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'echo' without newline in a shell script
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By starting with the line #!/bin/bash it worked. Normally I'm working with bash.
– qwertz
Jun 25 '12 at 16:46
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Check if application is installed - Android
...abled or disabled state.
We all know an app can be installed but disabled by the user, therefore unusable.
This checks for installed AND enabled apps:
public static boolean isPackageInstalled(String packageName, PackageManager packageManager) {
try {
return packageManager.getApplicati...
How to get a Static property with Reflection
...ags.Static);
// Use the PropertyInfo to retrieve the value from the type by not passing in an instance
object value = propertyInfo.GetValue(null, null);
// Cast the value to the desired type
ExpectedType typedValue = (ExpectedType) value;
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JavaFX Application Icon
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'<yourclassname>.class' could be replace by 'getClass()'
– Jim Fred
Aug 30 '18 at 14:32
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Linux - Install redis-cli only
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To expand on @Agis's answer, you can also install the Redis CLI by running
$ git clone -b v2.8.7 git@github.com:antirez/redis.git
$ make -C redis install redis-cli /usr/bin
This will build the Redis CLI and toss the binary into /usr/bin. To anyone who uses Docker, I've also built a Do...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...AML::dump shorthand (y) under Rails console:
>> y User.first
--- !ruby/object:User
attributes:
created_at: 2009-05-24 20:16:11.099441
updated_at: 2009-05-26 22:46:29.501245
current_login_ip: 127.0.0.1
id: "1"
current_login_at: 2009-05-24 20:20:46.627254
login_count: "1"
last_l...
how to convert an RGB image to numpy array?
...rray' is a little ugly because I clip incoming data to [0,255], convert to bytes, then create a grayscale image. I mostly work in gray.
An RGB image would be something like:
outimg = Image.fromarray( ycc_uint8, "RGB" )
outimg.save( "ycc.tif" )
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How do you convert a DataTable into a generic list?
...doing this has helped performance from just using a foreach over a datarow by 50% time.
– lloydom
Feb 24 '12 at 10:04
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Output first 100 characters in a string
...indices are handled
gracefully: an index that is too large
is replaced by the string size, an
upper bound smaller than the lower
bound returns an empty string.
So it is safe to use x[:100].
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Node.js getaddrinfo ENOTFOUND
...80,
path: '/wiki/EteRNA_Dictionary'
}
Update
As stated in the comment by @EnchanterIO, the port field is also a separate option; and the protocol http:// shouldn't be included in the host field. Other answers also recommends the use of https module if SSL is required.
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