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How are GCC and g++ bootstrapped?
...ould produce the same results (identical binaries, discounting macros like __DATE__ and __TIME__ which vary even between invocations of the same compiler) as GCC compiled with [GCC compiled with [other]] - if not, that's a bug, and the 3-stage bootstrap build is designed to catch that.
...
How to quickly edit values in table in SQL Server Management Studio?
... idea, if your table has millions of rows.....
– marc_s
Oct 8 '09 at 5:09
why don't just enter the desired value for e...
What does FETCH_HEAD in Git mean?
...
FETCH_HEAD is a short-lived ref, to keep track of what has just been fetched from the remote repository. git pull first invokes git fetch, in normal cases fetching a branch from the remote; FETCH_HEAD points to the tip of this bra...
I ran into a merge conflict. How can I abort the merge?
... you to use the "theirs" merge strategy:
git pull --strategy=theirs remote_branch
But this has since been removed, as explained in this message by Junio Hamano (the Git maintainer). As noted in the link, instead you would do this:
git fetch origin
git reset --hard origin
...
Does C# have extension properties?
...{
private static readonly ConditionalWeakTable<Person, Employee> _employees =
new ConditionalWeakTable<Person, Employee>();
public decimal Salary
{
get
{
// `this` is the instance of Person
return _employees.GetOrCreate(this...
Best practices for in-app database migration for Sqlite
...t/set this variable with the following sqlite statements:
> PRAGMA user_version;
> PRAGMA user_version = 1;
When the app starts, I check the current user-version, apply any changes that are needed to bring the schema up to date, and then update the user-version. I wrap the updates in a t...
clear javascript console in Google Chrome
...
Chrome:
console._commandLineAPI.clear();
Safari:
console._inspectorCommandLineAPI.clear();
You can create your own variable, which works in both:
if (typeof console._commandLineAPI !== 'undefined') {
console.API = console._commandL...
Best way to iterate through a Perl array
...C instead of Perl, and no needless copying of the array elements occurs. ($_ is aliased to the element in #1, but #2 and #3 actually copy the scalars from the array.)
#5 might be similar.
In terms memory usage: They're all the same except for #5.
for (@a) is special-cased to avoid flattening the a...
Understanding the map function
...tesian product with a list comprehension though:
[(a, b) for a in iterable_a for b in iterable_b]
The syntax is a little confusing -- that's basically equivalent to:
result = []
for a in iterable_a:
for b in iterable_b:
result.append((a, b))
...
Pandas percentage of total with groupby
...you can calculate the percentage in a simpler way -- just groupby the state_office and divide the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
...