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How to check if a json key exists?
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JSONObject class has a method named "has":
http://developer.android.com/reference/org/json/JSONObject.html#has(java.lang.String)
Returns true if this object has a mapping for name. The mapping may be NULL.
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What does “Content-type: application/json; charset=utf-8” really mean?
...ndant you might want to include charset=utf-8 for security reasons: github.com/shieldfy/API-Security-Checklist/issues/25
– manuc66
Jul 14 '17 at 13:43
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What is the effect of encoding an image in base64?
... @Blender But in my case when i convert a 70kb bitmap to string its becoming 500kb.Its not 37%.I have compressed a 5mb image to 70kb and then convert that compressed image to string that become 500kb.
– KJEjava48
Apr 19 '17 at 6:05
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Difference between “\n” and Environment.NewLine
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161
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Releasing memory in Python
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Memory allocated on the heap can be subject to high-water marks. This is complicated by Python's internal optimizations for allocating small objects (PyObject_Malloc) in 4 KiB pools, classed for allocation sizes at multiples of 8 bytes -- up to 256 bytes (512 bytes in 3.3). The pools themselves ar...
copying all contents of folder to another folder using batch file?
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xcopy /s c:\Folder1 d:\Folder2
You can find more options at http://www.computerhope.com/xcopyhlp.htm
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“x not in y” or “not x in y”
... 3 LOAD_CONST 2 ('spam and eggs')
6 COMPARE_OP 7 (not in)
9 POP_TOP
10 LOAD_CONST 0 (None)
13 RETURN_VALUE
>>> def not_in():
not 'ham' in 'spam and eggs'
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How to extract request http headers from a request using NodeJS connect
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207
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What's a reliable way to make an iOS app crash?
... works on any system I know -- in a future version of the C runtime OR the compiler this might not lead to a crash anymore. see Is null pointer dereference undefined behavior in Objective-C?)
(in swift you would have to bridge to objC to do this)
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Bash set +x without it being printed
...em, and I was able to find a solution that doesn't use a subshell:
set -x
command
{ set +x; } 2>/dev/null
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