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Is a view faster than a simple query?
...e the indexed view directly, or, more importantly, the query optimizer can select the view if it determines that the view can be substituted for some or all of the query in the lowest-cost query plan. In the second case, the indexed view is used instead of the underlying tables and their ordinary in...
jquery's append not working with svg element?
...would not render while the D3-generated ones did! I recommend using D3: d3.select('body').append('svg').attr('width','100%');
– chharvey
Dec 15 '14 at 21:36
3
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WPF ToolBar: how to remove grip and overflow
...e for the ToolBarPanel, Menu, or ToolBar.
Right click on the ToolBar and select Edit Template
From Edit Template, select Edit a Copy
I recommend adding the copy to a Resource Dictionary
Click Ok
You'll now be editing the control template for the ToolBarPanel, and can set the visibility to Collap...
MLKitFaceMesh 拓展：面部网格（468 个关键点） · App Inventor 2 中文网
... 标签1.Text = "检测中…"
FaceMesh1.DetectFromFile(图像选择器1.Selection)
}
when FaceMesh1.GotFaceMesh(faceCount, pointCount, boundsJson) {
标签1.Text = join("检测到 ", faceCount, " 张脸，", pointCount, " 个点")
标签_眼睛.Text = FaceMesh1.RegionPoints("LEFT_EYE", 1)
}
w...
LINQ Aggregate algorithm explained
...ggregate help readability? In general I love LINQ because I think .Where, .Select, .OrderBy and so on greatly helps readability (if you avoid inlined hierarhical .Selects). Aggregate has to be in Linq for completeness reasons but personally I am not so convinced that .Aggregate adds readability comp...
When to use MongoDB or other document oriented database systems? [closed]
...cal CRUD stuff. Storing what is essentially a huge hash, and being able to select on any of those keys, is what most people use a relational database for. If your DB is 3NF and you don’t do any joins (you’re just selecting a bunch of tables and putting all the objects together, AKA what most peo...
How to flatten tree via LINQ?
...IEnumerable<MyNode> Flatten(IEnumerable<MyNode> e) =>
e.SelectMany(c => Flatten(c.Elements)).Concat(new[] { e });
You can then filter by group using Where(...).
To earn some "points for style", convert Flatten to an extension function in a static class.
public static IEnume...
When to Redis? When to MongoDB? [closed]
...e, writing stupid sql statements... not just one but freaking everywhere. "select this, select that". But in particular you remember the irritating WHERE clause. Where lastname equals "thornton" and movie equals "bad santa." Urgh. You think, "why don’t those dbas just do their job and give me som...
Why does SSL handshake give 'Could not generate DH keypair' exception?
...DHE_.... The later would happen if I added BouncyCastle. If TLS_ECDHE_ was selected, MOST OF the time it worked, but not ALWAYS, so adding even BouncyCastle provider was unreliable (failed with same error, every other time or so). I guess somewhere in the Sun SSL implementation sometimes it choose D...
Are email addresses case sensitive?
...eudocode:
if (user.paidEmailFee) {
// case sensitive email
query = "select * from users where email LIKE ' + user.email + '"
} else {
// case insensitive email
query = "select * from users where email ILIKE ' + user.email + '"
}
This way, you are mostly enforcing case insensitivity bu...