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Cost of exception handlers in Python
...e just tried the following:
import timeit
statements=["""\
try:
b = 10/a
except ZeroDivisionError:
pass""",
"""\
if a:
b = 10/a""",
"b = 10/a"]
for a in (1,0):
for s in statements:
t = timeit.Timer(stmt=s, setup='a={}'.format(a))
print("a = {}\n{}".format(a,s))
...
Browsers' default CSS for HTML elements
... { margin: 8px }
h1 { font-size: 2em; margin: .67em 0 }
h2 { font-size: 1.5em; margin: .75em 0 }
h3 { font-size: 1.17em; margin: .83em 0 }
h4, p,
blockquote, ul,
fieldset, form,
ol, dl, dir,
menu { margin: 1.12em 0 }
h5 { font-...
Is 'float a = 3.0;' a correct statement?
...
It is not an error to declare float a = 3.0 : if you do, the compiler will convert the double literal 3.0 to a float for you.
However, you should use the float literals notation in specific scenarios.
For performance reasons:
Specifically, consider:
float foo(...
How can I update the current line in a C# Windows Console App?
...
805
If you print only "\r" to the console the cursor goes back to the beginning of the current line...
Logical operators for boolean indexing in Pandas
...
When you say
(a['x']==1) and (a['y']==10)
You are implicitly asking Python to convert (a['x']==1) and (a['y']==10) to boolean values.
NumPy arrays (of length greater than 1) and Pandas objects such as Series do not have a boolean value -- in other words, they ...
GoTo Next Iteration in For Loop in java
...d would start the next iteration upon invocation
For Example
for(int i= 0 ; i < 5; i++){
if(i==2){
continue;
}
System.out.print(i);
}
This will print
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How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
5
...
Android studio: new project vs new module
...
102
From the documentation (Android Studio is based on Intellij IDEA) :
Whatever you do in Inte...
How to determine the longest increasing subsequence using dynamic programming?
...
407
OK, I will describe first the simplest solution which is O(N^2), where N is the size of the col...
Socket客户端使用指导 · App Inventor 2 中文网
...Bytes）
向服务端发送二进制数据，参数是字节列表（0~255 的数字，负数按补码）。例：[165, 1, 255] 发出 A5 01 FF 三个字节；文本框里输入的十六进制「A501FF」要先用二进制组件的「十六进制转字节」转成字节列表。
...