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Convert string to a variable name
...reg mentioned, assign to assign the variables.
original_string <- c("x=123", "y=456")
pairs <- strsplit(original_string, "=")
lapply(pairs, function(x) assign(x[1], as.numeric(x[2]), envir = globalenv()))
ls()
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How do I parse a URL query parameters, in Javascript? [duplicate]
...ter for the first one). For your example, the above would result in:
{v: "123", p: "hello"}
Here's a working example.
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Removing empty lines in Notepad++
...
123
There is a plugin that adds a menu entitled TextFX. This menu, which houses a dizzying array ...
How can I import a database with MySQL from terminal?
...ple:
mysql -u root -p wp_users < wp_users.sql
mysql -u root -pPassword123 wp_users < wp_users.sql
See also:
4.5.1.5. Executing SQL Statements from a Text File
Note: If you are on windows then you will have to cd (change directory) to your MySQL/bin directory inside the CMD before exec...
How do I convert a PDF document to a preview image in PHP? [closed]
...
@think123 use $im->thumbnailImage(1500, 0); That will set your jpg image to a width of 1500 and retain scale. See documentation
– Kevin Jantzer
Jan 21 '14 at 17:37
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Is it possible to have a multi-line comments in R? [duplicate]
...k another time ` # if(FALSE){ ` and ` # } `
– Gabriel123
Sep 6 '17 at 11:20
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Is there a way to perform “if” in python's lambda
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David WoleverDavid Wolever
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How to assign name for a screen? [closed]
...ie Alpert
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answered Jul 8 '10 at 9:29
miedwarmiedwar
7,10011 gold badg...
How to remove a field completely from a MongoDB document?
... looks like this:
{
name: 'book',
tags: [
{
words: ['abc','123'],
lat: 33,
long: 22
}, {
words: ['def','456'],
lat: 44,
long: 33
}
]
}
To remove the column words from the embedded document, do this:
db.example.update(
{'tags': {'$exists':...
App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
...示例
Camera 拍照
/storage/emulated/0/PIC_123.jpg
ImagePicker 选择
content://com.android.providers.media.documents/document/image%3A123
App 内部文件
/data/data/pkg.name/files/myfile.txt
ASD 目录
...