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How to drop columns using Rails migration
...ill be created: rails g migration RemoveUnusefulFieldsFromUsers hair_color:string favorite_number:integer removes two attributes using a single migration. Note also that remove_column is not supported by change method, so you have to write both up and down.
– Claudio Floreani
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Adding two numbers concatenates them instead of calculating the sum
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They are actually strings, not numbers. The easiest way to produce a number from a string is to prepend it with +:
var x = +y + +z;
share
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Path.Combine absolute with relative path strings
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What Works:
string relativePath = "..\\bling.txt";
string baseDirectory = "C:\\blah\\";
string absolutePath = Path.GetFullPath(baseDirectory + relativePath);
(result: absolutePath="C:\bling.txt")
What doesn't work
string relativePat...
Is there a shortcut to move between header and source file in VC++?
...riting the thing :)):
Sub FileSwitch()
Try
Dim CurrentPath As String = DTE.ActiveDocument.FullName
Dim OtherPath As String
If (IO.Path.HasExtension(CurrentPath)) Then
Dim CurrentExtension As String = IO.Path.GetExtension(CurrentPath)
Select Case...
NPM global install “cannot find module”
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For anyone else running into this, I had this problem due to my npm installing into a location that's not on my NODE_PATH.
[root@uberneek ~]# which npm
/opt/bin/npm
[root@uberneek ~]# which node
/opt/bin/node
[root@uberneek ~]# echo $NODE_PATH
My NODE_PATH was empty, and running npm install --...
Automatically start a Windows Service on install
I have a Windows Service which I install using the InstallUtil.exe. Even though I have set the Startup Method to Automatic, the service does not start when installed, I have to manually open the services and click start. Is there a way to start it either via the command line, or through the code of ...
How to find files that match a wildcard string in Java?
This should be really simple. If I have a String like this:
16 Answers
16
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Is there a limit to the length of HTML attributes?
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I've just written a test which puts a string of length 10 million into an attribute and then retrieves it again, and it works fine (Firefox 3.5.2 & Internet Explorer 7)
50 million makes the browser hang with the "This script is taking a long time to complete...
How can I check if an argument is defined when starting/calling a batch file?
...guments.
⍟ exist on file system (either file or directory?) or a generic string.
⍟ specify if is a file
⍟ specify is a directory
⍟ no extensions, would work in legacy scripts!
⍟ minimal code ☺
@echo off
:loop
::-------------------------- has argument ?
if ["%~1"]==[""] (
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How to set an “Accept:” header on Spring RestTemplate request?
...ept(Collections.singletonList(MediaType.APPLICATION_JSON));
HttpEntity<String> entity = new HttpEntity<>("body", headers);
restTemplate.exchange(url, HttpMethod.POST, entity, String.class);
I prefer this solution because it's strongly typed, ie. exchange expects an HttpEntity.
Howev...