (http://en.cppreference.c...
Android: Temporarily disable orientation changes in an Activity
...is in his self-answer, calling
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
and then
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
really works like charm... on real devices !
Don't think that it's broken when testing on the emulator, the ctrl+F11 shor...
What is the purpose of Looper and how to use it?
...ponsible for creating a queue in the thread.
For example, while writing an application that downloads files from the internet, we can use Looper class to put files to be downloaded in the queue.
How it works?
There is prepare() method to prepare the Looper. Then you can use loop() method to create...
How do you log server errors on django sites
...
the Exception passed into process_exception doesn't appear to have the stack trace, is there a way to get that?
– Nick BL
Sep 4 '19 at 17:38
add a comme...
How do I do an OR filter in a Django query?
...
@alexis: you could also do Item.objects.filter(creator__in=creators), for example.
– Kevin London
Dec 9 '14 at 23:11
4
...
How to reverse a string in Go?
...ints.
n := 0
rune := make([]rune, len(input))
for _, r := range input {
rune[n] = r
n++
}
rune = rune[0:n]
// Reverse
for i := 0; i < n/2; i++ {
rune[i], rune[n-1-i] = rune[n-1-i], rune[i]...
Convert a series of parent-child relationships into a hierarchical tree?
...ree to print out an unordered list:
function printTree($tree) {
if(!is_null($tree) && count($tree) > 0) {
echo '<ul>';
foreach($tree as $node) {
echo '<li>'.$node['name'];
printTree($node['children']);
echo '</li>'...