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Insert a line at specific line number with sed or awk
I have a script file which I need to modify with another script to insert a text at the 8th line.
9 Answers
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C# - how to determine whether a Type is a number
...on Type, so you can't. You can switch on TypeCode of course, but that's a different matter.
– Jon Skeet
Aug 5 '13 at 15:06
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Unable to export Apple production push SSL certificate in .p12 format
I am using Urban airship in my application for push notification. So, I need to download the push SSL certificate from Apple developer portal. After downloading, I added that in keychain access. But no private key was created for the certificate. When I tried to right click and export the certificat...
Get div height with plain JavaScript
...unction. Please note that getBoundingClientRect will return an empty rect if the element's display is 'none'.
Example:
var elem = document.getElementById("myDiv");
if(elem) {
var rect = elem.getBoundingClientRect();
console.log("height: " + rect.height);
}
UPDATE:
Here is the same code writt...
How do you delete an ActiveRecord object?
...out a primary key
Note: from @hammady's comment, user.destroy won't work if User model has no primary key.
Note 2: From @pavel-chuchuva's comment, destroy_all with conditions and delete_all with conditions has been deprecated in Rails 5.1 - see guides.rubyonrails.org/5_1_release_notes.html
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How can I list (ls) the 5 last modified files in a directory?
I know ls -t will list all files by modified time. But how can I limit these results to only the last n files?
5 Answe...
Internet Explorer 11 disable “display intranet sites in compatibility view” via meta tag not working
...: HTML1122: Internet Explorer is running in Enterprise Mode emulating IE8.
If so you may need to disable enterprise mode (or like this) or turn it off for that website from the Tools menu in IE.
However Enterprise Mode should in theory be overridden by the X-UA-Compatible tag, but IE might have a bu...
Multiple select statements in Single query
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"Operand should contain 1 column(s)" - only if your merged tables differ in columns count. They should match. 1 column per table in this example.
– Zon
Apr 22 '16 at 10:54
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Spring CrudRepository findByInventoryIds(List inventoryIdList) - equivalent to IN clause
...in the current documentation listing. It shows that IsIn is equivalent – if you prefer the verb for readability – and that JPA also supports NotIn and IsNotIn.
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ASP.NET MVC A potentially dangerous Request.Form value was detected from the client when using a cus
... the ASP.NET MVC sources reveals that the DefaultModelBinder first checks if request validation is required and then calls the bindingContext.UnvalidatedValueProvider.GetValue() method with a parameter that indicates if validation is required or not.
Unfortunately we can’t use any of the framewo...