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Python: Checking if a 'Dictionary' is empty doesn't seem to work
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answered Dec 16 '16 at 10:00
Achilles Ram NakirekantiAchilles Ram Nakirekanti
2,1691616 silver badges1313 bronze badges
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Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
...函数中调用。
以下来自：http://www.kuqin.com/language/20100307/80980.html
前几天我们项目刚刚解决了一个pure virtual function call引起的stopship的bug，乘热打铁，学习总结一下。
一、理论上case
当一个纯虚函数被调用到时，vc++的debug模...
Watch multiple $scope attributes
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109
Note that the first parameter is not an array. It's a string that looks like an array.
– M.K. Safi
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Matplotlib - Move X-Axis label downwards, but not X-Axis Ticks
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
... more complex expressions:
auto a = x * x - 4 * x + 4;
auto b = x * (x + 10) / ( x * x+ 12 );
auto c = (x ^ 4 + x ^ 3 + x ^ 2 + x + 100 ) / ( x ^ 2 + 10 );
The type of such expressions would be even more huge and ugly, but thanks to auto, we now can let the compiler infer the type of the express...
What's the difference between eval, exec, and compile?
...ass a reference to exec:
>>> call_later(exec, 'print(42)', delay=1000)
File "<stdin>", line 1
call_later(exec, 'print(42)', delay=1000)
^
SyntaxError: invalid syntax
Which a pattern that someone might actually have used, though unlikely;
Or use it in a lis...
simple HTTP server in Java using only Java SE API
...an just copy'n'paste'n'run it on Java 6+.
package com.stackoverflow.q3732109;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServe...
JSTL in JSF2 Facelets… makes sense?
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answered Jul 27 '10 at 12:40
BalusCBalusC
953k341341 gold badges34193419 silver badges34053405 bronze badges
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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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# stdout { }
# 输出到redis
redis {
host => "10.140.45.190" # redis主机地址
port => 6379 # redis端口号
db => 8 # redis数据库编号
data_type => "channel" # 使用发布/订阅模式
key => ...
Format number to always show 2 decimal places
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(Math.round(num * 100) / 100).toFixed(2);
Live Demo
var num1 = "1";
document.getElementById('num1').innerHTML = (Math.round(num1 * 100) / 100).toFixed(2);
var num2 = "1.341";
document.getElementById('num2').innerHTML = (Math.round(...