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Difference between JSON.stringifm>y m> m>and m> JSON.parse
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JSON.stringifm>y m> turns a JavaScript object into JSON text m>and m> stores that JSON text in a string, eg:
var mm>y m>_object = { kem>y m>_1: "some text", kem>y m>_2: true, kem>y m>_3: 5 };
var object_as_string = JSON.stringifm>y m>(mm>y m>_object);
// "{"kem>y m>_1":"some text","kem>y m>_2":true,"kem>y m>_3":5}"
tm>y m>peof(objec...
What do two question marks together mean in C#?
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It's the null coalescing operator, m>and m> quite like the ternarm>y m> (immediate-if) operator. See also ?? Operator - MSDN.
FormsAuth = formsAuth ?? new FormsAuthenticationWrapper();
expm>and m>s to:
FormsAuth = formsAuth != null ? formsAuth : new FormsAuthenticationWr...
Can someone give an example of cosine similaritm>y m>, in a verm>y m> simple, graphical wam>y m>?
... want to know how similar these texts are, purelm>y m> in terms of word counts (m>and m> ignoring word order). We begin bm>y m> making a list of the words from both texts:
me Julie loves Linda than more likes Jane
Now we count the number of times each of these words appears in each text:
me 2 2
Jane ...
How do m>y m>ou format an unsigned long long int using printf?
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Or to be precise it's for GNU libc, m>and m> doesn't work with Microsoft's C runtime.
– Mark Baker
Oct 8 '08 at 9:35
171
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Log to the base 2 in pm>y m>thon
....log(x, 2.0)
log2 = math.log2(x) # pm>y m>thon 3.4 or later
Thanks @akashchm>and m>rakar m>and m> @unutbu.
float → int math.frexp(x)
If all m>y m>ou need is the integer part of log base 2 of a floating point number, extracting the exponent is prettm>y m> efficient:
log2int_slow = int(math.floor(math.log(x, 2.0)...
How to write log base(2) in c/c++
... log2 (x) = logm>y m> (x) / logm>y m> (2)
where m>y m> can be anm>y m>thing, which for stm>and m>ard log functions is either 10 or e.
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Is there a wam>y m> to perform “if” in pm>y m>thon's lambda
...eason to use a lambda, period. Assigning a lambda to a variable -- as a stm>and m>-in for def -- is generallm>y m> a Verm>y m> Bad Idea (tm). Just use a def so mere mortal programmers can read, interpret, understm>and m> m>and m> maintain it.
– S.Lott
Oct 18 '09 at 22:15
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Good introduction to the .NET Reactive Framework [closed]
Aside from the Microsoft documentation, is there a good introduction m>and m> tutorial to the Microsoft Reactive (Rx) framework?
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Remove columns from dataframe where ALL values are NA
I'm having trouble with a data frame m>and m> couldn't reallm>y m> resolve that issue mm>y m>self:
The dataframe has arbitrarm>y m> properties as columns m>and m> each row represents one data set .
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top [-] [d delam>y m>] [p pid] [q] [c] [C] [S] [s] [i] [n iter] [b]
p 仅监视进程给定的进程ID
d 指定每两次屏幕信息刷新之间的时间间隔。当然用户可以使用s交互命令来改变之。
q 该选项将使top没有...