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How to create a simple map using JavaScript/JQuery [duplicate]
...hat map only contains one entry with the String key [object Object]:
> JSON.stringify(map);
{"[object Object]": 2}
This is clearly not a replacement for Java's HashMap. Bizarrely, given it's age, Javascript does not currently have a general purpose map object. There is hope on the horizon, tho...
MySQL vs MongoDB 1000 reads
...tched by id)
Retrieve the contents of one database page (the actual binary json document)
So a b-tree lookup, and a binary page read. Log(n) + 1 IOs. If the indexes can reside entirely in memory, then 1 IO.
In MySQL with 20 tables, you have to perform:
One index lookup on the root table (again,...
count members with jsonpath?
Is it possible to count the number of members using JsonPath?
5 Answers
5
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gulp.run is deprecated. How do I compose tasks?
...s', client);
gulp.watch('src/admin/*.css', client);
gulp.watch('src/geojson-index.json', ['copygeojson']);
});
You no longer need to pass a function (though you still can) to run tasks. You can give watch an array of task names and it will do this for you.
...
callback to handle completion of pipe
...te readStreams from file. But in my case readStream has to be created from JSON string coming from a message pool.
var jsonStream = through2.obj(function(chunk, encoding, callback) {
this.push(JSON.stringify(chunk, null, 4) + '\n');
callback();
...
Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...对论坛版块生成sitemaps xml：●建立一个名为cron_sitemaps php的文件；●复制以下代码区的内容到cron_sitemaps php中，并保存文件；PS：注意编码，选择自己DZ对应的编码，我 只针对论坛版块生成sitemaps.xml：
●建立一个名为“cron_sitema...
Creating a BLOB from a Base64 string in JavaScript
...is method you can also easily get a ReadableStream, ArrayBuffer, text, and JSON.
(fyi this also works with node-fetch in Node)
As a function:
const b64toBlob = (base64, type = 'application/octet-stream') =>
fetch(`data:${type};base64,${base64}`).then(res => res.blob())
I did a simple perf...
What is a correct mime type for docx, pptx etc?
...
Here is the (almost) complete file extensions's MIME in a JSON format.
Just do example: MIME["ppt"], MIME["docx"], etc
{"x3d": "application/vnd.hzn-3d-crossword", "3gp": "video/3gpp", "3g2": "video/3gpp2", "mseq": "application/vnd.mseq", "pwn": "application/vnd.3m.post-it-notes", "...
VC MFC工具栏(CToolBar)控件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...SetImageList函数可以做到，既然要显示真彩位图，那就不能使用上面的工具栏资源（256色），所以一切都得到用代码实现
首先向工程引入六张位图（用于工具栏按钮显示的图片），假设ID号分别为IDB_BITMAP1，IDB_BITMAP2，IDB_BITMAP3,IDB_...
What's the difference between console.dir and console.log?
...rints the element in an HTML-like tree
console.dir prints the element in a JSON-like tree
Specifically, console.log gives special treatment to DOM elements, whereas console.dir does not. This is often useful when trying to see the full representation of the DOM JS object.
There's more information...