syntax

问题 This question already has answers here : Should preprocessor instructions be on the beginning of a line? (5 answers) Closed 5 years ago . I have programmed C for quite a while now. During this time I have learned that it is a common convention to put the "#"-character that comes before preprocessor-directives at column one. Example: #include <stdio.h> int main(void) { #ifdef MACRO1 #ifdef MACRO2 puts("defined(MACRO1) && defined(MACRO2)"); #else puts("defined(MACRO1)"); #endif #else puts("

问题 In vim can you call a theme for example, 'colo:desert' and colorize certain syntax which are not colorized like lets say i wanted to colorize the words "Access Validation" and "Panel" to green will Vim let met do that? Below is my desert theme which i use to colorize my syntax " cool help screens " :he group-name " :he highlight-groups " :he cterm-colors set background=dark if version > 580 " no guarantees for version 5.8 and below, but this makes it stop " complaining hi clear if exists(

问题 I stumbled upon this code on github: if (requestHeaders is {}) and I don't understand what it does exactly. Upon experimenting it's seems to only be false when requestHeaders is null. Is this just another way of writing if (requestHeaders != null) or if (!(requestHeaders is null)) ? 回答1: The pattern-matching in C# supports property pattern matching. e.g. if (requestHeaders is HttpRequestHeader {X is 3, Y is var y}) The semantics of a property pattern is that it first tests if the input is non

问题 I try to remove the Integer duplicates of a List of (String, Int) , where I am guaranteed that there is no String duplicate. Is it possible to evaluate something like this in Haskell: I tried: [(a,b) | (a,b) <- bs, (c,k) <- bs, ((k == b) <= (a == c))] but this does not yet work. Edit: I am well aware, that you can achieve that using more complex syntax. For example by recursively searching the List for each elements duplicates... 回答1: (NB: this is a completely new version of this answer.

问题 I try to remove the Integer duplicates of a List of (String, Int) , where I am guaranteed that there is no String duplicate. Is it possible to evaluate something like this in Haskell: I tried: [(a,b) | (a,b) <- bs, (c,k) <- bs, ((k == b) <= (a == c))] but this does not yet work. Edit: I am well aware, that you can achieve that using more complex syntax. For example by recursively searching the List for each elements duplicates... 回答1: (NB: this is a completely new version of this answer.

问题 Today I wrote code for some programming contest. When I run it I was surprised because of error. Cannot read property 'forEach' of undefined in a place where looks like "error free space". sum = 0 [-1,0,1].forEach(deltar =>{...}); When I add semicolon after sum variable value assignment code start to works. sum = 0; [-1,0,1].forEach(deltar =>{...}); It's very curious about JS behavior what do interpreter mismatch here? how do JS mess with integer and array after it? Here it is a full code of

问题 Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 19 days ago . Improve this question Can someone say why python doesn't allow this? # -*- coding: utf-8 -* import win32api,win32con,os,time,sys x_pad =464 y_pad =235 def tik(): win32api.mouse_event(win32con.MOUSEEVENTF_LEFTDOWN,0,0) time.sleep(.1) win32api.mouse_event(win32con.MOUSEEVENTF_LEFTUP,0

问题 from https://www.poftut.com/ffmpeg-command-tutorial-examples-video-audio/ ffmpeg -i jellyfish-3-mbps-hd-h264.mkv works in cmd but same on Powershell gives Unexpected token '-i' in expression or statement. what's then the right syntax ? 回答1: As currently shown in your question, the command would work just fine in PowerShell. # OK - executable name isn't quoted. ffmpeg -i jellyfish-3-mbps-hd-h264.mkv However, if you quote the executable path, the problem surfaces . # FAILS, due to SYNTAX ERROR,

来源： https://stackoverflow.com/questions/60262649/how-to-convert-html-to-well-formed-docx-with-styling-attributes-intact