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Boolean literals in PowerShell
...ts are true, for example. null, empty strings, empty arrays and the number 0 are false.
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C# List of objects, how do I get the sum of a property
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edited May 18 '17 at 10:29
Coops
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answered De...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...一个较小的值作为以后的MTU，比如说，主设备发出一个150个字节的MTU请求，但是从设备回应MTU是23字节，那么今后双方要以较小的值23字节作为以后的MTU），主从双方约定每次在做数据传输时不超过这个最大数据单元。
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valueOf() vs. toString() in Javascript
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The reason why ("x="+x) gives "x=value" and not "x=tostring" is the following. When evaluating ...
Java regular expression OR operator
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edited Jan 9 '10 at 0:57
answered Jan 9 '10 at 0:46
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Select records from NOW() -1 Day
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Judging by the documentation for date/time functions, you should be able to do something like:
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How do you validate a URL with a regular expression in Python?
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answered May 6 '09 at 1:09
S.LottS.Lott
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Convert Array to Object
... It will return the target object.
Object.assign({}, ['a','b','c']); // {0:"a", 1:"b", 2:"c"}
The own length property of the array is not copied because it isn't enumerable.
Also, you can use ES6 spread syntax to achieve the same result:
{ ...['a', 'b', 'c'] }
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Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...:2} is stored in a file and you want to update the value of "a" from 1 to 2000.
With MessagePack, 1 uses only 1 byte but 2000 uses 3 bytes. So "b" must be moved backward by 2 bytes, while "b" is not modified.
With BSON, both 1 and 2000 use 5 bytes. Because of this verbosity, you don't have to move...
Convert a character digit to the corresponding integer in C
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As per other replies, this is fine:
char c = '5';
int x = c - '0';
Also, for error checking, you may wish to check isdigit(c) is true first. Note that you cannot completely portably do the same for letters, for example:
char c = 'b';
int x = c - 'a'; // x is now not necessarily 1
Th...