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NPM cannot install dependencies - Attempt to unlock something which hasn't been locked
I've been trying to run an npm install on my package.json file, but I'm having a lot of trouble. It keeps saying "Error: Attempt to unlock XXX, which hasn't been locked" on all my dependences. Here's one of them:
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How to allow to accept only image files?
...t is very sketchy on mobiles (as of 2015) and by some reports this may actually prevent some mobile browsers from uploading anything at all, so be sure to test your target platforms well.
For detailed browser support, see http://caniuse.com/#feat=input-file-accept
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How to check if a variable is null or empty string or all whitespace in JavaScript?
... @Madbreaks the op stated "What I need is something like this C# method: String.IsNullOrWhiteSpace". That method treats tabs as whitespace.
– subsci
Sep 26 '14 at 22:09
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Access properties file programmatically with Spring?
...code, there is the @Value annotation:
@Value("${settings.some.property}")
String someValue;
To access placeholders From SPEL use this syntax:
#('${settings.some.property}')
To expose configuration to views that have SPEL turned off, one can use this trick:
package com.my.app;
import java.uti...
How to use glOrtho() in OpenGL?
...ou specify a Z value for your vertex's position, it will be clipped if it falls outside that range. Otherwise if it's inside that range, it will appear to have no effect on the position except for Z tests.
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Declare a block method parameter without using a typedef
... (void)smartBlocks:(NSString *)yo youSmart:(void (^) (NSString *response))handler {
if ([yo compare:@"Pen"] == NSOrderedSame) {
handler(@"Ink");
}
if ([yo compare:@"Pencil"] == NSOrderedSame) {
handler(@"led");
}
}
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What are bitwise shift (bit-shift) operators and how do they work?
...hift operator, and meets the needs of both logical and arithmetic shifts.
All of these operators can be applied to integer values (int, long, possibly short and byte or char). In some languages, applying the shift operators to any datatype smaller than int automatically resizes the operand to be a...
How many constructor arguments is too many?
...e fluent interface in action would be:
public class CustomerBuilder {
String surname;
String firstName;
String ssn;
public static CustomerBuilder customer() {
return new CustomerBuilder();
}
public CustomerBuilder withSurname(String surname) {
this.surname = ...
How to check if a file is a valid image file?
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That won't be sufficient if he's really testing for "valid" images; the presence of a magic number doesn't guarantee that the file hasn't been truncated, for example.
– Ben Blank
May 20 '09 at 18:11
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Can you use if/else conditions in CSS?
... in your respective programming language.
I sometimes send css classes as strings to the view and echo them into the code like that (php):
<div id="myid" class="<?php echo $this->cssClass; ?>">content</div>
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