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How to check if element has any children in Javascript?
...stion, I have an element which I am grabbing via .getElementById () . How do I check if it has any children?
8 Answers
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Rails server says port already used, how to kill that process?
I'm on a mac, doing:
12 Answers
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When should null values of Boolean be used?
... boolean column in a database, for example). The null value might mean "we don't know if it's true or false" in this context.
each time a method needs an Object as argument, and you need to pass a boolean value. For example, when using reflection or methods like MessageFormat.format().
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How do I concatenate or merge arrays in Swift?
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Do we know whether Swift 2's Copy-On-Write intelligence extends to determining whether the b part of a is modified (therefore possibly eliding a copy of b during a.appendContentsOf(b))?
– Ephemera
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How can I deploy an iPhone application from Xcode to a real iPhone device?
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It sounds like the application isn't signed. Download ldid from Cydia and then use it like so: ldid -S /Applications/AccelerometerGraph.app/AccelerometerGraph
Also be sure that the binary is marked as executable: chmod +x /Applications/AccelerometerGraph.app/Accelerome...
How to delete multiple buffers in Vim?
... *.xml . I want to close all the XML files with :bd *.xml . However, Vim does not allow this (E93: More than one match...).
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How do I tell Gradle to use specific JDK version?
... The gradle.properties can be defined at project level too, see gradle.org/docs/current/userguide/build_environment.html
– Paolo Fulgoni
Jul 8 '14 at 10:32
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How do I switch to another subversion branch in Intellij?
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Just discovered switching branches is done using the update dialog (VCS -> Update Project, ⌘T), where I can select any branch, tag or revision I want.
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NPM/Bower/Composer - differences?
...command-line projects (bower itself is a npm package). If you are going to do anything with nodejs, then you are going to use npm.
bower is a package manager that aims at (front-end) web projects. You need npm and nodejs to install bower and to execute it, though bower packages are not meant specif...
How do I manipulate a variable whose name conflicts with PDB commands?
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> /home/user/test.py(2)<module>()
-> print('bar')
(Pdb)
The docs say:
! statement
Execute the (one-line) statement in the context of the current stack frame. The exclamation point can be omitted unless the first word of the statement resembles a debugger command. [...]
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