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Reasons for using the set.seed function
...R> sample(LETTERS, 5)
[1] "L" "P" "J" "E" "D"
These two, however, are identical because I set the seed:
R> set.seed(42); sample(LETTERS, 5)
[1] "X" "Z" "G" "T" "O"
R> set.seed(42); sample(LETTERS, 5)
[1] "X" "Z" "G" "T" "O"
R>
There is vast literature on all that; Wikipedia is a go...
A list of indices in MongoDB?
...ation like paddingFactor, size of the collection and number of elements inside of it.
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How can I use 'Not Like' operator in MongoDB
...s regular expression capability to create regular expression
objects. Consider the following example which uses the pattern match
expression //:
db.inventory.find( { item: { $not: /^p.*/ } } )
EDIT (@idbentley):
{$regex: 'ttt'} is generally equivalent to /ttt/ in mongodb, so your query would becom...
throw Error('msg') vs throw new Error('msg')
What's the difference? Looking at them in the chrome console, they look identical. Same properties on the object and the same __proto__ chain. Almost seems like Error acts like a factory.
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Changing the width of Bootstrap popover
...ootstrap ensures that if you use form-control you basically have a full-width input element.
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MySQL - length() vs char_length()
... var channelOptions = {
tags: "".split(" "),
id: "1"
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initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Standard Android menu icons, for example refresh [closed]
The Android SDK offers the standard menu icons via android.R.drawable.X . However, some standard icons, such as ic_menu_refresh (the refresh icon), are missing from android.R .
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What does [nyae] mean in Zsh?
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Hover and Active only when not disabled
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button:hover:enabled didn't seem to work in my case. Using IE9 emulation under IE11.
– Neolisk
Mar 3 '17 at 18:38
add a co...
SQL Server Management Studio SSMS tries to “save to file” instead of execute on F5
This happens intermittently and seems to be related to accidentally hitting a key.
2 Answers
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