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Resize HTML5 canvas to fit window
...is 125% is often related to Device Pixel Resolution adjustment. Basically, if you are on a high pixel density device, the font will appear smaller than it should... so it will scale up to make the font be normal sized. As far as I understand it. You can check the display using: window.devicePixelRat...
Change date format in a Java string
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Use LocalDateTime#parse() (or ZonedDateTime#parse() if the string happens to contain a time zone part) to parse a String in a certain pattern into a LocalDateTime.
String oldstring = "2011-01-18 00:00:00.0";
LocalDateTime datetime = LocalDateTime.parse(oldstring, DateTimeForm...
Google Maps JS API v3 - Simple Multiple Marker Example
...lback argument to the addListener method. This can be quite a tricky topic if you are not familiar with how closures work. I would suggest checking out the following Mozilla article for a brief introduction if it is the case:
❯ Mozilla Dev Center: Working with Closures
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CSS3 :unchecked pseudo-class
...eeded on the unchecked state and would need removed from the checked state if used on the input[type="checkbox"] selector. See example below for clarification.
input[type="checkbox"] {
/* Base Styles aka unchecked */
font-weight: 300; // Will be overwritten by :checked
font-size: 16px; // Bas...
Extracting specific columns from a data frame
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Using the dplyr package, if your data.frame is called df1:
library(dplyr)
df1 %>%
select(A, B, E)
This can also be written without the %>% pipe as:
select(df1, A, B, E)
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How to add a downloaded .box file to Vagrant?
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what if i use vagrant box add my-box ./path/to/mybox.box ?
– Rakib
Sep 15 '15 at 10:53
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Passing two command parameters using a WPF binding
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Firstly, if you're doing MVVM you would typically have this information available to your VM via separate properties bound from the view. That saves you having to pass any parameters at all to your commands.
However, you could also m...
Difference between the Apache HTTP Server and Apache Tomcat? [closed]
What is the difference in terms of functionality between the Apache HTTP Server and Apache Tomcat?
8 Answers
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MongoDB: How to query for records where field is null or not set?
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If the sent_at field is not there when its not set then:
db.emails.count({sent_at: {$exists: false}})
If its there and null, or not there at all:
db.emails.count({sent_at: null})
Refer here for querying and null
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How do I replace text inside a div element?
... @Aeyoun The OP implied they were already using Prototype, so if that's the case it makes sense to take advantage of it.
– John Topley
Apr 8 '13 at 7:35
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