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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容...
第1条：慎重选择容器类型。
标准STL序列容器：vector、string、deque和list。
标准STL关联容器：set、multiset、map和multimap。
非标准...
Is there a way to perform “if” in python's lambda
...
The syntax you're looking for:
lambda x: True if x % 2 == 0 else False
But you can't use print or raise in a lambda.
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STL 算法 - C/C++ - 清泛网 - 专注C/C++及内核技术
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集合算法(4个)
函数名
头文件
函数功能
set_union
<algorithm>
构造一个有序序列，包含两个序列中所有的不重复元素。重载版本使用自定义的比较操作
函数原形
template<class InIt1, class InIt2, class OutIt> OutIt set_...
ElasticSearch: Unassigned Shards, how to fix?
...nable shard allocation.
# v0.90.x and earlier
curl -XPUT 'localhost:9200/_settings' -d '{
"index.routing.allocation.disable_allocation": false
}'
# v1.0+
curl -XPUT 'localhost:9200/_cluster/settings' -d '{
"transient" : {
"cluster.routing.allocation.enable" : "all"
}
}'
Elast...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...plier.
To generate a random number:
Multiply the seed by the multiplier.
Set the seed equal to this value.
Return this value.
This generator has many nice properties, but has significant problems as a good random source. The Wikipedia article linked above describes some of the strengths and we...
How to append output to the end of a text file
... the contents of the file. To ensure that doesn't ever happen, you can add set -o noclobber to your .bashrc.
This ensures that if you accidentally type command > file_to_append_to to an existing file, it will alert you that the file exists already. Sample error message: file exists: testFile.tx...
How to get HTTP Response Code using Selenium WebDriver
...LoggingPreferences();
logPrefs.enable(LogType.PERFORMANCE, Level.ALL);
cap.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);
After the request is done, all you have to do is get and iterate the Perfomance logs and find "Network.responseReceived" for the requested url:
LogEntries logs = drive...
Character reading from file in Python
In a text file, there is a string "I don't like this".
8 Answers
8
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How to implement a queue with three stacks?
...ke to.
The third stack is also irrelevant. What matters is that there's a set of bounded stacks, and a set of unbounded stacks. The minimum needed for an example is 2 stacks. The number of stacks must be, of course, finite.
Lastly, if I am right that there's no proof, then there should be an easie...
How many bytes does one Unicode character take?
...ted a lot of time on this useless list (but it's sorted!).
MySQL has a charset called "utf8" which actually does not support characters longer than 3 bytes. So you can't insert a pile of poo, the field will be silently truncated. Use "utf8mb4" instead.
There's a snowman test page (unicodesnowmanfory...