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Order of member constructor and destructor calls
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dirkgentlydirkgently
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Running bash script from within python
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Adam MatanAdam Matan
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Find and replace string values in list
...ced = [w.replace('1', '<1>') for w in words]
100 loops, best of 3: 2.98 ms per loop
In [3]: %timeit replaced = map(lambda x: str.replace(x, '1', '<1>'), words)
100 loops, best of 3: 5.09 ms per loop
In [4]: %timeit replaced = map(lambda x: x.replace('1', '<1>'), words)
100 loops,...
sqlite database default time value 'now'
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98
according to dr. hipp in a recent list post:
CREATE TABLE whatever(
....
timestamp D...
const vs constexpr on variables
...u can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 may be initialized at compile time or run time. Furthermore, only PI2 can be used in a context that requires a compile-time constant. For example:
constexpr double PI3 = PI1; // er...
How to parse a JSON string to an array using Jackson
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StaxManStaxMan
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Update Item to Revision vs Revert to Revision
...n that your workingcopy is out of date.
revert to this revision will undo all changes in your working copy which were made after the selected revision (in your example rev. 96,97,98,99,100)
Your working copy is now in modified state.
The file content of both scenarions is same, however in first c...
When should I use the new keyword in C++?
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Method 1 (using new)
Allocates memory for the object on the free store (This is frequently the same thing as the heap)
Requires you to explicitly delete your object later. (If you don't delete it, you could create a memory leak)
Memory stays al...
How to find the lowest common ancestor of two nodes in any binary tree?
...west common ancestor problem page on Wikipedia. (Credit to Jason for originally posting this link)
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App Inventor 2 字典(Dictionary)操作教程 - 键值对数据结构 · App Inventor 2 中文网
...path
list by walking key path（沿路径收集值）
walk all at level（遍历当前层）
判断数据类型：is a dictionary?
字典在JSON解析中的应用
解析JSON字符串
解析嵌套JSON
解析JSON数组中的对象
实战案...