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How to print a number with commas as thousands separators in JavaScript
...ith commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go about doing this?
...
在线服务的黑天鹅 - 资讯 - 清泛网 - 专注C/C++及内核技术
...用百分比来表示。在线服务通常看到最多的是以下3种
99.9%，服务中断时间：525.6分钟/年
99.99%，服务中断时间：52.56分钟/年
99.999%，服务中断时间：5.256分钟/年
当一个系统有大量用户使用之后，对系统可用性有较高要求，...
How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting
...ion
from sklearn.preprocessing import FunctionTransformer
np.random.seed(123)
# General Functions
def func_exp(x, a, b, c):
"""Return values from a general exponential function."""
return a * np.exp(b * x) + c
def func_log(x, a, b, c):
"""Return values from a general log function...
Getting key with maximum value in dictionary?
..., 91: 93, 92: 18, 93: 18, 94: 106, 95: 106, 96: 13, 9232: 35,
98: 26, 99: 26, 100: 26, 101: 26, 103: 88, 104: 13, 106: 13, 107: 101, 1132: 63,
2158: 51, 112: 21, 113: 13, 116: 21, 118: 34, 119: 34, 7288: 45, 121: 96, 122: 21,
124: 109, 125: 109, 128: 8, 1154: 32, 131: 29, 134: 29, 136...
ReSharper warns: “Static field in generic type”
...tity{ SomeValue = "Bar" };
var thirdInst = new OtherEntity { OtherValue = 123 };
var fourthInst = new OtherEntity { OtherValue = 456 };
var xmlData1 = firstInst.Serialize();
var xmlData2 = secondInst.Serialize();
var xmlData3 = thirdInst.Serialize();
var xmlData4 = fourthInst.Serialize();
In thi...
How do I profile memory usage in Python?
...
123
This one has been answered already here: Python memory profiler
Basically you do something li...
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
...alues of 12abc will return abc, value of 1abc will return abc, value of abc123 will return "Not Matched" because the digits were not at the start of the string.
Private Sub simpleRegex()
Dim strPattern As String: strPattern = "^[0-9]{1,2}"
Dim strReplace As String: strReplace = ""
Dim r...
Pass a data.frame column name to a function
...e more about tidyeval here.
library(rlang)
library(tidyverse)
set.seed(123)
df <- data.frame(B = rnorm(10), D = rnorm(10))
Use column names as strings
fun3 <- function(x, ...) {
# capture strings and create variables
dots <- ensyms(...)
# unquote to evaluate inside dplyr verbs
...
What happens if I define a 0-size array in C/C++?
...
An array cannot have zero size.
ISO 9899:2011 6.7.6.2:
If the expression is a constant expression, it shall have a value greater than zero.
The above text is true both for a plain array (paragraph 1). For a VLA (variable length array), the behavior is undef...
Memoization in Haskell?
... f does what you mean for small values of f by calling, for example: fix f 123 = 144
We could memoize this by defining:
f_list :: [Int]
f_list = map (f faster_f) [0..]
faster_f :: Int -> Int
faster_f n = f_list !! n
That performs passably well, and replaces what was going to take O(n^3) time...