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How to get Android crash logs?
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If your app is being downloaded by other people and crashing on remote devices, you may want to look into an Android error reporting library (referenced in this SO post). If it's just on your own local device, you can use LogCat. Even if the device wasn't connected to a ...
Merge 2 arrays of objects
...{ name: "age", value: "28" },
{ name: "childs", value: '5' }
]
// Convert to key value dictionary or object
const convertToKeyValueDict = arrayObj => {
const val = {}
arrayObj.forEach(ob => {
val[ob.name] = ob.value
})
return val
}
// update or merge ...
System.Timers.Timer vs System.Threading.Timer
I have been checking out some of the possible timers lately, and System.Threading.Timer and System.Timers.Timer are the ones that look needful to me (since they support thread pooling).
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Mercurial (hg) commit only certain files
...efresh -s bar.c # add another file to the patch
$ hg qfinish -a # convert applied patches to normal changesets
I don't really use MQ for this purpose myself, though, since I think it's enough to just specify the filenames on the command line.
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BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... = 0x11, /* 设备安全管理OOB标志 */
BLE_AD_TYPE_INT_RANGE = 0x12, /* 设备连接参数范围 */
BLE_AD_TYPE_SOL_SRV_UUID = 0x14, /* 设备16bit服务UUID */
BLE_AD_TYPE_128SOL_SRV_UUID = 0x15, /* 设备128bit服务UUI...
How to insert element into arrays at specific position?
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array_slice() can be used to extract parts of the array, and the union array operator (+) can recombine the parts.
$res = array_slice($array, 0, 3, true) +
array("my_key" => "my_value") +
array_slice($array, 3, count($array)-3, true);
This example:
$array = array(
...
Nesting await in Parallel.ForEach
...The whole idea behind Parallel.ForEach() is that you have a set of threads and each thread processes part of the collection. As you noticed, this doesn't work with async-await, where you want to release the thread for the duration of the async call.
You could “fix” that by blocking the ForE...
How to create a tuple with only one element
...below example I would expect all the elements to be tuples, why is a tuple converted to a string when it only contains a single string?
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What is the difference between pluck and collect in Rails?
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Yes. According to Rails guides, pluck directly converts a database result into an array, without constructing ActiveRecord objects. This means better performance for a large or often-running query.
In addition to @apneadiving's answer, pluck can take both single and mult...
Primary key or Unique index?
At work we have a big database with unique indexes instead of primary keys and all works fine.
15 Answers
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